View Filing Data

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2011	Jun. 30, 2011
Document and Entity Information [Abstract]
Entity Registrant Name	VORNADO REALTY TRUST
Entity Central Index Key	0000899689
Document Type	10-K
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q4
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	185,080,020
Entity Public Float		$ 15,602,381
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Real estate, at cost:
Land	$ 4,558,181	$ 4,535,042
Buildings and improvements	12,709,356	12,510,244
Development costs and construction in progress	230,823	217,505
Leasehold improvements and equipment	128,651	124,910
Total	17,627,011	17,387,701
Less accumulated depreciation and amortization	(3,095,037)	(2,715,046)
Real estate, net	14,531,974	14,672,655
Cash and cash equivalents	606,553	690,789
Restricted cash	98,068	200,822
Marketable securities	741,321	766,116
Accounts receivable, net of allowance for doubtful accounts of $43,241 and $62,979	171,798	157,146
Investments in partially owned entities	1,740,459	1,375,006
Real Estate Fund investments	346,650	144,423
Mezzanine loans receivable, net	133,948	202,412
Receivable arising from the straight-lining of rents, net of allowance of $4,046 and $7,316	728,626	695,486
Deferred leasing and financing costs, net of accumulated amortization of $245,087 and $219,965	376,292	354,864
Identified intangible assets, net of accumulated amortization of $359,944 and $335,113	319,704	346,157
Assets related to discontinued operations	251,202	519,285
Due from officers	13,127	13,187
Other assets	386,765	379,123
Assets	20,446,487	20,517,471
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Notes and mortgages payable	8,558,275	8,255,101
Senior unsecured notes	1,357,661	1,082,928
Exchangeable senior debentures	497,898	491,000
Convertible senior debentures	10,168	186,413
Revolving credit facility debt	138,000	874,000
Accounts payable and accrued expenses	423,512	438,479
Deferred credit	516,259	575,836
Deferred compensation plan	95,457	91,549
Deferred tax liabilities	13,315	13,278
Liabilities related to discontinued operations	14,153	267,652
Other liabilities	152,665	82,856
Total liabilities	11,777,363	12,359,092
Commitments and contingencies
Redeemable noncontrolling interests:
Class A units - 12,160,771 and 12,804,202 units outstanding	934,677	1,066,974
Series D cumulative redeemable preferred units - 9,000,001 and 10,401,001 units outstanding	226,000	261,000
Total redeemable noncontrolling interests	1,160,677	1,327,974
Vornado shareholders' equity:
Preferred shares of beneficial interest: no par value per share; authorized 110,000,000 shares; issued and outstanding 42,186,709 and 32,340,009 shares	1,021,660	783,088
Common shares of beneficial interest: $.04 par value per share; authorized, 250,000,000 shares; issued and outstanding 185,080,020 and 183,661,875 shares	7,373	7,317
Additional capital	7,127,258	6,932,728
Earnings less than distributions	(1,401,704)	(1,480,876)
Accumulated other comprehensive income	73,729	73,453
Total Vornado shareholders' equity	6,828,316	6,315,710
Noncontrolling interests in consolidated subsidiaries	680,131	514,695
Total equity	7,508,447	6,830,405
Total liabilities, redeemable noncontrolling interests and equity	20,446,487	20,517,471
Toys R Us [Member]
Real estate, at cost:
Investments in partially owned entities	506,809	447,334
All Equity Method Investees Excluding Toys [Member]
Real estate, at cost:
Investments in partially owned entities	$ 1,233,650	$ 927,672

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUES:
Property rentals	$ 2,261,811	$ 2,237,707	$ 2,148,975
Tenant expense reimbursements	349,420	355,616	351,290
Cleveland Medical Mart development project	154,080	0	0
Fee and other income	150,354	147,358	155,326
Total Revenues	2,915,665	2,740,681	2,655,591
EXPENSES:
Operating	1,091,597	1,082,844	1,050,545
Depreciation and amortization	553,811	522,022	519,534
General and administrative	209,981	213,949	230,584
Cleveland Medical Mart development project	145,824	0	0
Tenant buy-outs, impairment losses and other acquisition related costs	58,299	129,458	73,763
Total expenses	2,059,512	1,948,273	1,874,426
Operating income	856,153	792,408	781,165
Income from partially owned entities	120,310	94,062	72,390
Income (loss) from Real Estate Fund (of which $13,598 and $(806), respectively, are attributable to noncontrolling interests)	22,886	(303)	0
Interest and other investment income (loss), net	148,826	235,315	(116,350)
Interest and debt expense (including amortization of deferred financing costs of $20,729, $18,542 and $17,593 respectively)	(544,015)	(560,052)	(617,768)
Net gain (loss) on extinguishment of debt	0	94,789	(25,915)
Net gain on disposition of wholly owned and partially owned assets	15,134	81,432	5,641
Income before income taxes	619,294	737,651	99,163
Income tax expense	(24,827)	(22,476)	(20,642)
Income from continuing operations	594,467	715,175	78,521
Income (loss) from discontinued operations	145,533	(7,144)	49,929
Net income	740,000	708,031	128,450
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries	(21,786)	(4,920)	2,839
Net (income) attributable to noncontrolling interests in the Operating Partnership, including unit distributions	(55,912)	(55,228)	(25,120)
Net income attributable to Vornado	662,302	647,883	106,169
Preferred share dividends	(65,531)	(55,534)	(57,076)
Discount on preferred share and unit redemptions	5,000	4,382	0
NET INCOME attributable to common shareholders	$ 601,771	$ 596,731	$ 49,093
INCOME PER COMMON SHARE - BASIC:
Income from continuing operations, net	$ 2.52	$ 3.31	$ 0.01
Income (loss) from discontinued operations, net	0.74	(0.04)	0.27
Net income per common share	$ 3.26	$ 3.27	$ 0.28
Weighted average shares	184,308	182,340	171,595
INCOME PER COMMON SHARE - DILUTED:
Income from continuing operations, net	$ 2.50	$ 3.28	$ 0.01
Income (loss) from discontinued operations, net	0.73	(0.04)	0.27
Net income per common share	$ 3.23	$ 3.24	$ 0.28
Weighted average shares	186,021	184,159	173,503
Toys R Us [Member]
EXPENSES:
Income from partially owned entities	$ 48,540	$ 71,624	$ 92,300
All Equity Method Investees Excluding Toys [Member]
EXPENSES:
Income from partially owned entities	$ 71,770	$ 22,438	$ (19,910)

Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands	Total	Real Estate Fund [Member]	All Other Except Real Estate Fund [Member]	Preferred Shares	Common Shares	Additional Capital	Earnings Less Than Distributions	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests	Non-controlling Interests Real Estate Fund [Member]	Non-controlling Interests All Other Except Real Estate Fund [Member]
Beginning balance, Shares at Dec. 31, 2008				33,954	155,286
Beginning balance, Value at Dec. 31, 2008	$ 6,214,652			$ 823,807	$ 6,195	$ 6,025,976	$ (1,047,340)	$ (6,899)	$ 412,913
Net income (loss)	103,330						106,169		(2,839)
Common Stock Dividends Shares					6,441
Dividends paid on common shares, Value	(262,397)				$ 258	285,338	(547,993)
Dividends paid on preferred shares, Value	(57,076)						(57,076)
Proceeds from the issuance of shares, Shares					17,250
Proceeds from the issuance of shares, Value	710,226				$ 690	709,536
Common shares issued:
Upon redemption of Class A units, at redemption value, Shares					1,768
Upon redemption of Class A units, at redemption value, Value	90,955				$ 70	90,885
Under employees' share option plan, Shares					468
Under employees' share option plan, Value	(29,638)				$ 4	1,713	(31,355)
Limited partner's distribution:
Conversion Of Series A preferred shares to common shares, Shares				(2)	2
Conversion of Series A preferred shares to common shares, Value	0			$ (89)	$ 0	89
Deferred compensation shares and options, Shares					(1)
Deferred compensation shares and options, Value	13,092				$ 1	13,091
Change in unrealized net gain on securities available-for-sale	6,147							6,147
Sale of securities available-for-sale	7,715							7,715
Pro rata share of other comprehensive income of nonconsolidated subsidiaries	22,052							22,052
Voluntary surrender of equity awards on March 31, 2009	32,588					32,588
Change in value of interest rate swap	0
Adjustment to carry redeemable Class A units at redemption value	(167,049)					(167,049)
Allocation of cash paid to the equity component upon repurchase of convertible senior debentures	(30,159)					(30,159)
Other	(5,032)			$ (32)		(1,001)	4	(566)	(3,437)
Ending balance, Shares at Dec. 31, 2009				33,952	181,214
Ending balance, Value at Dec. 31, 2009	6,649,406			$ 823,686	$ 7,218	6,961,007	(1,577,591)	28,449	406,637
Net income (loss)	652,803						647,883		4,920
Dividends paid on common shares, Value	(474,299)						(474,299)
Dividends paid on preferred shares, Value	(55,669)						(55,669)
Redemption of preferred shares, Shares				1,600
Redemption of preferred shares, Value	(35,600)			$ (39,982)			4,382
Common shares issued:
Upon redemption of Class A units, at redemption value, Shares					1,548
Upon redemption of Class A units, at redemption value, Value	126,764				$ 62	126,702
Under employees' share option plan, Shares					812
Under employees' share option plan, Value	(261)				$ 33	25,290	(25,584)
In connection with dividend reinvestment plan, Shares					22
In connection with dividend reinvestment plan, Value	1,657				$ 1	1,656
Limited partners' contributions:
Limited partners' contribution		$ 93,583	$ 8,783							$ 93,583	$ 8,783
Limited partner's distribution:
Conversion Of Series A preferred shares to common shares, Shares				(12)	18
Conversion of Series A preferred shares to common shares, Value	0			$ (616)	$ 1	615
Deferred compensation shares and options, Shares					48
Deferred compensation shares and options, Value	9,347				$ 2	9,345
Change in unrealized net gain on securities available-for-sale	46,447							46,447
Sale of securities available-for-sale	(13,160)							(13,160)
Pro rata share of other comprehensive income of nonconsolidated subsidiaries	11,853							11,853
Change in value of interest rate swap	0
Adjustment to carry redeemable Class A units at redemption value	(191,826)					(191,826)
Other	577					(61)	2	(136)	772
Ending balance, Shares at Dec. 31, 2010				32,340	183,662
Ending balance, Value at Dec. 31, 2010	6,830,405			$ 783,088	$ 7,317	6,932,728	(1,480,876)	73,453	514,695
Net income (loss)	684,088						662,302		21,786
Dividends paid on common shares, Value	(508,745)						(508,745)
Dividends paid on preferred shares, Value	(65,694)						(65,694)
Proceeds from the issuance of shares, Shares				9,850
Proceeds from the issuance of shares, Value	238,842			$ 238,842
Common shares issued:
Upon redemption of Class A units, at redemption value, Shares					798
Upon redemption of Class A units, at redemption value, Value	64,830				$ 32	64,798
Under employees' share option plan, Shares					590
Under employees' share option plan, Value	10,439				$ 23	23,705	(13,289)
In connection with dividend reinvestment plan, Shares					21
In connection with dividend reinvestment plan, Value	1,772				$ 1	1,771	0
Limited partners' contributions:
Limited partners' contribution		203,407	778							203,407	778
Limited partner's distribution:
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		$ (49,422)	$ (15,604)							$ (49,422)	$ (15,604)
Conversion Of Series A preferred shares to common shares, Shares				(3)	5
Conversion of Series A preferred shares to common shares, Value	0			$ (165)	$ 0	165
Deferred compensation shares and options, Shares					4
Deferred compensation shares and options, Value	10,085				$ 0	10,608	(523)
Change in unrealized net gain on securities available-for-sale	46,177							46,177
Sale of securities available-for-sale	(9,540)							(9,540)
Pro rata share of other comprehensive income of nonconsolidated subsidiaries	12,859							12,859
Change in value of interest rate swap	(43,704)							(43,704)
Adjustment to carry redeemable Class A units at redemption value	98,092					98,092
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	(271)							(271)
Other	(347)			$ (105)		(4,609)	5,121	(5,245)	4,491
Ending balance, Shares at Dec. 31, 2011				42,187	185,080
Ending balance, Value at Dec. 31, 2011	$ 7,508,447			$ 1,021,660	$ 7,373	$ 7,127,258	$ (1,401,704)	$ 73,729	$ 680,131

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows from Operating Activities:
Net income	$ 740,000	$ 708,031	$ 128,450
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	580,990	556,312	559,053
Equity in income of partially owned entities including ToysRUs	(120,310)	(94,062)	(72,390)
Distributions of income from partially owned entities	93,635	61,037	30,473
Net (gain) loss on extinguishment of debt	(83,907)	(97,728)	25,915
Mezzanine loans loss (reversal) accrual	(82,744)	(53,100)	190,738
Amortization Of Below Market Leases Net Adjusted For Discontinued Operations	(63,044)	(66,202)	(72,481)
Impairment losses, write-off of tenant buy-outs and litigation loss accrual	58,173	137,367	91,184
Net gain on sale of real estate	(51,623)	(2,506)	(45,284)
Straight-lining of rental income	(45,788)	(76,926)	(98,355)
Other non-cash adjustments	27,325	36,352	15,196
Recognition of disputed account receivable from Stop & Shop	(23,521)	0	0
Net realized and unrealized gains on Real Estate Fund assets	(17,386)	0	0
Net gain on disposition of wholly owned and partially owned assets	(15,134)	(81,432)	(5,641)
(Income) loss from the mark-to-market of J.C. Penney derivative position	(12,984)	(130,153)	0
Interest received on repayment on mezzanine loan	0	40,467	0
Write Off Of Unamortized Costs From Voluntary Surrender Of Equity Awards	0	0	32,588
Changes in operating assets and liabilities:
Real Estate Fund Investments	(184,841)	(144,423)	0
Accounts receivable, net	8,869	2,019	15,383
Prepaid assets	(7,779)	6,321	(90,519)
Other assets	(87,488)	(66,736)	(61,878)
Accounts payable and accrued expenses	(28,699)	2,645	(3,606)
Other liabilities	18,755	33,803	(5,247)
Net cash provided by operating activities	702,499	771,086	633,579
Increase Decrease Allowance Relating To Litigation	23,521	0	0
Cash Flows from Investing Activities:
Investments in partially owned entities	(571,922)	(165,170)	(38,266)
Distributions of capital from partially owned entities	318,966	51,677	16,790
Proceeds from sales and repayments of mezzanine loans receivable and other	187,294	70,762	47,397
Additions to real estate	(165,680)	(144,794)	(216,669)
Proceeds from sales of real estate and related investments	140,186	127,736	367,698
Restricted cash	126,380	138,586	111,788
Investments in mezzanine loans receivable and other	(98,979)	(85,336)	0
Development costs and construction in progress	(93,066)	(156,775)	(465,205)
Acquisitions of real estate and other	(90,858)	(173,413)	0
Proceeds from sales of, and return of investment in, marketable securities	70,418	280,462	64,355
Return of J.C. Penney derivative collateral	56,350	0	0
Funding of J.C. Penney derivative collateral	(43,850)	(12,500)	0
Proceeds from the repayment of loan to officer	13,123	0	0
Loan to officer	(13,123)	0	0
Purchases of marketable securities including J.C. Penney common shares and other	0	(491,596)	(90,089)
Proceeds from maturing short-term investments	0	40,000	15,000
Purchases of short-term investments	0	0	(55,000)
Net cash provided by (used in) investing activities	(164,761)	(520,361)	(242,201)
Cash Flows from Financing Activities:
Repayments of borrowings	(3,740,327)	(1,564,143)	(2,075,236)
Proceeds from borrowings	3,412,897	2,481,883	2,648,175
Dividends paid on common shares	(508,745)	(474,299)	(262,397)
Proceeds from the issuance of Series J preferred shares	238,842	0	0
Contributions from noncontrolling interests	204,185	103,831	2,180
Distributions to noncontrolling interests	(116,510)	(53,842)	(42,451)
Dividends paid on preferred shares	(61,464)	(55,669)	(57,076)
Debt issuance and other costs	(47,395)	(14,980)	(30,186)
Purchase of outstanding preferred units and shares	(28,000)	(78,954)	(24,330)
Proceeds received from exercise of employee share options	25,507	26,993	1,750
Repurchase of shares related to stock compensation agreements and related tax withholdings	(964)	(25,660)	(32,203)
Acquisition of convertible senior debentures and senior unsecured notes	0	(440,575)	(2,221,204)
Proceeds from issuance of common shares	0	0	710,226
Net cash used in by financing activities	(621,974)	(95,415)	(1,382,752)
Net (decrease) increase in cash and cash equivalents	(84,236)	155,310	(991,374)
Cash and cash equivalents at beginning of period	690,789	535,479	1,526,853
Cash and cash equivalents at end of period	606,553	690,789	535,479
Supplemental Disclosure Of Cash Flow Information [Abstract]
Cash payments for interest (net of amounts capitalized of $1,197, $864 and $17,256)	531,174	549,327	631,573
Cash payments for income taxes	26,187	23,960	21,775
Non-Cash Investing and Financing Activities:
Adjustment to carry redeemable Class A units at redemption value	98,092	(191,826)	(167,049)
Contribution of mezzanine loan receivable to joint venture	73,750	0	0
Write-off of fully depreciated assets	(72,279)	(63,007)	(86,291)
Common shares issued upon redemption of Class A units at redemption value	64,830	126,764	90,955
Change in unrealized net gain on securities available-for-sale	46,177	46,447	6,147
Like-kind exchange of real estate	(23,626)	0	0
Financing assumed in acquisitions	0	102,616	0
Dividends paid in common shares	0	0	285,596
Unit distributions paid in Class A units	0	0	23,876
Increase in assets and liabilities resulting from the consolidation of investments previously accounted for on the equity method:
Real Estate, net	0	(102,804)	0
Notes and mortgages payable	0	57,563	0
Decrease in assets and liabilities resulting from deconsolidation of investments that were previously consolidated:
Real Estate, Net	145,333	401,857	0
Notes and Mortgages Payable	(232,502)	(316,490)	0
Toys R Us [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income of partially owned entities including ToysRUs	(48,540)	(71,624)	(92,300)
All Equity Method Investees Excluding Toys [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income of partially owned entities including ToysRUs	$ (71,770)	$ (22,438)	$ 19,910

Basis of Presentation and Significant Accounting Policies

12 Months Ended

Dec. 31, 2011

Basis of Presentation and Significant Accounting Policies [Abstract]

Basis Of Presentation And Significant Accounting Policies

2. Basis of Presentation and Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements include the accounts of Vornado and the Operating Partnership. All significant inter-company amounts have been eliminated. We account for unconsolidated partially owned entities on the equity method of accounting. Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America, which require us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.

Recently Issued Accounting Literature

In May 2011, the Financial Accounting Standards Board (“FASB”) issued Update No. 2011-04, Fair Value Measurements (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS (“ASU No. 2011-04”). ASU No. 2011-04 provides a uniform framework for fair value measurements and related disclosures between GAAP and International Financial Reporting Standards (“IFRS”) and requires additional disclosures, including: (i) quantitative information about unobservable inputs used, a description of the valuation processes used, and a qualitative discussion about the sensitivity of the measurements to changes in the unobservable inputs, for Level 3 fair value measurements; (ii) fair value of financial instruments not measured at fair value but for which disclosure of fair value is required, based on their levels in the fair value hierarchy; and (iii) transfers between Level 1 and Level 2 of the fair value hierarchy. ASU No. 2011-04 is effective for interim and annual periods beginning on or after December 15, 2011. The adoption of this update on January 1, 2012 is not expected to have a material impact on our consolidated financial statements.

In June 2011, the FASB issued Update No. 2011-05, Comprehensive Income (Topic 220): Presentation of Comprehensive Income (“ASU No. 2011-05”). ASU No. 2011-05 requires the presentation of net income and other comprehensive income in one continuous statement or in two separate but consecutive statements. ASU No. 2011-05 is effective for interim and annual periods beginning on or after December 15, 2011, with early adoption permitted. The Company early adopted this guidance as of December 31, 2011, and has presented the Consolidated Statements of Comprehensive Income as a separate financial statement.

In September 2011, the FASB issued Update No. 2011-09, Compensation – Retirement Benefits (Topic 715): Disclosures About an Employer's Participation in a Multiemployer Plan (“ASU No. 2011-09”). ASU No. 2011-09 requires enhanced disclosures about an entity's participation in multiemployer plans that offer pension and other postretirement benefits. ASU No. 2011-09 became effective for interim and annual periods ending on or after December 15, 2011. The adoption of this update on December 31, 2011 did not have a material impact on our consolidated financial statements.

Significant Accounting Policies

Real Estate: Real estate is carried at cost, net of accumulated depreciation and amortization. Betterments, major renewals and certain costs directly related to the improvement and leasing of real estate are capitalized. Maintenance and repairs are expensed as incurred. For redevelopment of existing operating properties, the net book value of the existing property under redevelopment plus the cost for the construction and improvements incurred in connection with the redevelopment are capitalized to the extent the capitalized costs of the property do not exceed the estimated fair value of the redeveloped property when complete. If the cost of the redeveloped property, including the undepreciated net book value of the property carried forward, exceeds the estimated fair value of redeveloped property, the excess is charged to expense. Depreciation is provided on a straight-line basis over estimated useful lives which range from 7 to 40 years. Tenant allowances are amortized on a straight-line basis over the lives of the related leases, which approximate the useful lives of the assets. Additions to real estate include interest expense capitalized during construction of $1,197,000 and $864,000 for the years ended December 31, 2011 and 2010, respectively.

2. Basis of Presentation and Significant Accounting Policies- continued

Upon the acquisition of real estate, we assess the fair value of acquired assets (including land, buildings and improvements, identified intangibles, such as acquired above and below-market leases and acquired in-place leases and tenant relationships) and acquired liabilities and we allocate the purchase price based on these assessments. We assess fair value based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including historical operating results, known trends, and market/economic conditions.

Our properties, including any related intangible assets, are individually reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment exists when the carrying amount of an asset exceeds the aggregate projected future cash flows over the anticipated holding period on an undiscounted basis. An impairment loss is measured based on the excess of the property's carrying amount over its estimated fair value. Impairment analyses are based on our current plans, intended holding periods and available market information at the time the analyses are prepared. If our estimates of the projected future cash flows, anticipated holding periods, or market conditions change, our evaluation of impairment losses may be different and such differences could be material to our consolidated financial statements. The evaluation of anticipated cash flows is subjective and is based, in part, on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results. Plans to hold properties over longer periods decrease the likelihood of recording impairment losses. The table below summarizes tenant buy-outs, impairment losses and other acquisition related costs incurred in the years ended December 31, 2011, 2010 and 2009.

(Amounts in thousands)		For the Year Ended December 31,
		2011		2010		2009
Tenant buy-outs, acquisition related costs and other	$	32,259	$	6,945	$	-
Real estate assets		23,000		92,500		4,789
Development projects and undeveloped land		3,040		-		55,307
Condominium units held for sale (see page 132)		-		30,013		13,667
	$	58,299	$	129,458	$	73,763

Partially Owned Entities: In determining whether we have a controlling interest in a partially owned entity and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, authority to make decisions, and contractual and substantive participating rights of the partners/members as well as whether the entity is a variable interest entity in which we have power over significant activities of the entity and the obligation to absorb losses or receive benefits that could potentially be significant to the entity. We have concluded that we do not control a partially owned entity if the entity is not considered a variable interest entity and the approval of all of the partners/members is contractually required with respect to major decisions, such as operating and capital budgets, the sale, exchange or other disposition of real property, the hiring of a chief executive officer, the commencement, compromise or settlement of any lawsuit, legal proceeding or arbitration or the placement of new or additional financing secured by assets of the venture. We account for investments on the equity method when the requirements for consolidation are not met, and we have significant influence over the operations of the investee. Equity method investments are initially recorded at cost and subsequently adjusted for our share of net income or loss and cash contributions and distributions each period. Investments that do not qualify for consolidation or equity method accounting are accounted for on the cost method. Investments in partially owned entities are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment loss is measured based on the excess of the carrying amount of an investment over its estimated fair value. Impairment analyses are based on current plans, intended holding periods and available information at the time the analyses are prepared. In the years ended December 31, 2011, 2010 and 2009, we recognized non-cash impairment losses on investments in partially owned entities aggregating $13,794,000, $11,481,000 and $17,820,000, respectively.

2. Basis of Presentation and Significant Accounting Policies – continued

Identified Intangibles: We record acquired intangible assets (including acquired above-market leases, tenant relationships and acquired in-place leases) and acquired intangible liabilities (including below–market leases) at their estimated fair value separate and apart from goodwill. We amortize identified intangibles that have finite lives over the period they are expected to contribute directly or indirectly to the future cash flows of the property or business acquired. Intangible assets that are subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. An impairment loss is measured based on the excess of carrying amount of the identified intangible over its estimated fair value. As of December 31, 2011 and 2010, the carrying amounts of identified intangible assets were $319,704,000 and $346,157,000, respectively. The carrying amounts of identified intangible liabilities, a component of “deferred credit” on our consolidated balance sheets, were $467,187,000 and $521,372,000, respectively.

Mezzanine Loans Receivable: We invest in mezzanine loans of entities that have significant real estate assets. These investments, which are subordinate to the mortgage loans secured by the real property, are generally secured by pledges of the equity interests of the entities owning the underlying real estate. We record these investments at the stated principal amount net of any unamortized discount or premium. We accrete or amortize any discount or premium over the life of the related receivable utilizing the effective interest method or straight-line method, if the result is not materially different. We evaluate the collectibility of both interest and principal of each of our loans whenever events or changes in circumstances indicate such amounts may not be recoverable. A loan is impaired when it is probable that we will be unable to collect all amounts due according to the existing contractual terms. When a loan is impaired, the amount of the loss accrual is calculated by comparing the carrying amount of the investment to the present value of expected future cash flows discounted at the loan's effective interest rate, or as a practical expedient, to the value of the collateral if the loan is collateral dependent. Interest on impaired loans is recognized when received in cash. In the year ended December 31, 2009 we recorded a $190,738,000 loss accrual on our portfolio of mezzanine loans, of which $72,270,000 and $53,100,000 was reversed in 2011 and 2010, respectively.

Cash and Cash Equivalents: Cash and cash equivalents consist of highly liquid investments with original maturities of three months or less. The majority of our cash and cash equivalents are held at major commercial banks which may at times exceed the Federal Deposit Insurance Corporation limit. To date, we have not experienced any losses on our invested cash.

Restricted Cash: Restricted cash consists of security deposits, cash restricted in connection with our deferred compensation plan and cash escrowed under loan agreements for debt service, real estate taxes, property insurance and capital improvements.

Allowance for Doubtful Accounts: We periodically evaluate the collectibility of amounts due from tenants and maintain an allowance for doubtful accounts for estimated losses resulting from the inability of tenants to make required payments under the lease agreements. We also maintain an allowance for receivables arising from the straight-lining of rents. This receivable arises from earnings recognized in excess of amounts currently due under the lease agreements. Management exercises judgment in establishing these allowances and considers payment history and current credit status in developing these estimates. As of December 31, 2011 and 2010, we had $43,241,000 and $62,979,000, respectively, in allowances for doubtful accounts. In addition, as of December 31, 2011 and 2010, we had $4,046,000 and $7,316,000, respectively, in allowances for receivables arising from the straight-lining of rents.

Deferred Charges: Direct financing costs are deferred and amortized over the terms of the related agreements as a component of interest expense. Direct costs related to successful leasing activities are capitalized and amortized on a straight line basis over the lives of the related leases. All other deferred charges are amortized on a straight line basis, which approximates the effective interest rate method, in accordance with the terms of the agreements to which they relate.

Stock-Based Compensation: Stock-based compensation consists of awards to certain employees and officers and consists of stock options, restricted stock, restricted Operating Partnership units and out-performance plan awards. We account for all stock-based compensation in accordance with ASC 718, Compensation – Stock Compensation.

2. Basis of Presentation and Significant Accounting Policies – continued

Revenue Recognition: We have the following revenue sources and revenue recognition policies:

• Base Rent — income arising from tenant leases. These rents are recognized over the non-cancelable term of the related leases on a straight-line basis which includes the effects of rent steps and rent abatements under the leases. We commence rental revenue recognition when the tenant takes possession of the leased space and the leased space is substantially ready for its intended use. In addition, in circumstances where we provide a tenant improvement allowance for improvements that are owned by the tenant, we recognize the allowance as a reduction of rental revenue on a straight-line basis over the term of the lease.

• Percentage Rent — income arising from retail tenant leases that is contingent upon tenant sales exceeding defined thresholds. These rents are recognized only after the contingency has been removed (i.e., when tenant sales thresholds have been achieved).

• Hotel Revenue — income arising from the operation of the Hotel Pennsylvania which consists of rooms revenue, food and beverage revenue, and banquet revenue. Income is recognized when rooms are occupied. Food and beverage and banquet revenue is recognized when the services have been rendered.

• Trade Shows Revenue — income arising from the operation of trade shows, including rentals of booths. This revenue is recognized when the trade shows have occurred.

• Expense Reimbursements — revenue arising from tenant leases which provide for the recovery of all or a portion of the operating expenses and real estate taxes of the respective property. This revenue is accrued in the same periods as the expenses are incurred.

• Management, Leasing and Other Fees — income arising from contractual agreements with third parties or with partially owned entities. This revenue is recognized as the related services are performed under the respective agreements.

• Cleveland Medical Mart — revenue arising from the development of the Cleveland Medical Mart. This revenue is recognized as the related services are performed under the respective agreements using the criteria set forth in ASC 605-25, Multiple Element Arrangements, as we are providing development, marketing, leasing, and other property management services.

Condominium Units Held For Sale: Condominium units held for sale are carried at the lower of cost or fair value less costs to sell. As of December 31, 2011 and 2010, condominiums held for sale, which are included in “other assets” on our consolidated balance sheet, aggregate $60,785,000 and $84,397,000, respectively and consist of substantially completed units at Granite Park in Pasadena, The Bryant in Boston and our 40 East 66th Street property in Manhattan. Revenue from condominium unit sales is recognized upon closing of the sale (the “completed contract method”), as all conditions for full profit recognition have been met at that time. We use the relative sales value method to allocate costs to individual condominium units. Net gains on sales of condominiums units are included in “net gains on disposition of wholly owned and partially owned assets” on our consolidated statements of income. In the years ended December 31, 2010 and 2009, we recognized non-cash impairment losses related to certain of these condominiums aggregating $30,013,000 and $13,667,000, respectively, based on our assessments of the expected net sales proceeds associated with these condominium projects. These losses are included in “tenant buy-outs, impairment losses and other acquisition related costs” on our consolidated statements of income.

2. Basis of Presentation and Significant Accounting Policies – continued

Derivative Instruments and Hedging Activities: ASC 815, Derivatives and Hedging, as amended, establishes accounting and reporting standards for derivative instruments, including certain derivative instruments embedded in other contracts, and for hedging activities. As of December 31, 2011 and 2010, our derivative instruments consisted primarily of a portion of our investment in J.C. Penney common shares (see Note 4 – Marketable Securities and Derivative Instruments) and interest rate swaps. We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges.

For derivatives designated as fair value hedges, changes in the fair value of the derivative and the hedged item related to the hedged risk are recognized in earnings. For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income (loss) (outside of earnings) and subsequently reclassified to earnings when the hedged transaction affects earnings, and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. We assess the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative hedging instrument with the changes in fair value or cash flows of the designated hedged item or transaction. For derivatives not designated as hedges, changes in fair value are recognized in earnings.

Income Per Share: Basic income per share is computed based on weighted average shares outstanding. Diluted income per share considers the effect of all potentially dilutive share equivalents, including outstanding employee stock options, restricted shares and convertible or redeemable securities.

Income Taxes: We operate in a manner intended to enable us to continue to qualify as a REIT under Sections 856-860 of the Internal Revenue Code of 1986, as amended. Under those sections, a REIT which distributes at least 90% of its REIT taxable income as a dividend to its shareholders each year and which meets certain other conditions will not be taxed on that portion of its taxable income which is distributed to its shareholders. We distribute to shareholders 100% of taxable income and therefore, no provision for Federal income taxes is required. Dividends distributed for the year ended December 31, 2011, were characterized, for federal income tax income tax purposes, as 93.2% ordinary income and 6.8% as long term capital gain. Dividend distributions for the year ended December 31, 2010, were characterized, for Federal income tax purposes, as 95.9% ordinary income, 2.8% long-term capital gain and 1.3% return of capital. Dividend distributions for the year ended December 31, 2009 were characterized, for Federal income tax purposes, as 63.9% ordinary income, 0.9% long-term capital gain and 35.2% return of capital.

We have elected to treat certain consolidated subsidiaries, and may in the future elect to treat newly formed subsidiaries, as taxable REIT subsidiaries pursuant to an amendment to the Internal Revenue Code that became effective January 1, 2001. Taxable REIT subsidiaries may participate in non-real estate related activities and/or perform non-customary services for tenants and are subject to Federal and State income tax at regular corporate tax rates. Our taxable REIT subsidiaries had a combined current income tax liability of approximately $26,645,000 and $24,858,000 at December 31, 2011 and 2010, respectively, and have immaterial differences between the financial reporting and tax basis of assets and liabilities.

The following table reconciles net income attributable to common shareholders to estimated taxable income for the years ended December 31, 2011, 2010 and 2009.

(Amounts in thousands)			For the Year Ended December 31,
			2011		2010		2009
Net income attributable to common shareholders		$	601,771	$	596,731	$	49,093
Book to tax differences (unaudited):
	Depreciation and amortization		225,802		216,473		247,023
	Mezzanine loans receivable		(82,512)		(104,727)		171,380
	Straight-line rent adjustments		(38,800)		(70,606)		(83,959)
	Earnings of partially owned entities		(96,178)		(62,315)		(82,382)
	Stock options		(27,697)		(48,399)		(32,643)
	Sale of real estate		(18,766)		12,899		3,923
	Derivatives		(12,160)		(121,120)		-
	Other, net		(6,223)		48,915		81,936
Estimable taxable income		$	545,237	$	467,851	$	354,371

The net basis of our assets and liabilities for tax reporting purposes is approximately $3.6 billion lower than its amount reported in our consolidated financial statements.

Investments in Partially Owned Entities

12 Months Ended

Dec. 31, 2011

Investments in Partially Owned Entities [Abstract]

Investments in Partially Owned Entities

5. Investments in Partially Owned Entities

The following is a summary of condensed combined financial information for all of our partially owned entities, including Toys “R” Us, Alexander's, Inc., Lexington Realty Trust and LNR Property Corporation, as of December 31, 2011 and 2010 and for the years ended December 31, 2011, 2010 and 2009.

(Amounts in thousands)				December 31,
Balance Sheet:				2011		2010
	Assets⁽¹⁾			$	153,861,000	$	165,183,000
	Liabilities⁽¹⁾				147,854,000		160,203,000
	Noncontrolling interests				132,000		124,000
	Equity				5,875,000		4,856,000

		For the Year Ended December 31,
Income Statement:		2011		2010		2009
	Total revenue	$	15,390,000	$	15,030,000	$	14,321,000
	Net income		199,000		63,000		103,000



(1)	2011 and 2010 includes $127 billion and $142 billion, respectively, of assets and liabilities of LNR related to consolidated CMBS
	and CDO trusts which are non-recourse to LNR and its equity holders, including us.

Toys “R” Us (“Toys”)

As of December 31, 2011, we own 32.7% of Toys. The business of Toys is highly seasonal. Historically, Toys' fourth quarter net income accounts for more than 80% of its fiscal year net income. We account for our investment in Toys under the equity method and record our 32.7% share of Toys net income or loss on a one-quarter lag basis because Toys' fiscal year ends on the Saturday nearest January 31, and our fiscal year ends on December 31. As of December 31, 2011, the carrying amount of our investment in Toys does not differ materially from our share of the equity in the net assets of Toys on a purchase accounting basis.

On May 28, 2010, Toys filed a registration statement, as amended, with the SEC for the offering and sale of its common stock. The offering, if completed, would result in a reduction of our percentage ownership of Toys' equity. The size of the offering and its completion are subject to market and other conditions.

In August 2010, in connection with certain financing and refinancing transactions, Toys paid us an aggregate of $9,600,000 for our share of advisory fees. Since Toys has capitalized these fees and are amortizing them over the term of the related debt, we recorded the fees as a reduction of the basis of our investment in Toys and will amortize the fees into income over the term of the related debt.

Below is a summary of Toys' latest available financial information on a purchase accounting basis:

(Amounts in thousands)				Balance as of
Balance Sheet:				October 29, 2011		October 30, 2010
	Assets			$	13,221,000	$	12,810,000
	Liabilities				11,530,000		11,317,000
	Toys “R” Us, Inc. equity				1,691,000		1,493,000

		For the Twelve Months Ended
Income Statement:		October 29, 2011		October 30, 2010		October 31, 2009
	Total revenues	$	13,956,000	$	13,749,000	$	13,172,000
	Net income attributable to Toys		121,000		189,000		216,000

5. Investments in Partially Owned Entities - continued

Alexander's, Inc. (“Alexander's”) (NYSE: ALX)

As of December 31, 2011, we own 1,654,068 Alexander's commons shares, or approximately 32.4% of Alexander's common equity. We manage, lease and develop Alexander's properties pursuant to the agreements described below which expire in March of each year and are automatically renewable.

As of December 31, 2011 the market value (“fair value” pursuant to ASC 820) of our investment in Alexander's, based on Alexander's 2011 closing share price of $370.03, was $612,055,000, or $422,280,000 in excess of the carrying amount on our consolidated balance sheet. As of December 31, 2011, the carrying amount of our investment in Alexander's, excluding amounts owed to us, exceeds our share of the equity in the net assets of Alexander's by approximately $59,010,000. The majority of this basis difference resulted from the excess of our purchase price for the Alexander's common stock acquired over the book value of Alexander's net assets. Substantially all of this basis difference was allocated, based on our estimates of the fair values of Alexander's assets and liabilities, to real estate (land and buildings). We are amortizing the basis difference related to the buildings into earnings as additional depreciation expense over their estimated useful lives. This depreciation is not material to our share of equity in Alexander's net income. The basis difference related to the land will be recognized upon disposition of our investment.

Management and Development Agreements

We receive an annual fee for managing Alexander's and all of its properties equal to the sum of (i) $3,000,000, (ii) 3% of the gross income from the Kings Plaza Regional Shopping Center, (iii) 2% of the gross income from the Rego Park II Shopping Center, (iv) $0.50 per square foot of the tenant-occupied office and retail space at 731 Lexington Avenue, and (v) $256,000, escalating at 3% per annum, for managing the common area of 731 Lexington Avenue.

In addition, we are entitled to a development fee of 6% of development costs, as defined, with a minimum guaranteed payment of $750,000 per annum. During the years ended December 31, 2011, 2010, and 2009, we recognized $730,000, $711,000 and $2,710,000, respectively, of development fee income.

Leasing Agreements

We provide Alexander's with leasing services for a fee of 3% of rent for the first ten years of a lease term, 2% of rent for the eleventh through twentieth year of a lease term and 1% of rent for the twenty-first through thirtieth year of a lease term, subject to the payment of rents by Alexander's tenants. In the event third-party real estate brokers are used, our fee increases by 1% and we are responsible for the fees to the third-parties. We are also entitled to a commission upon the sale of any of Alexander's assets equal to 3% of gross proceeds, as defined, for asset sales less than $50,000,000, or 1% of gross proceeds, as defined, for asset sales of $50,000,000 or more. The total of these amounts is payable to us in annual installments in an amount not to exceed $4,000,000 with interest on the unpaid balance at one-year LIBOR plus 1.0% (1.78% at December 31, 2011).

Other Agreements

Building Maintenance Services (“BMS”), our wholly-owned subsidiary, supervises the cleaning, engineering and security services at Alexander's 731 Lexington Avenue and Kings Plaza properties for an annual fee of the costs for such services plus 6%. During the years ended December 31, 2011, 2010 and 2009, we recognized $2,970,000, $2,775,000 and $2,552,000 of income, respectively, under these agreements.

Below is a summary of Alexander's latest available financial information:

(Amounts in thousands)				Balance as of
Balance Sheet:				December 31, 2011		December 31, 2010
	Assets			$	1,771,000	$	1,679,000
	Liabilities				1,408,000		1,335,000
	Noncontrolling interests				4,000		3,000
	Stockholders' equity				359,000		341,000

		For the Year Ended
Income Statement:		December 31, 2011		December 31, 2010		December 31, 2009
	Total revenues	$	254,000	$	242,000	$	224,000
	Net income attributable to Alexander’s		79,000		67,000		132,000

5. Investments in Partially Owned Entities - continued

Lexington Realty Trust (“Lexington”) (NYSE: LXP)

As of December 31, 2011, we own 18,468,969 Lexington common shares, or approximately 12.0% of Lexington's common equity. We account for our investment in Lexington on the equity method because we believe we have the ability to exercise significant influence over Lexington's operating and financial policies, based on, among other factors, our representation on Lexington's Board of Trustees and the level of our ownership in Lexington as compared to other shareholders. We record our pro rata share of Lexington's net income or loss on a one-quarter lag basis because we file our consolidated financial statements on Form 10-K and 10-Q prior to the time that Lexington files its financial statements.

Based on Lexington's December 31, 2011 closing share price of $7.49, the market value (“fair value” pursuant to ASC 820) of our investment in Lexington was $138,333,000, or $80,931,000 in excess of the December 31, 2011 carrying amount on our consolidated balance sheet. As of December 31, 2011, the carrying amount of our investment in Lexington was less than our share of the equity in the net assets of Lexington by approximately $49,200,000. This basis difference resulted primarily from $107,882,000 of non-cash impairment charges recognized during 2008, partially offset by purchase accounting for our acquisition of an additional 8,000,000 common shares of Lexington in October 2008, of which the majority relates to our estimate of the fair values of Lexington's real estate (land and buildings) as compared to the carrying amounts in Lexington's consolidated financial statements. The basis difference related to the buildings is being amortized over their estimated useful lives as an adjustment to our equity in net income or loss of Lexington. This amortization is not material to our share of equity in Lexington's net income or loss. The basis difference attributable to the land will be recognized upon disposition of our investment.

Below is a summary of Lexington's latest available financial information:

(Amounts in thousands)				Balance as of
Balance Sheet:				September 30, 2011		September 30, 2010
	Assets			$	3,164,000	$	3,385,000
	Liabilities				1,888,000		2,115,000
	Noncontrolling interests				59,000		71,000
	Shareholders’ equity				1,217,000		1,199,000

		For the Twelve Months Ended September 30,
Income Statement:		2011		2010		2009
	Total revenues	$	335,000	$	330,000	$	375,000
	Net loss attributable to Lexington		(81,000)		(90,000)		(178,000)

LNR Property Corporation (“LNR”)

As of December 31, 2011, we own a 26.2% equity interest in LNR, which we acquired in July 2010. We account for our investment in LNR under the equity method and record our 26.2% share of LNR's net income or loss on a one-quarter lag basis because we file our consolidated financial statements on Form 10-K and 10-Q prior to receiving LNR's consolidated financial statements.

LNR consolidates certain commercial mortgage-backed securities (“CMBS”) and Collateralized Debt Obligation (“CDO”) trusts for which it is the primary beneficiary. The assets of these trusts (primarily commercial mortgage loans), which aggregate approximately $127 billion as of September 30, 2011, are the sole source of repayment of the related liabilities, which are non-recourse to LNR and its equity holders, including us. Changes in the fair value of these assets each period are offset by changes in the fair value of the related liabilities through LNR's consolidated income statement. As of December 31, 2011, the carrying amount of our investment in LNR does not materially differ from our share of LNR's equity.

5. Investments in Partially Owned Entities - continued

Below is a summary of LNR's latest available financial information:

(Amounts in thousands)		Balance as of
Balance Sheet:		September 30, 2011		September 30, 2010
	Assets	$	128,536,000	$	143,266,000
	Liabilities		127,809,000		142,720,000
	Noncontrolling interests		55,000		37,000
	LNR Property Corporation equity		672,000		509,000

		For the Twelve		For the Period
		Months Ended		July 29, 2010 to
Income Statement:		September 30, 2011		September 30, 2010
	Total revenue	$	208,000	$	23,000
	Net income attributable to LNR		224,000		8,000

280 Park Avenue Joint Venture

On March 16, 2011, we formed a 50/50 joint venture with SL Green Realty Corp to own the mezzanine debt of 280 Park Avenue, a 1.2 million square foot office building located between 48th and 49th Streets in Manhattan (the “Property”). We contributed our mezzanine loan with a face amount of $73,750,000, and they contributed their mezzanine loans with a face amount of $326,250,000 to the joint venture. We equalized our interest in the joint venture by paying our partner $111,250,000 in cash and assuming $15,000,000 of their debt. On May 17, 2011, as part of the recapitalization of the Property, the joint venture contributed its debt position for 99% of the common equity of a new joint venture which owns the Property. The new joint venture's investment is subordinate to $710,000,000 of third party debt. The new joint venture expects to spend $150,000,000 for re-tenanting and repositioning the Property. We account for our 49.5% equity interest in the Property under the equity method of accounting from the date of recapitalization.

Independence Plaza

On June 17, 2011, a joint venture in which we are a 51% partner, invested $55,000,000 in cash (of which we contributed $35,000,000) to acquire a face amount of $150,000,000 of mezzanine loans and a $35,000,000 participation in a senior loan on Independence Plaza, a residential complex comprised of three 39-story buildings in the Tribeca submarket of Manhattan. We share control over major decisions with our joint venture partner. We account for our 51% interest in the joint venture under the equity method of accounting from the date of acquisition.

666 Fifth Avenue Office

On December 16, 2011, we formed a joint venture with an affiliate of the Kushner Companies to recapitalize the office portion of 666 Fifth Avenue, a 39-story, 1.4 million square foot Class A office building in Manhattan, located on the full block front of Fifth Avenue between 52nd and 53rd Street. We acquired a 49.5% interest in the property from the Kushner Companies, the current owner. In connection therewith, the existing $1,215,000,000 mortgage loan was modified by LNR, the special servicer, into a $1,100,000,000 A-Note and a $115,000,000 B-Note and extended to February 2019; and a portion of the current pay interest was deferred to the B-Note. We and the Kushner Companies have committed to lend the joint venture an aggregate of $110,000,000 (of which our share is $80,000,000) for tenant improvements and working capital for the property, which is senior to the $115,000,000 B-Note. In addition, we have provided the A-Note holders a limited recourse and cooperation guarantee of up to $75,000,000 if an event of default occurs and is ongoing. We account for our 49.5% interest in the property under the equity method of accounting from the date of recapitalization.

5. Investments in Partially Owned Entities - continued

Below is a schedule of our investments in partially owned entities as of December 31, 2011 and 2010.

(Amounts in thousands)			Percentage		As of December 31,
Investments:			Ownership		2011		2010
Toys				32.7%	$	506,809	$	447,334

Alexander’s				32.4%	$	189,775	$	186,811

Lexington				12.0%		57,402		57,270

LNR				26.2%		174,408		132,973

India real estate ventures				4.0%-36.5%		80,499		127,193

Partially owned office buildings:
	280 Park Avenue (see page 140)			49.5%		184,516		-
	West 57th Street properties			50.0%		58,529		58,963
	Rosslyn Plaza			43.7%-50.4%		53,333		52,689
	One Park Avenue (see page 134)			30.3%		47,568		-
	Warner Building and 1101 17th Street			55.0%		23,122		37,741
	Other partially owned office buildings⁽¹⁾			Various		61,898		36,487

Other equity method investments:
	Verde Realty Operating Partnership			8.3%		59,801		59,326
	Independence Plaza (see page 140)			51.0%		48,511		-
	Downtown Crossing, Boston			50.0%		46,691		46,147
	Monmouth Mall			50.0%		7,536		6,251
	Other equity method investments⁽²⁾			Various		140,061		125,821

					$	1,233,650	$	927,672

___________________________________
(1)		Includes interests in 330 Madison Avenue (25.0%), 666 Fifth Avenue Office (49.5%), 825 Seventh Avenue (50.0%) and Fairfax Square (20.0%).

(2)		Includes interests in 85 10th Avenue Associates, Farley Project, Suffolk Downs, Dune Capital L.P. and others.

5. Investments in Partially Owned Entities – continued

Below is a schedule of income recognized from investments in partially owned entities for the years ended December 31, 2011, 2010 and 2009.

(Amounts in thousands)				For the Year Ended December 31,
Our Share of Net Income (Loss):				2011		2010		2009

Toys - 32.7% interest
	Equity in net income before income taxes⁽¹⁾			$	38,460	$	16,401	$	58,416
	Income tax benefit				1,132		45,418		13,185
	Equity in net income				39,592		61,819		71,601
	Non-cash purchase price accounting adjustments				-		-		13,946
	Interest and other income				8,948		9,805		6,753
				$	48,540	$	71,624	$	92,300

Alexander’s - 32.4% interest
	Equity in net income before income taxes and reversal of
		stock appreciation rights compensation expense ("SARs")		$	25,013	$	20,059	$	17,991
	Income tax benefit and reversal of SARs				-		-		24,773
	Equity in net income				25,013		20,059		42,764
	Management, leasing and development fees				9,115		9,125		10,765
					34,128		29,184		53,529

Lexington - 12.0% interest in 2011, 12.8% interest in 2010
	and 15.2% interest in 2009⁽²⁾				8,351		11,018		(25,665)

LNR - 26.2% interest (acquired in July 2010)⁽³⁾					58,786		1,973		-

India real estate ventures - 4.0% to 36.5% interest⁽⁴⁾					(14,881)		2,581		(1,636)

Partially owned office buildings:
	280 Park Avenue - 49.5% interest (acquired in May 2011)				(18,079)		-		-
	West 57th Street properties - 50.0% interest⁽⁵⁾				876		(10,990)		468
	Rosslyn Plaza - 43.7% to 50.4% interest				2,193		(2,419)		4,870
	One Park Avenue - 30.3% interest (acquired in March 2011)				(1,142)		-		-
	Warner Building and 1101 17th Street - 55.0% interest
		(deconsolidated in October 2010 upon sale of a 45.0% interest)⁽⁶⁾			(16,135)		72		-
	Other partially owned office buildings				10,017		4,436		4,823

Other equity method investments
	Verde Realty Operating Partnership - 8.3% interest⁽⁷⁾				1,661		(537)		(19,978)
	Independence Plaza - 51.0% interest (acquired in June 2011)				2,457		-		-
	Downtown Crossing, Boston - 50.0% interest⁽⁸⁾				(1,461)		(1,155)		(10,395)
	Monmouth Mall - 50.0% interest				2,556		1,952		1,789
	Other equity method investments⁽⁹⁾				2,443		(13,677)		(27,715)
				$	71,770	$	22,438	$	(19,910)
___________________________________

(1)			2009 includes $10,200 for our share of income from a litigation settlement.

(2)			Includes net gains of $9,760 and $13,710 in 2011 and 2010, respectively, resulting from Lexington's stock issuances. 2009 includes $19,121 for our share of impairment losses recorded by Lexington.

(3)			2011 includes $27,377 of income comprised of (i) $12,380 for an income tax benefit, (ii) $8,977 of a tax settlement gain, and (iii) $6,020 of net gains from asset sales.

(4)			2011 includes $13,794 for our share of an impairment loss.

(5)			2010 includes $11,481 of impairment losses.

(6)			2011 includes $9,022 for our share of expense, primarily for straight-line rent reserves and the write-off of tenant improvements in connection with a tenant's bankruptcy at the Warner Building.

(7)			2009 includes $14,515 of impairment losses.

(8)			2009 includes $7,650 of expense for our share of a lease termination payment.

(9)			2011 includes a $12,525 net gain from Suffolk Downs' sale of a partial interest and 2009 includes $3,305 of impairment losses.

5. Investments in Partially Owned Entities - continued

Below is a summary of the debt of our partially owned entities as of December 31, 2011 and 2010; none of which is recourse to us.

				Interest	100% of
				Rate at	Partially Owned Entities’ Debt at
(Amounts in thousands)				December 31,	December 31,		December 31,
			Maturity	2011	2011		2010
Toys (32.7% interest) (as of October 29, 2011 and October 30, 2010,
respectively):
	Senior unsecured notes (Face value – $950,000)		07/17	10.75%	$	930,382	$	928,045
	$1.85 billion credit facility		08/15	2.77%		750,000		519,810
	Senior unsecured notes (Face value – $725,000)		12/17	8.50%		716,583		715,577
	$700 million secured term loan facility		09/16	6.00%		684,217		689,757
	Senior U.K. real estate facility		04/13	5.02%		562,004		561,559
	$400 million secured term loan facility		05/18	5.25%		395,195		-
	7.875% senior notes (Face value – $400,000)		04/13	9.50%		391,520		386,167
	7.375% senior secured notes (Face value - $350,000)		09/16	7.38%		361,561		350,000
	7.375% senior notes (Face value – $400,000)		10/18	9.99%		348,537		343,528
	Japan bank loans		03/12-02/16	1.85%-2.85%		189,525		180,500
	Spanish real estate facility		02/13	4.51%		180,174		179,511
	Junior U.K. real estate facility		04/13	6.81%-7.84%		97,964		98,266
	Japan borrowings		06/12	1.06%		94,968		141,360
	French real estate facility		02/13	4.51%		86,919		86,599
	European and Australian asset-based revolving credit facility		03/16	2.88%		64,520		25,767
	8.750% debentures (Face value – $21,600)		09/21	9.17%		21,089		21,054
	7.625% bonds (Face value – $500,000)		n/a	n/a		-		495,943
	Other		Various	Various		172,363		156,853
						6,047,521		5,880,296

Alexander’s (32.4% interest):
	731 Lexington Avenue mortgage note payable, collateralized by
		the office space	02/14	5.33%		339,890		351,751
	731 Lexington Avenue mortgage note payable, collateralized by
		the retail space	07/15	4.93%		320,000		320,000
	Rego Park II Shopping Center mortgage note payable⁽¹⁾		11/18	2.15%		274,796		277,200
	Kings Plaza Regional Shopping Center mortgage note payable ⁽²⁾		06/16	2.24%		250,000		151,214
	Rego Park I Shopping Center mortgage note payable		03/12	0.75%		78,246		78,246
	Paramus mortgage note payable		10/18	2.90%		68,000		68,000
						1,330,932		1,246,411

Lexington (12.0% and 12.8% interest) (as of September 30, 2011 and
September 30, 2010, respectively):
	Mortgage loans collateralized by Lexington’s real estate		2012-2037	5.80%		1,712,750		1,927,729

LNR (26.2% interest) (as of September 30, 2011 and
September 30, 2010, respectively):
	Mortgage notes payable		2014-2043	4.54%		353,504		508,547
	Liabilities of consolidated CMBS and CDO trusts		n/a	5.32%		127,348,336		142,001,333
						127,701,840		142,509,880


(1)		On November 30, 2011, Alexander's completed a $275,000 refinancing of this loan. The seven-year loan bears interest at LIBOR plus 1.85% and amortizes based on a 30-year schedule.

(2)		On June 10, 2011, Alexander's completed a $250,000 refinancing of this loan. The five-year interest only loan is at LIBOR plus 1.70%.

5. Investments in Partially Owned Entities - continued

				Interest	100% of
				Rate at	Partially Owned Entities’ Debt at
(Amounts in thousands)				December 31,	December 31,		December 31,
			Maturity	2011	2011		2010
Partially owned office buildings:
	666 Fifth Avenue Office (49.5% interest) mortgage note payable		02/19	6.80%	$	1,035,884	$	n/a
	280 Park Avenue (49.5% interest) mortgage notes payable		06/16	6.65%		737,678		n/a
	Warner Building (55.0% interest) mortgage note payable		05/16	6.26%		292,700		292,700
	One Park Avenue (30.3% interest) mortgage note payable		03/16	5.00%		250,000		n/a
	330 Madison Avenue (25.0% interest) mortgage note payable		06/15	1.78%		150,000		150,000
	Fairfax Square (20.0% interest) mortgage note payable		12/14	7.00%		70,974		71,764
	Rosslyn Plaza (43.7% to 50.4% interest) mortgage note payable		01/12	1.27%		56,680		56,680
	330 West 34th Street (34.8% interest) mortgage note payable,
		collateralized by land	07/22	5.71%		50,150		50,150
	West 57th Street (50.0% interest) mortgage note payable		02/14	4.94%		21,864		22,922
	825 Seventh Avenue (50.0% interest) mortgage note payable		10/14	8.07%		20,080		20,565
	Other mortgage notes payable collateralized by real estate⁽¹⁾		n/a	n/a		-		139,337


India Real Estate Ventures:
	TCG Urban Infrastructure Holdings (25.0% interest) mortgage notes
		payable, collateralized by the entity’s real estate	2012-2022	11.87%		226,534		196,319

Other:
	Verde Realty Operating Partnership (8.3% interest) mortgage notes
		payable, collateralized by the partnerships’ real estate	2013-2025	6.18%		340,378		581,086
	Green Courte Real Estate Partners, LLC (8.3% interest) (as of
		September 30, 2011 and 2010), mortgage notes payable,
		collateralized by the partnerships’ real estate	2012-2018	5.63%		293,771		296,991
	Monmouth Mall (50.0% interest) mortgage note payable		02/14-09/15	5.32%		173,938		164,474
	Wells/Kinzie Garage (50.0% interest) mortgage note payable		12/17	5.00%		14,792		15,022
	Orleans Hubbard Garage (50.0% interest) mortgage note payable		12/17	5.00%		9,362		9,508
	Waterfront Station (2.5% interest)		n/a	n/a		-		217,106
	Other		Various	4.62%		663,162		418,339


(1)		On December 23, 2011, we acquired the 97.5% interest we did not already own in the Executive Tower. Accordingly, we consolidate the accounts of this property into our consolidated financial statements from the date of acquisition.

Based on our ownership interest in the partially owned entities above, our pro rata share of the debt of these partially owned entities, was $37,531,298,000 and $40,443,346,000 as of December 31, 2011 and 2010, respectively. Excluding our pro rata share of LNR's liabilities related to consolidated CMBS and CDO trusts, which are non-recourse to LNR and its equity holders, including us, our pro rata share of partially owned entities debt was $4,199,145,000 and $3,275,917,000 at December 31, 2011 and 2010, respectively.

- Definition

The entire disclosure for equity investment, or group of investments, for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20 percent of the voting stock and the investment is accounted for using the equity method, and the reasons why it is.

+ References + Details

SEC Schedule III Real Estate and Accumulated Depreciation

12 Months Ended

Dec. 31, 2011

Real Estate and Accumulated Depreciation [Abstract]

Real Estate And Accumulated Depreciation Disclosure Text Block

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(Amounts in thousands)
COLUMN A						COLUMN B		COLUMN C				COLUMN D		COLUMN E						COLUMN F	COLUMN G	COLUMN H	COLUMN I
														Gross amount at which									Life on which
							Initial cost to company (1)							carried at close of period									depreciation
												Costs							Accumulated				in latest
									Building			capitalized			Buildings				depreciation				income
									and			subsequent			and				and		Date of	Date	statement
Description					Encumbrances		Land		improvements			to acquisition		Land	improvements		Total (2)		amortization		construction (3)	acquired	is computed
	Office Buildings
		New York
			Manhattan
			1290 Avenue of the Americas		$	413,111	$	515,539	$	923,653	$	75,193	$	515,539	$	998,846	$	1,514,385	$	127,938	1963	2007	(4)
			350 Park Avenue			430,000		265,889		363,381		27,457		265,889		390,838		656,727		49,264	1960	2006	(4)
			One Penn Plaza			-		-		412,169		162,098		-		574,267		574,267		194,075	1972	1998	(4)
			100 West 33rd Street (Manhattan Mall)			159,361		242,776		247,970		5,288		242,776		253,258		496,034		31,141	1911	2007	(4)
			Two Penn Plaza			425,000		53,615		164,903		78,476		52,689		244,305		296,994		101,246	1968	1997	(4)
			770 Broadway			353,000		52,898		95,686		73,968		52,898		169,654		222,552		58,810	1907	1998	(4)
			90 Park Avenue			-		8,000		175,890		34,531		8,000		210,421		218,421		77,221	1964	1997	(4)
			888 Seventh Avenue			318,554		-		117,269		94,096		-		211,365		211,365		75,888	1980	1998	(4)
			640 Fifth Avenue			-		38,224		25,992		112,598		38,224		138,590		176,814		51,821	1950	1997	(4)
			Eleven Penn Plaza			330,000		40,333		85,259		49,183		40,333		134,442		174,775		50,168	1923	1997	(4)
			1740 Broadway			-		26,971		102,890		36,896		26,971		139,786		166,757		47,179	1950	1997	(4)
			909 Third Avenue			203,217		-		120,723		55,860		-		176,583		176,583		49,222	1969	1999	(4)
			150 East 58th Street			-		39,303		80,216		28,228		39,303		108,444		147,747		38,427	1969	1998	(4)
			595 Madison Avenue			-		62,731		62,888		17,444		62,731		80,332		143,063		23,464	1968	1999	(4)
			866 United Nations Plaza			44,978		32,196		37,534		8,335		32,196		45,869		78,065		17,376	1966	1997	(4)
			20 Broad Street			-		-		28,760		26,924		-		55,684		55,684		16,914	1956	1998	(4)
			40 Fulton Street			-		15,732		26,388		12,266		15,732		38,654		54,386		12,548	1987	1998	(4)
			689 Fifth Avenue			-		19,721		13,446		10,938		19,721		24,384		44,105		10,476	1925	1998	(4)
			330 West 34th Street			-		-		8,599		6,936		-		15,535		15,535		4,700	1925	1998	(4)
			1540 Broadway Garage			-		4,086		8,914		-		4,086		8,914		13,000		1,235	1990	2006	(4)
			Other			-		-		5,548		67,113		36,106		36,555		72,661		4,794
				Total New York		2,677,221		1,418,014		3,108,078		983,828		1,453,194		4,056,726		5,509,920		1,043,907

		Washington, DC
			2011-2451 Crystal Drive			274,305		100,935		409,920		115,837		100,228		526,464		626,692		149,944	1984-1989	2002	(4)
			2001 Jefferson Davis Highway,
			2100/2200 Crystal Drive, 223 23rd
			Street, 2221 South Clark Street, Crystal
			City Shops at 2100, 220 20th Street			75,037		57,213		131,206		186,549		57,070		317,898		374,968		68,079	1964-1969	2002	(4)
			1550-1750 Crystal Drive/
			241-251 18th Street			121,067		64,817		218,330		58,625		64,652		277,120		341,772		85,657	1974-1980	2002	(4)
			Riverhouse Apartments			259,546		118,421		125,078		57,582		138,696		162,385		301,081		19,248		2007	(4)
			Skyline Place (6 buildings)			442,500		41,986		221,869		27,343		41,862		249,336		291,198		67,946	1973-1984	2002	(4)
			1215, 1225 S. Clark Street/ 200, 201
			12th Street S.			90,191		47,594		177,373		27,015		47,465		204,517		251,982		59,451	1983-1987	2002	(4)

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(Amounts in thousands)
COLUMN A						COLUMN B		COLUMN C			COLUMN D	COLUMN E						COLUMN F	COLUMN G	COLUMN H	COLUMN I
												Gross amount at which									Life on which
							Initial cost to company (1)					carried at close of period									depreciation
											Costs						Accumulated				in latest
									Building		capitalized		Buildings				depreciation				income
									and		subsequent		and				and		Date of	Date	statement
Description					Encumbrances		Land		improvements		to acquisition	Land	improvements		Total (2)		amortization		construction (3)	acquired	is computed
			1800, 1851 and 1901 South Bell Street			-		37,551		118,806	32,899	37,551		151,705		189,256		66,789	1968	2002	(4)
			1229-1231 25th Street (West End 25)			101,671		67,049		5,039	105,574	68,198		109,464		177,662		5,851		2007	(4)
			2101 L Street			150,000		32,815		51,642	82,632	39,768		127,321		167,089		16,783	1975	2003	(4)
			2200 / 2300 Clarendon Blvd			53,344		-		105,475	29,342	-		134,817		134,817		38,724	1988-1989	2002	(4)
			Bowen Building - 875 15th Street, NW			115,022		30,077		98,962	1,287	30,176		100,150		130,326		16,584	2004	2005	(4)
			1875 Connecticut Ave, NW			49,433		36,303		82,004	3,459	35,886		85,880		121,766		13,104	1963	2007	(4)
			One Skyline Tower			134,700		12,266		75,343	32,911	12,231		108,289		120,520		27,483	1988	2002	(4)
			Reston Executive			93,000		15,424		85,722	9,084	15,380		94,850		110,230		27,272	1987-1989	2002	(4)
			H Street - North 10-1D Land Parcel			-		104,473		55	(11,356)	87,666		5,506		93,172		-		2007	(4)
			409 3rd Street			-		10,719		69,658	5,826	10,719		75,484		86,203		26,065	1990	1998	(4)
			1825 Connecticut Ave, NW			48,806		33,090		61,316	(5,595)	32,726		56,085		88,811		8,613	1956	2007	(4)
			Warehouses			-		106,946		1,326	(22,901)	83,400		1,971		85,371		1,333		2007	(4)
			Commerce Executive			-		13,401		58,705	13,422	13,363		72,165		85,528		20,285	1985-1989	2002	(4)
			1235 S. Clark Street			51,309		15,826		53,894	14,959	15,826		68,853		84,679		16,722	1981	2002	(4)
			Seven Skyline Place			100,800		10,292		58,351	(6,499)	10,262		51,882		62,144		13,792	2001	2002	(4)
			1150 17th Street			28,728		23,359		24,876	14,551	24,723		38,063		62,786		12,237	1970	2002	(4)
			Crystal City Hotel			-		8,000		47,191	7,176	8,000		54,367		62,367		9,602	1968	2004	(4)
			1750 Pennsylvania Avenue			44,330		20,020		30,032	256	21,170		29,138		50,308		7,656	1964	2002	(4)
			1730 M Street			14,853		10,095		17,541	9,449	10,687		26,398		37,085		8,457	1963	2002	(4)
			Democracy Plaza One			-		-		33,628	(1,366)	-		32,262		32,262		12,459	1987	2002	(4)
			1726 M Street			-		9,450		22,062	2,539	9,455		24,596		34,051		3,391	1964	2006	(4)
			Crystal Drive Retail			-		-		20,465	5,799	-		26,264		26,264		8,011	2004	2004	(4)
			1109 South Capitol Street			-		11,541		178	4	11,597		126		11,723		178		2007	(4)
			South Capitol			-		4,009		6,273	(2,753)	-		7,529		7,529		-		2005	(4)
			H Street			-		1,763		641	41	1,763		682		2,445		108		2005	(4)
			1399 New York Avenue, NW			-		33,481		67,363	-	33,481		67,363		100,844		-		2011	(4)
			Other			-		-		51,767	(42,015)	-		9,752		9,752		-
				Total Washington, DC		2,248,642		1,078,916		2,532,091	751,676	1,064,001		3,298,682		4,362,683		811,824

		New Jersey
			Paramus			-		-		-	23,785	1,033		22,752		23,785		14,279	1967	1987	(4)

		California
			555 California Street			600,000		221,903		893,324	38,055	221,903		931,379		1,153,282		118,824	1922/1969/1970	2007	(4)

	Total Office Buildings					5,525,863		2,718,833		6,533,493	1,797,344	2,740,131		8,309,539		11,049,670		1,988,834

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(Amounts in thousands)
COLUMN A						COLUMN B		COLUMN C			COLUMN D	COLUMN E						COLUMN F	COLUMN G	COLUMN H	COLUMN I
												Gross amount at which									Life on which
							Initial cost to company (1)					carried at close of period									depreciation
											Costs						Accumulated				in latest
									Building		capitalized		Buildings				depreciation				income
									and		subsequent		and				and		Date of	Date	statement
Description					Encumbrances		Land		improvements		to acquisition	Land	improvements		Total (2)		amortization		construction (3)	acquired	is computed
	Shopping Centers
		California
			Los Angeles (Beverly Connection)			100,000		72,996		131,510	21,592	72,996		153,102		226,098		18,335	2008	2005	(4)
			San Jose			112,476		42,836		104,262	329	42,836		104,591		147,427		3,584	2008	2010	(4)
			Walnut Creek (1149 S. Main St)			-		2,699		19,930	-	2,699		19,930		22,629		3,066		2006	(4)
			Pasadena			-		-		18,337	747	-		19,084		19,084		2,361		2007	(4)
			San Francisco (Geary Blvd)			-		11,857		4,444	27	11,857		4,471		16,328		693		2006	(4)
			Signal Hill			-		9,652		2,940	1	9,652		2,941		12,593		386		2006	(4)
			Walnut Creek (1556 Mount Diablo Blvd)			-		5,909		-	1,057	5,908		1,058		6,966		-		2007	(4)
			Redding			-		2,900		2,857	483	2,900		3,340		6,240		420		2006	(4)
			Merced			-		1,725		1,907	215	1,725		2,122		3,847		368		2006	(4)
			San Bernadino (1522 E. Highland Ave)			-		1,651		1,810	-	1,651		1,810		3,461		336		2004	(4)
			Corona			-		-		3,073	-	-		3,073		3,073		570		2004	(4)
			Vallejo			-		-		2,945	-	-		2,945		2,945		384		2006	(4)
			San Bernadino (648 W. 4th St)			-		1,597		1,119	-	1,597		1,119		2,716		208		2004	(4)
			Mojave			-		-		2,250	-	-		2,250		2,250		417		2004	(4)
			Barstow			-		856		1,367	-	856		1,367		2,223		254		2004	(4)
			Colton (1904 North Rancho Avenue)			-		1,239		954	-	1,239		954		2,193		177		2004	(4)
			Moreno Valley			-		639		1,156	-	639		1,156		1,795		214		2004	(4)
			Rialto			-		434		1,173	-	434		1,173		1,607		217		2004	(4)
			Desert Hot Springs			-		197		1,355	-	197		1,355		1,552		251		2004	(4)
			Yucaipa			-		663		426	-	663		426		1,089		79		2004	(4)
			Riverside (5571 Mission Blvd)			-		209		704	-	209		704		913		131		2004	(4)
				Total California		212,476		158,059		304,519	24,451	158,058		328,971		487,029		32,451

		Connecticut
			Waterbury			14,501		667		4,504	4,852	667		9,356		10,023		5,669	1969	1969	(4)
			Newington			11,657		2,421		1,200	951	2,421		2,151		4,572		732	1965	1965	(4)
				Total Connecticut		26,158		3,088		5,704	5,803	3,088		11,507		14,595		6,401

		Florida
			Tampa (Hyde Park Village)			19,876		8,000		23,293	12,494	8,000		35,787		43,787		5,823		2005	(4)
			Tampa (1702 North Dale Mabry)			-		3,651		2,388	2,134	3,650		4,523		8,173		569		2006	(4)
				Total Florida		19,876		11,651		25,681	14,628	11,650		40,310		51,960		6,392

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(Amounts in thousands)
COLUMN A					COLUMN B		COLUMN C			COLUMN D	COLUMN E						COLUMN F	COLUMN G	COLUMN H	COLUMN I
											Gross amount at which									Life on which
						Initial cost to company (1)					carried at close of period									depreciation
										Costs						Accumulated				in latest
								Building		capitalized		Buildings				depreciation				income
								and		subsequent		and				and		Date of	Date	statement
Description				Encumbrances		Land		improvements		to acquisition	Land	improvements		Total (2)		amortization		construction (3)	acquired	is computed
	Illinois
		Lansing			-		2,135		1,064	71	2,135		1,135		3,270		145		2006	(4)

	Iowa
		Dubuque			-		-		1,479	-	-		1,479		1,479		193		2006	(4)

	Maryland
		Rockville			-		3,470		20,599	100	3,470		20,699		24,169		3,517		2005	(4)
		Baltimore (Towson)			16,207		581		3,227	8,682	581		11,909		12,490		4,390	1968	1968	(4)
		Annapolis			-		-		9,652	-	-		9,652		9,652		2,203		2005	(4)
		Wheaton			-		-		5,367	-	-		5,367		5,367		704		2006	(4)
		Glen Burnie			-		462		2,571	586	462		3,157		3,619		2,703	1958	1958	(4)
			Total Maryland		16,207		4,513		41,416	9,368	4,513		50,784		55,297		13,517

	Massachusetts
		Dorchester			-		12,844		3,794	(3)	12,841		3,794		16,635		498		2006	(4)
		Springfield			5,942		2,797		2,471	578	2,797		3,049		5,846		740	1993	1966	(4)
		Chicopee			8,615		895		-	-	895		-		895		-	1969	1969	(4)
		Cambridge			-		-		-	260	-		260		260		94
			Total Massachusetts		14,557		16,536		6,265	835	16,533		7,103		23,636		1,332

	Michigan
		Roseville			-		30		6,128	1,465	30		7,593		7,623		1,787		2005	(4)
		Battle Creek			-		1,264		2,144	(2,443)	264		701		965		92		2006	(4)
		Midland			-		-		133	86	-		219		219		72		2006	(4)
			Total Michigan		-		1,294		8,405	(892)	294		8,513		8,807		1,951

	New Hampshire
		Salem			-		6,083		-	-	6,083		-		6,083		-		2006	(4)

	New Jersey
		Paramus (Bergen Town Center)			283,590		19,884		81,723	366,325	37,635		430,297		467,932		42,648	1957/2009	2003	(4)
		North Bergen (Tonnelle Ave)			75,000		24,493		-	63,376	31,806		56,063		87,869		4,324	2009	2006	(4)
		Union (Springfield Avenue)			29,570		19,700		45,090	-	19,700		45,090		64,790		5,166		2007	(4)
		East Rutherford			14,103		-		36,727	(1)	-		36,726		36,726		3,177	2007	2007	(4)
		East Hanover I and II			44,412		2,232		18,241	10,376	2,671		28,178		30,849		13,166	1962	1962/1998	(4)
		Garfield			-		45		8,068	20,798	45		28,866		28,911		2,513	2009	1998	(4)
		Lodi (Washington Street)			9,422		7,606		13,125	275	7,606		13,400		21,006		2,351		2004	(4)
		Englewood			12,077		2,300		17,245	17	2,300		17,262		19,562		1,978		2007	(4)
		Bricktown			33,153		1,391		11,179	6,154	1,391		17,333		18,724		10,383	1968	1968	(4)
		Totowa			25,703		1,102		11,994	4,617	1,099		16,614		17,713		11,445	1957/1999	1957	(4)
		Hazlet			-		7,400		9,413	-	7,400		9,413		16,813		1,078		2007	(4)
		Carlstadt			7,304		-		16,457	12	-		16,469		16,469		1,720		2007	(4)

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(Amounts in thousands)
COLUMN A					COLUMN B		COLUMN C			COLUMN D	COLUMN E						COLUMN F	COLUMN G	COLUMN H	COLUMN I
											Gross amount at which									Life on which
						Initial cost to company (1)					carried at close of period									depreciation
										Costs						Accumulated				in latest
								Building		capitalized		Buildings				depreciation				income
								and		subsequent		and				and		Date of	Date	statement
Description				Encumbrances		Land		improvements		to acquisition	Land	improvements		Total (2)		amortization		construction (3)	acquired	is computed
		North Plainfield			-		500		13,983	1,380	500		15,363		15,863		10,714	1955	1989	(4)
		East Brunswick II (339-341 Route 18 S.)			12,226		2,098		10,949	2,826	2,098		13,775		15,873		8,138	1972	1972	(4)
		Manalapan			21,836		725		7,189	7,791	1,046		14,659		15,705		10,027	1971	1971	(4)
		Marlton			17,913		1,611		3,464	10,398	1,611		13,862		15,473		6,600	1973	1973	(4)
		Union (Route 22 and Morris Ave)			33,551		3,025		7,470	1,813	3,025		9,283		12,308		4,492	1962	1962	(4)
		Hackensack			42,082		692		10,219	1,250	692		11,469		12,161		8,713	1963	1963	(4)
		Wayne Towne Center			-		-		26,137	2,782	-		28,919		28,919		785	0	2010	(4)
		Watchung			15,638		4,178		5,463	1,545	4,441		6,745		11,186		3,396	1994	1959	(4)
		South Plainfield			5,317		-		10,044	389	-		10,433		10,433		1,175		2007	(4)
		Eatontown			-		4,653		4,999	357	4,653		5,356		10,009		897		2005	(4)
		Cherry Hill			14,387		5,864		2,694	1,828	4,864		5,522		10,386		3,864	1964	1964	(4)
		Dover			13,648		559		6,363	2,955	559		9,318		9,877		5,782	1964	1964	(4)
		Lodi (Route 17 N.)			11,771		238		9,446	-	238		9,446		9,684		2,891	1999	1975	(4)
		East Brunswick I (325-333 Route 18 S.)			25,817		319		6,220	2,764	319		8,984		9,303		8,556	1957	1957	(4)
		Jersey City			21,040		652		7,495	325	652		7,820		8,472		2,265	1965	1965	(4)
		Morris Plains			22,178		1,104		6,411	882	1,104		7,293		8,397		6,565	1961	1985	(4)
		Middletown			18,026		283		5,248	1,607	283		6,855		7,138		5,001	1963	1963	(4)
		Woodbridge			21,438		1,509		2,675	1,780	1,539		4,425		5,964		2,396	1959	1959	(4)
		Delran			-		756		4,468	734	756		5,202		5,958		5,026	1972	1972	(4)
		Lawnside			11,089		851		3,164	1,269	851		4,433		5,284		3,987	1969	1969	(4)
		Kearny			-		309		3,376	1,212	309		4,588		4,897		3,260	1938	1959	(4)
		Bordentown			-		498		3,176	1,141	717		4,098		4,815		4,018	1958	1958	(4)
		Turnersville			-		900		1,342	853	900		2,195		3,095		2,127	1974	1974	(4)
		North Bergen (Kennedy Blvd)			5,289		2,308		636	34	2,308		670		2,978		403	1993	1959	(4)
		Montclair			2,730		66		419	381	66		800		866		664	1972	1972	(4)
			Total New Jersey		850,310		119,851		432,312	520,245	145,184		927,224		1,072,408		211,691

	New York
		Valley Stream (Green Acres Mall)			325,045		147,172		134,980	59,161	146,968		194,345		341,313		51,397	1956	1997	(4)
		Bronx (Bruckner Blvd)			-		66,100		259,503	336	66,100		259,839		325,939		32,467		2007	(4)
		Hicksville (Broadway Mall)			87,750		126,324		48,904	7,216	126,324		56,120		182,444		8,327		2005	(4)
		Poughkeepsie			-		12,733		12,026	37,119	12,780		49,098		61,878		4,852	2009	2005	(4)
		Huntington			17,287		21,200		33,667	166	21,200		33,833		55,033		3,524		2007	(4)
		Mt. Kisco			29,026		22,700		26,700	386	23,297		26,489		49,786		2,700		2007	(4)
		Bronx (1750-1780 Gun Hill Road)			-		6,427		11,885	18,012	6,428		29,896		36,324		2,266	2009	2005	(4)
		Staten Island			17,237		11,446		21,262	300	11,446		21,562		33,008		4,341		2004	(4)
		Inwood			-		12,419		19,097	521	12,419		19,618		32,037		3,400		2004	(4)
		Queens (99-01 Queens Blvd)			-		7,839		20,392	2,104	7,839		22,496		30,335		4,291		2004	(4)
		West Babylon			-		6,720		13,786	70	6,720		13,856		20,576		1,658		2007	(4)
		Freeport (437 E. Sunrise Highway)			22,178		1,231		4,747	1,421	1,231		6,168		7,399		4,882	1981	1981	(4)
		Dewitt			-		-		7,116	-	-		7,116		7,116		925		2006	(4)
		Buffalo (Amherst)			-		5,743		4,056	1,825	5,107		6,517		11,624		4,455	1968	1968	(4)
		Oceanside			-		2,710		2,306	-	2,710		2,306		5,016		264		2007	(4)

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(Amounts in thousands)
COLUMN A					COLUMN B		COLUMN C			COLUMN D	COLUMN E						COLUMN F	COLUMN G	COLUMN H	COLUMN I
											Gross amount at which									Life on which
						Initial cost to company (1)					carried at close of period									depreciation
										Costs						Accumulated				in latest
								Building		capitalized		Buildings				depreciation				income
								and		subsequent		and				and		Date of	Date	statement
Description				Encumbrances		Land		improvements		to acquisition	Land	improvements		Total (2)		amortization		construction (3)	acquired	is computed
		Albany (Menands)			-		460		2,091	2,356	460		4,447		4,907		3,395	1965	1965	(4)
		Rochester (Henrietta)			-		-		2,647	1,205	-		3,852		3,852		3,512	1971	1971	(4)
		Rochester			4,549		2,172		-	-	2,172		-		2,172		-	1966	1966	(4)
		Freeport (240 West Sunrise Highway)			-		-		-	260	-		260		260		84		2005	(4)
		Commack			-		-		43	236	-		279		279		4		2006	(4)
		New Hyde Park			-		-		4	-	-		4		4		4	1970	1976	(4)
	Manhattan
		1540 Broadway			-		105,914		214,208	18,061	105,914		232,269		338,183		16,679		2006	(4)
		Manhattan Mall			72,639		88,595		113,473	73,376	88,595		186,849		275,444		26,120	2009	2007	(4)
		828-850 Madison Avenue			80,000		107,937		28,261	10	107,937		28,271		136,208		4,711		2005	(4)
		4 Union Square South			75,000		24,079		55,220	620	24,079		55,840		79,919		10,732	1965/2004	1993	(4)
		478-482 Broadway			-		20,000		13,375	27,574	20,000		40,949		60,949		3,370	2009	2007	(4)
		510 5th Avenue			31,732		34,602		18,728	10,516	34,602		29,244		63,846		687		2010	(4)
		40 East 66th Street			-		13,616		34,635	121	13,616		34,756		48,372		5,177		2005	(4)
		155 Spring Street			-		13,700		30,544	2,153	13,700		32,697		46,397		3,881		2007	(4)
		334 Canal Street			-		1,693		6,507	-	1,693		6,507		8,200		-		2011	(4)
		435 7th Avenue			51,353		19,893		19,091	37	19,893		19,128		39,021		4,511	2002	1997	(4)
		692 Broadway			-		6,053		22,908	2,586	6,053		25,494		31,547		3,895		2005	(4)
		715 Lexington Avenue			-		-		26,903	-	-		26,903		26,903		4,484	1923	2001	(4)
		677-679 Madison Avenue			-		13,070		9,640	361	13,070		10,001		23,071		1,378		2006	(4)
		431 7th Avenue			-		16,700		2,751	-	16,700		2,751		19,451		327		2007	(4)
		484-486 Broadway			-		10,000		6,688	4,079	10,000		10,767		20,767		853	2009	2007	(4)
		1135 Third Avenue			-		7,844		7,844	-	7,844		7,844		15,688		2,745		1997	(4)
		148 Spring Street			-		3,200		8,112	112	3,200		8,224		11,424		737		2008	(4)
		150 Spring Street			-		3,200		5,822	137	3,200		5,959		9,159		547		2008	(4)
		488 8th Avenue			-		10,650		1,767	(4,674)	6,859		884		7,743		82		2007	(4)
		484 8th Avenue			-		3,856		762	-	3,856		762		4,618		284		1997	(4)
		825 7th Avenue			-		1,483		697	33	1,483		730		2,213		261		1997	(4)
			Total New York		813,796		959,481		1,253,148	267,796	955,495		1,524,930		2,480,425		228,209

	Pennsylvania
		Wilkes-Barre			20,475		6,053		26,646	371	6,053		27,017		33,070		2,738		2007	(4)
		Philadelphia			-		933		23,650	6,244	933		29,894		30,827		9,130	1977	1994	(4)
		Allentown			31,106		187		15,580	330	187		15,910		16,097		11,995	1957	1957	(4)
		Bensalem			15,439		2,727		6,698	1,858	2,727		8,556		11,283		3,049	1972/1999	1972	(4)
		Bethlehem			5,800		827		5,200	347	839		5,535		6,374		5,483	1966	1966	(4)
		Wyomissing			-		-		2,646	2,393	-		5,039		5,039		2,492		2005	(4)
		York			5,402		409		2,568	1,811	409		4,379		4,788		3,713	1970	1970	(4)
		Broomall			11,089		850		2,171	786	850		2,957		3,807		2,829	1966	1966	(4)

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(Amounts in thousands)
COLUMN A						COLUMN B		COLUMN C			COLUMN D	COLUMN E						COLUMN F	COLUMN G	COLUMN H	COLUMN I
												Gross amount at which									Life on which
							Initial cost to company (1)					carried at close of period									depreciation
											Costs						Accumulated				in latest
									Building		capitalized		Buildings				depreciation				income
									and		subsequent		and				and		Date of	Date	statement
Description					Encumbrances		Land		improvements		to acquisition	Land	improvements		Total (2)		amortization		construction (3)	acquired	is computed
			Lancaster			5,601		3,140		63	543	3,140		606		3,746		412	1966	1966	(4)
			Upper Moreland			-		683		1,868	900	683		2,768		3,451		2,661	1974	1974	(4)
			Glenolden			7,108		850		1,820	826	850		2,646		3,496		1,869	1975	1975	(4)
			Levittown			-		183		1,008	364	183		1,372		1,555		1,370	1964	1964	(4)
			Springfield			-		-		-	123	-		123		123		-		2005	(4)
				Total Pennsylvania		102,020		16,842		89,918	16,896	16,854		106,802		123,656		47,741

		South Carolina
			Charleston			-		-		3,634	-	-		3,634		3,634		477		2006	(4)

		Tennessee
			Antioch			-		1,521		2,386	-	1,521		2,386		3,907		313		2006	(4)

		Texas
			Texarkana			-		-		458	33	-		491		491		66		2006	(4)

		Virginia
			Springfield (Springfield Mall)			-		49,516		265,964	(42,815)	49,516		223,149		272,665		33,751		2006	(4)
			Norfolk			-		-		3,927	15	-		3,942		3,942		2,284		2005	(4)
				Total Virginia		-		49,516		269,891	(42,800)	49,516		227,091		276,607		36,035

		Washington
			Bellingham			-		1,831		2,136	(1,670)	922		1,375		2,297		126		2005	(4)

		Washington, DC
			3040 M Street			-		7,830		27,490	45	7,830		27,535		35,365		4,118		2006	(4)

		Wisconsin
			Fond Du Lac			-		-		174	102	-		276		276		64		2006	(4)

		Puerto Rico
			Las Catalinas			55,912		15,280		64,370	8,091	15,280		72,461		87,741		24,511	1996	2002	(4)
			Montehiedra			120,000		9,182		66,751	5,023	9,267		71,689		80,956		26,114	1996	1997	(4)
				Total Puerto Rico		175,912		24,462		131,121	13,114	24,547		144,150		168,697		50,625

		Other				-		-		-	5,364	-		5,364		5,364		101			(4)

	Total Retail Properties					2,231,312		1,384,693		2,607,201	833,389	1,404,223		3,421,060		4,825,283		641,948

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(Amounts in thousands)
COLUMN A						COLUMN B		COLUMN C				COLUMN D		COLUMN E						COLUMN F	COLUMN G	COLUMN H	COLUMN I
														Gross amount at which									Life on which
							Initial cost to company (1)							carried at close of period									depreciation
												Costs							Accumulated				in latest
									Building			capitalized			Buildings				depreciation				income
									and			subsequent			and				and		Date of	Date	statement
Description					Encumbrances		Land		improvements			to acquisition		Land	improvements		Total (2)		amortization		construction (3)	acquired	is computed
	Merchandise Mart Properties
		Illinois
			Merchandise Mart, Chicago			550,000		64,528		319,146		166,115		64,535		485,254		549,789		158,615	1930	1998	(4)
			527 W. Kinzie, Chicago			-		5,166		-		-		5,166		-		5,166		-
				Total Illinois		550,000		69,694		319,146		166,115		69,701		485,254		554,955		158,615

		Washington, DC
			Washington Design Center			-		12,274		40,662		12,888		12,274		53,550		65,824		17,579	1919	1998	(4)

		New York
			7 West 34th Street			-		34,614		94,167		35,886		34,614		130,053		164,667		34,132	1901	2000	(4)
			MMPI Piers			-		-		-		9,897		-		9,897		9,897		243		2008	(4)
				Total New York		-		34,614		94,167		45,783		34,614		139,950		174,564		34,375

		Massachusetts
			Boston Design Center			67,350		-		93,915		(15,552)		-		78,363		78,363		16,411	1918	2005	(4)

		California
			L.A. Mart, Los Angeles			-		10,141		43,422		17,217		10,141		60,639		70,780		17,135	1958	2000	(4)

	Total Merchandise Mart					617,350		126,723		591,312		226,451		126,730		817,756		944,486		244,115

	Warehouse/Industrial
		New Jersey
			East Hanover			-		576		7,752		7,879		691		15,516		16,207		13,755	1972	1972	(4)
			Edison			-		-		-		4,903		704		4,199		4,903		4,179	1962	1962	(4)
				Total Warehouse/Industrial		-		576		7,752		12,782		1,395		19,715		21,110		17,934

	Other Properties
			Hotel Pennsylvania			-		29,904		121,712		74,238		29,904		195,950		225,854		68,427	1919	1997	(4)
			220 Central Park South			123,750		115,720		16,420		112,447		115,720		128,867		244,587		20,119		2005	(4)
			Wasserman			-		28,052		-		34,927		40,237		22,742		62,979		11,818		2005	(4)
			40 East 66th Residential			-		29,199		85,798		(77,583)		14,540		22,874		37,414		3,184		2005	(4)
			677-679 Madison			-		1,462		1,058		1,294		2,212		1,602		3,814		205		2006	(4)
			Atlantic City, NJ			60,000		83,089		7		(3)		83,089		4		83,093		-		2010	(4)
			Other			-		-		-		70		-		70		70		-
	Total Other Properties					183,750		287,426		224,995		145,390		285,702		372,109		657,811		103,753

	Leasehold Improvements
		Equipment and Other				-		-		-		128,651		-		128,651		128,651		98,453
		Total December 31, 2011			$	8,558,275	$	4,518,251	$	9,964,753	$	3,144,007	$	4,558,181	$	13,068,830	$	17,627,011	$	3,095,037

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION

Notes:

(1)		Initial cost is cost as of January 30, 1982 (the date on which Vornado commenced real estate operations) unless acquired subsequent to that date see Column H.
(2)		The net basis of the Company’s assets and liabilities for tax purposes is approximately $3.6 billion lower than the amount reported for financial statement purposes.
(3)		Date of original construction –– many properties have had substantial renovation or additional construction –– see Column D.
(4)		Depreciation of the buildings and improvements are calculated over lives ranging from the life of the lease to forty years.

VORNADO REALTY TRUST
SCHEDULE III
REAL ESTATE AND ACCUMULATED DEPRECIATION
(AMOUNTS IN THOUSANDS)

The following is a reconciliation of real estate assets and accumulated depreciation:

				Year Ended December 31,
				2011		2010		2009
	Real Estate
		Balance at beginning of period		$	17,387,701	$	17,293,970	$	17,140,726
		Additions during the period:
			Land		33,481		347,345		-
			Buildings & improvements		315,762		324,114		601,136
					17,736,944		17,965,429		1,741,862
		Less: Assets sold and written-off			109,933		577,728		447,892
		Balance at end of period		$	17,627,011	$	17,387,701	$	17,293,970

	Accumulated Depreciation
		Balance at beginning of period		$	2,715,046	$	2,395,608	$	2,068,357
		Additions charged to operating expenses			452,793		428,788		433,785
					3,167,839		2,824,396		2,502,142
		Less: Accumulated depreciation on assets
			sold and written-off		72,802		109,350		106,534
		Balance at end of period		$	3,095,037	$	2,715,046	$	2,395,608

- Definition

The entire disclosure for real estate and accumulated depreciation. This may include a schedule that describes the property and lists the initial cost of land, buildings and improvements, improvements and carrying costs capitalized after acquisition, and the total carrying cost for land, buildings and improvements for each property and in aggregate. The schedule also lists the accumulated depreciation for each property and in aggregate, the date each property was constructed and acquired, the useful life used to calculate depreciation and any encumbrances on the properties. The entity provides a reconciliation of the carrying amount of real estate from the beginning of the period to the end of the period. Any real estate investments that have been written down or reserved against are described, including the basis of the write-down. A material amount of intercompany profit in the total carrying amount of real estate is disclosed. The aggregate cost of all real estate investments for federal income tax purposes is also disclosed.

+ References + Details

Basis of Presentation and Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2011
Basis of Presentation and Significant Accounting Policies [Abstract]
Basis of Presentation Policy	Basis of Presentation The accompanying consolidated financial statements include the accounts of Vornado and the Operating Partnership. All significant inter-company amounts have been eliminated. We account for unconsolidated partially owned entities on the equity method of accounting. Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America, which require us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.
Real Estate [Policy Text Block]	Real Estate: Real estate is carried at cost, net of accumulated depreciation and amortization. Betterments, major renewals and certain costs directly related to the improvement and leasing of real estate are capitalized. Maintenance and repairs are expensed as incurred. For redevelopment of existing operating properties, the net book value of the existing property under redevelopment plus the cost for the construction and improvements incurred in connection with the redevelopment are capitalized to the extent the capitalized costs of the property do not exceed the estimated fair value of the redeveloped property when complete. If the cost of the redeveloped property, including the undepreciated net book value of the property carried forward, exceeds the estimated fair value of redeveloped property, the excess is charged to expense. Depreciation is provided on a straight-line basis over estimated useful lives which range from 7 to 40 years. Tenant allowances are amortized on a straight-line basis over the lives of the related leases, which approximate the useful lives of the assets. Additions to real estate include interest expense capitalized during construction of $1,197,000 and $864,000 for the years ended December 31, 2011 and 2010, respectively. 2. Basis of Presentation and Significant Accounting Policies- continued Upon the acquisition of real estate, we assess the fair value of acquired assets (including land, buildings and improvements, identified intangibles, such as acquired above and below-market leases and acquired in-place leases and tenant relationships) and acquired liabilities and we allocate the purchase price based on these assessments. We assess fair value based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including historical operating results, known trends, and market/economic conditions. Our properties, including any related intangible assets, are individually reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment exists when the carrying amount of an asset exceeds the aggregate projected future cash flows over the anticipated holding period on an undiscounted basis. An impairment loss is measured based on the excess of the property's carrying amount over its estimated fair value. Impairment analyses are based on our current plans, intended holding periods and available market information at the time the analyses are prepared. If our estimates of the projected future cash flows, anticipated holding periods, or market conditions change, our evaluation of impairment losses may be different and such differences could be material to our consolidated financial statements. The evaluation of anticipated cash flows is subjective and is based, in part, on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results. Plans to hold properties over longer periods decrease the likelihood of recording impairment losses.
Partially Owned Entities [Policy Text Block]	Partially Owned Entities: In determining whether we have a controlling interest in a partially owned entity and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, authority to make decisions, and contractual and substantive participating rights of the partners/members as well as whether the entity is a variable interest entity in which we have power over significant activities of the entity and the obligation to absorb losses or receive benefits that could potentially be significant to the entity. We have concluded that we do not control a partially owned entity if the entity is not considered a variable interest entity and the approval of all of the partners/members is contractually required with respect to major decisions, such as operating and capital budgets, the sale, exchange or other disposition of real property, the hiring of a chief executive officer, the commencement, compromise or settlement of any lawsuit, legal proceeding or arbitration or the placement of new or additional financing secured by assets of the venture. We account for investments on the equity method when the requirements for consolidation are not met, and we have significant influence over the operations of the investee. Equity method investments are initially recorded at cost and subsequently adjusted for our share of net income or loss and cash contributions and distributions each period. Investments that do not qualify for consolidation or equity method accounting are accounted for on the cost method. Investments in partially owned entities are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment loss is measured based on the excess of the carrying amount of an investment over its estimated fair value. Impairment analyses are based on current plans, intended holding periods and available information at the time the analyses are prepared.
Identified Intangibles [Policy Text Block]	Identified Intangibles: We record acquired intangible assets (including acquired above-market leases, tenant relationships and acquired in-place leases) and acquired intangible liabilities (including below–market leases) at their estimated fair value separate and apart from goodwill. We amortize identified intangibles that have finite lives over the period they are expected to contribute directly or indirectly to the future cash flows of the property or business acquired. Intangible assets that are subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. An impairment loss is measured based on the excess of carrying amount of the identified intangible over its estimated fair value.
Mezzanine Loans Receivable [Policy Text Block]	Mezzanine Loans Receivable: We invest in mezzanine loans of entities that have significant real estate assets. These investments, which are subordinate to the mortgage loans secured by the real property, are generally secured by pledges of the equity interests of the entities owning the underlying real estate. We record these investments at the stated principal amount net of any unamortized discount or premium. We accrete or amortize any discount or premium over the life of the related receivable utilizing the effective interest method or straight-line method, if the result is not materially different. We evaluate the collectibility of both interest and principal of each of our loans whenever events or changes in circumstances indicate such amounts may not be recoverable. A loan is impaired when it is probable that we will be unable to collect all amounts due according to the existing contractual terms. When a loan is impaired, the amount of the loss accrual is calculated by comparing the carrying amount of the investment to the present value of expected future cash flows discounted at the loan's effective interest rate, or as a practical expedient, to the value of the collateral if the loan is collateral dependent. Interest on impaired loans is recognized when received in cash.
Cash And Cash Equivalents [Policy Text Block]	Cash and Cash Equivalents: Cash and cash equivalents consist of highly liquid investments with original maturities of three months or less. The majority of our cash and cash equivalents are held at major commercial banks which may at times exceed the Federal Deposit Insurance Corporation limit.
Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy	Restricted Cash: Restricted cash consists of security deposits, cash restricted in connection with our deferred compensation plan and cash escrowed under loan agreements for debt service, real estate taxes, property insurance and capital improvements.
Share Based Compensation Option And Incentive Plans [Policy Text Block]	Stock-Based Compensation: Stock-based compensation consists of awards to certain employees and officers and consists of stock options, restricted stock, restricted Operating Partnership units and out-performance plan awards. We account for all stock-based compensation in accordance with ASC 718, Compensation – Stock Compensation. Our Share Option Plan (the “Plan”), which was approved in May 2010, provides the Compensation Committee of the Board (the “Committee”) the ability to grant certain of our employees and officers, incentive and non-qualified stock options, stock appreciation rights, performance shares, restricted shares and other stock-based awards and Operating Partnership units, certain of which may provide for dividends or dividend equivalents and voting rights prior to vesting. Awards may be granted up to a maximum of 6,000,000 shares, if all awards granted are Full Value Awards, as defined, and up to 12,000,000 shares, if all of the awards granted are Not Full Value Awards, as defined. Full Value Awards are awards of securities, such as restricted shares, that, if all vesting requirements are met, do not require the payment of an exercise price or strike price to acquire the securities. Not Full Value Awards are awards of securities, such as options, that do require the payment of an exercise price or strike price. This means, for example, if the Committee were to award only restricted shares, it could award up to 6,000,000 restricted shares. On the other hand, if the Committee were to award only stock options, it could award options to purchase up to 12,000,000 shares (at the applicable exercise price). The Committee may also issue any combination of awards under the Plan, with reductions in availability of future awards made in accordance with the above limitations.
Revenue Recognition [Policy Text Block]	Revenue Recognition: We have the following revenue sources and revenue recognition policies: • Base Rent — income arising from tenant leases. These rents are recognized over the non-cancelable term of the related leases on a straight-line basis which includes the effects of rent steps and rent abatements under the leases. We commence rental revenue recognition when the tenant takes possession of the leased space and the leased space is substantially ready for its intended use. In addition, in circumstances where we provide a tenant improvement allowance for improvements that are owned by the tenant, we recognize the allowance as a reduction of rental revenue on a straight-line basis over the term of the lease. • Percentage Rent — income arising from retail tenant leases that is contingent upon tenant sales exceeding defined thresholds. These rents are recognized only after the contingency has been removed (i.e., when tenant sales thresholds have been achieved). • Hotel Revenue — income arising from the operation of the Hotel Pennsylvania which consists of rooms revenue, food and beverage revenue, and banquet revenue. Income is recognized when rooms are occupied. Food and beverage and banquet revenue is recognized when the services have been rendered. • Trade Shows Revenue — income arising from the operation of trade shows, including rentals of booths. This revenue is recognized when the trade shows have occurred. • Expense Reimbursements — revenue arising from tenant leases which provide for the recovery of all or a portion of the operating expenses and real estate taxes of the respective property. This revenue is accrued in the same periods as the expenses are incurred. • Management, Leasing and Other Fees — income arising from contractual agreements with third parties or with partially owned entities. This revenue is recognized as the related services are performed under the respective agreements. • Cleveland Medical Mart — revenue arising from the development of the Cleveland Medical Mart. This revenue is recognized as the related services are performed under the respective agreements using the criteria set forth in ASC 605-25, Multiple Element Arrangements, as we are providing development, marketing, leasing, and other property management services.
Real Estate Held For Development And Sale [Policy Text Block]	Condominium Units Held For Sale: Condominium units held for sale are carried at the lower of cost or fair value less costs to sell. As of December 31, 2011 and 2010, condominiums held for sale, which are included in “other assets” on our consolidated balance sheet, aggregate $60,785,000 and $84,397,000, respectively and consist of substantially completed units at Granite Park in Pasadena, The Bryant in Boston and our 40 East 66th Street property in Manhattan. Revenue from condominium unit sales is recognized upon closing of the sale (the “completed contract method”), as all conditions for full profit recognition have been met at that time. We use the relative sales value method to allocate costs to individual condominium units. Net gains on sales of condominiums units are included in “net gains on disposition of wholly owned and partially owned assets” on our consolidated statements of income. In the years ended December 31, 2010 and 2009, we recognized non-cash impairment losses related to certain of these condominiums aggregating $30,013,000 and $13,667,000, respectively, based on our assessments of the expected net sales proceeds associated with these condominium projects. These losses are included in “tenant buy-outs, impairment losses and other acquisition related costs” on our consolidated statements of income.
Derivatives, Policy [Policy Text Block]	Derivative Instruments and Hedging Activities: ASC 815, Derivatives and Hedging, as amended, establishes accounting and reporting standards for derivative instruments, including certain derivative instruments embedded in other contracts, and for hedging activities. As of December 31, 2011 and 2010, our derivative instruments consisted primarily of a portion of our investment in J.C. Penney common shares (see Note 4 – Marketable Securities and Derivative Instruments) and interest rate swaps. We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. For derivatives designated as fair value hedges, changes in the fair value of the derivative and the hedged item related to the hedged risk are recognized in earnings. For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income (loss) (outside of earnings) and subsequently reclassified to earnings when the hedged transaction affects earnings, and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. We assess the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative hedging instrument with the changes in fair value or cash flows of the designated hedged item or transaction. For derivatives not designated as hedges, changes in fair value are recognized in earnings.
Income Per Share [Policy Text Block]	Income Per Share: Basic income per share is computed based on weighted average shares outstanding. Diluted income per share considers the effect of all potentially dilutive share equivalents, including outstanding employee stock options, restricted shares and convertible or redeemable securities.
Income Tax [Policy Text Block]	Income Taxes: We operate in a manner intended to enable us to continue to qualify as a REIT under Sections 856-860 of the Internal Revenue Code of 1986, as amended. Under those sections, a REIT which distributes at least 90% of its REIT taxable income as a dividend to its shareholders each year and which meets certain other conditions will not be taxed on that portion of its taxable income which is distributed to its shareholders. We distribute to shareholders 100% of taxable income and therefore, no provision for Federal income taxes is required. Dividends distributed for the year ended December 31, 2011, were characterized, for federal income tax income tax purposes, as 93.2% ordinary income and 6.8% as long term capital gain. Dividend distributions for the year ended December 31, 2010, were characterized, for Federal income tax purposes, as 95.9% ordinary income, 2.8% long-term capital gain and 1.3% return of capital. Dividend distributions for the year ended December 31, 2009 were characterized, for Federal income tax purposes, as 63.9% ordinary income, 0.9% long-term capital gain and 35.2% return of capital. We have elected to treat certain consolidated subsidiaries, and may in the future elect to treat newly formed subsidiaries, as taxable REIT subsidiaries pursuant to an amendment to the Internal Revenue Code that became effective January 1, 2001. Taxable REIT subsidiaries may participate in non-real estate related activities and/or perform non-customary services for tenants and are subject to Federal and State income tax at regular corporate tax rates.
Marketable Securities [Policy Text Block]	Marketable Securities Our portfolio of marketable securities is comprised of debt and equity securities that are classified as available-for-sale. Available-for-sale securities are presented on our consolidated balance sheets at fair value. Gains and losses resulting from the mark-to-market of these securities are included in “other comprehensive income (loss).” Gains and losses are recognized in earnings only upon the sale of the securities and are recorded based on the weighted average cost of such securities. We evaluate our portfolio of marketable securities for impairment each reporting period. For each of the securities in our portfolio with unrealized losses, we review the underlying cause of the decline in value and the estimated recovery period, as well as the severity and duration of the decline. In our evaluation, we consider our ability and intent to hold these investments for a reasonable period of time sufficient for us to recover our cost basis. We also evaluate the near-term prospects for each of these investments in relation to the severity and duration of the decline.
Redeemable Noncontrolling Interests Policy [Text Block]	10. Redeemable Noncontrolling Interests Redeemable noncontrolling interests on our consolidated balance sheets represent Operating Partnership units held by third parties and are comprised of Class A units and Series D-10, D-14, D-15 and D-16 (collectively, “Series D”) cumulative redeemable preferred units. Class A units may be tendered for redemption to the Operating Partnership for cash; we, at our option, may assume that obligation and pay the holder either cash or Vornado common shares on a one-for-one basis. Because the number of Vornado common shares outstanding at all times equals the number of Class A units owned by Vornado, the redemption value of each Class A unit is equivalent to the market value of one Vornado common share, and the quarterly distribution to a Class A unitholder is equal to the quarterly dividend paid to a Vornado common shareholder. Redeemable noncontrolling interests on our consolidated balance sheets are recorded at the greater of their carrying amount or redemption value at the end of each reporting period. Changes in the value from period to period are charged to “additional capital” in our consolidated statements of changes in equity. Redeemable noncontrolling interests exclude our Series G convertible preferred units and Series D-13 cumulative redeemable preferred units, as they are accounted for as liabilities in accordance with ASC 480, Distinguishing Liabilities and Equity, because of their possible settlement by issuing a variable number of Vornado common shares.

Basis of Presentation and Significant Accounting Policies (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2011 USD ($)	Sep. 30, 2011 USD ($)	Jun. 30, 2011 USD ($)	Mar. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Sep. 30, 2010 USD ($)	Jun. 30, 2010 USD ($)	Mar. 31, 2010 USD ($)	Dec. 31, 2011 USD ($) Y	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Property Plant And Equipment Net By Type Abstract
Property Plant And Equipment Useful Life Minimum \| Y									7
Property Plant And Equipment Useful Life Maximum \| Y									40
Interest Costs Capitalized									$ 1,197	$ 864
Property Plant And Equipment [Line Items]
Tenant buy-outs, impairment losses and other acquisition related costs									58,299	129,458	$ 73,763
Identified Intangibles
Identified Intangible Assets, Net	$ 319,704				$ 346,157				319,704	346,157
Identified Intangible Liabilities (included in deferred credit)	467,187				521,372				467,187	521,372
Significant Policies Other Details [Abstract]
Mezzanine Loan Loss Accural Reversal									(72,270)	(53,100)	$ 190,738
Accounts receivable, allowance for doubtful accounts	43,241				62,979				43,241	62,979
Receivables Arising From Straight Lining Of Rents Allowance	4,046				7,316				4,046	7,316
Condominium Assets held for sale	$ 60,785				$ 84,397				$ 60,785	$ 84,397
Tax Treatment Of Dividend [Line Items]
Percent of dividend paid to Shareholders	100.00%				100.00%				100.00%	100.00%	100.00%
Minimum Percentage of Taxable Income Distributed As Dividends	90.00%								90.00%
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Line Items]
NET INCOME attributable to common shareholders	$ 69,508	$ 41,135	$ 91,913	$ 399,215	$ 243,414	$ 95,192	$ 57,840	$ 200,285	$ 601,771	$ 596,731	$ 49,093
Depreciation and Amortization									225,802	216,473	247,023
Mezzanine Loans Receivable									(82,512)	(104,727)	171,380
Straight-line Rent Adjustment									(38,800)	(70,606)	(83,959)
Earnings of Partially Owned Entities									(96,178)	(62,315)	(82,382)
Stock Options									(27,697)	(48,399)	(32,643)
Sale of Real Estate									(18,766)	12,899	3,923
Derivatives									(12,160)	(121,120)	0
Other Adjustments									(6,223)	48,915	81,936
Estimated Taxable Income Net									545,237	467,851	$ 354,371
Income Tax Liability Relating to Taxable REIT Subsidiaries Current	26,645				$ 24,858				$ 26,645	$ 24,858
Explanation Differences Between Book And Tax Basis									The net basis of our assets and liabilities for tax reporting purposes is approximately $3.6 billion lower than its amount reported in our consolidated financial statements
Net Basis Difference Of Assets And Liabilities Between Tax Basis And GAAP Basis	$ 3,600,000								$ 3,600,000
Ordinary Income [Member]
Tax Treatment Of Dividend [Line Items]
Percent of dividend paid to Shareholders	93.20%				95.90%				93.20%	95.90%	63.90%
Long Term Capital Gain [Member]
Tax Treatment Of Dividend [Line Items]
Percent of dividend paid to Shareholders	6.80%				2.80%				6.80%	2.80%	0.90%
Return Of Capital [Member]
Tax Treatment Of Dividend [Line Items]
Percent of dividend paid to Shareholders	0.00%				1.30%				0.00%	1.30%	35.20%
Real Estate [Member]
Property Plant And Equipment [Line Items]
Tenant buy-outs, impairment losses and other acquisition related costs									$ 23,000	$ 92,500	$ 4,789
Cost Of Real Estate Acquisitions Not Consummated [Member]
Property Plant And Equipment [Line Items]
Tenant buy-outs, impairment losses and other acquisition related costs									32,259	6,945	0
Development Related Real Estate [Member]
Property Plant And Equipment [Line Items]
Tenant buy-outs, impairment losses and other acquisition related costs									3,040	0	55,307
Condominium Units [Member]
Property Plant And Equipment [Line Items]
Tenant buy-outs, impairment losses and other acquisition related costs									0	30,013	13,667
Equity Method Investments [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net By Investment Category [Line Items]
Impairment Of Investments net									$ 13,794	$ 11,481	$ 17,820

Vornado Capital Partners Real Estate Fund (the "Fund") (Details) sqft in Thousands, $ in Thousands			2 Months Ended	12 Months Ended
	Dec. 29, 2011 USD ($) sqft	Dec. 16, 2011 USD ($) sqft	Mar. 01, 2011 USD ($) sqft	Dec. 31, 2011 USD ($) Y	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Feb. 28, 2011 USD ($)
Capital Commitments For Real Estate Fund							$ 800,000
Number Of Investments Made By Fund				3
Number Of Investments Exited By The Fund				2
Number Of Investments Held By The Fund				5
Real Estate Fund Nondepreciable Real Estate				$ 346,650	$ 144,423
Real Estate Fund Investment Details [Abstract]
Debt Instruments Interest Rate At Period End				5.00%
Mezzanine loans receivable, net				$ 133,948	202,412
Notes And Loans Payable				8,558,275	8,255,101
Details Of Income From Vornado Capital Partners Lp And Vornado Capital Partners Parallel Lp [Abstract]
Income from Real Estate Fund				22,886	(303)	$ 0
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries				21,786	4,920	(2,839)
Income From Real Estate Fund Attributable To Parent Company				9,288	503	0
Fee and Other Income				150,354	147,358	155,326
Operating Income [Member]
Details Of Income From Vornado Capital Partners Lp And Vornado Capital Partners Parallel Lp [Abstract]
Income from Real Estate Fund				5,500	(303)	0
Realized Gain [Member]
Details Of Income From Vornado Capital Partners Lp And Vornado Capital Partners Parallel Lp [Abstract]
Income from Real Estate Fund				5,391	0	0
Unrealized Gain From Mark To Market [Member]
Details Of Income From Vornado Capital Partners Lp And Vornado Capital Partners Parallel Lp [Abstract]
Income from Real Estate Fund				$ 11,995	0	$ 0
Real Estate Fund [Member]
Term of the Fund, years \| Y				8
Investment period for commitments of the Fund, years \| Y				3
Unfunded Commitments Of Fund				$ 416,600
Real Estate Fund Investment Details [Abstract]
Business Acquisition Cost Of Acquired Entity Purchase Price				248,500
Equity method ownership percentage	38.00%
Details Of Income From Vornado Capital Partners Lp And Vornado Capital Partners Parallel Lp [Abstract]
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries				13,598	(806)
Fee and Other Income				2,695	$ 248
Vornado Realty Trust [Member]
Capital Commitments For Real Estate Fund							$ 200,000
Unfunded Commitments Of Fund				$ 104,150
One Park Avenue [Member] \| Vornado Realty Trust Excluding Real Estate Fund [Member]
Real Estate Fund Investment Details [Abstract]
Equity method ownership percentage			30.30%
One Park Avenue [Member] \| Real Estate Fund [Member]
Real Estate Fund Investment Details [Abstract]
Business Acquisition Cost Of Acquired Entity Purchase Price			$ 374,000
Business Acquisition Cost Of Acquired Entity Cash Paid			137,000
Business Acquisition Cost Of Acquired Entity Liabilities Incurred			$ 250,000
One Park Avenue [Member] \| Real Estate Fund Joint Venture [Member]
Real Estate Fund Investment Details [Abstract]
Equity method ownership percentage			64.70%
One Park Avenue [Member] \| Vornado Realty Trust Real Estate Fund Real Estate Fund Joint Venture [Member]
Real Estate Fund Investment Details [Abstract]
Equity method ownership percentage			95.00%
One Park Avenue [Member] \| Office Building [Member] \| Real Estate Fund [Member]
Real Estate Fund Investment Details [Abstract]
Square Footage Of Real Estate Property \| sqft			932
Crowne Plaza [Member] \| Real Estate Fund [Member]
Real Estate Fund Investment Details [Abstract]
Business Acquisition Cost Of Acquired Entity Cash Paid		$ 31,000
Mezzanine loans receivable, net		34,000
Notes And Loans Payable		259,000
Crowne Plaza [Member] \| Other Partners [Member]
Proceeds From Partnership Contribution		$ 22,000
Crowne Plaza [Member] \| Retail Units [Member] \| Real Estate Fund [Member]
Real Estate Fund Investment Details [Abstract]
Square Footage Of Real Estate Property \| sqft		14
Crowne Plaza [Member] \| Office Building [Member] \| Real Estate Fund [Member]
Real Estate Fund Investment Details [Abstract]
Square Footage Of Real Estate Property \| sqft		212
Crowne Plaza [Member] \| Hotel [Member]
Real Estate Fund Investment Details [Abstract]
Number of Units in Real Estate Property		795
Crowne Plaza [Member] \| Parking Garage [Member]
Real Estate Fund Investment Details [Abstract]
Number of Units in Real Estate Property		159
Property 11th East 68th Street [Member] \| Real Estate Fund [Member]
Real Estate Fund Investment Details [Abstract]
Amount Payable To Joint Venture For Investment	$ 29,300
Mezzanine Loan Provided To Partners	$ 21,000
Mezzanine Loan Provided To Partners Initial Term	3 years
Mezzanine Loan Provided To Partners Extention Term	1 year
Business Acquisition Cost Of Acquired Entity Purchase Price	$ 50,500
Business Acquisition Cost Of Acquired Entity Cash Paid	$ 21,200
Debt Instruments Interest Rate At Period End	15.00%
Property 11th East 68th Street [Member] \| Retail Units [Member]
Real Estate Fund Investment Details [Abstract]
Number of Units in Real Estate Property	2
Property 11th East 68th Street [Member] \| Retail Units [Member] \| Real Estate Fund [Member]
Real Estate Fund Investment Details [Abstract]
Square Footage Of Real Estate Property \| sqft	5

Investments in Partially Owned Entities (Details) $ / shares in Units, sqft in Millions	1 Months Ended		2 Months Ended	3 Months Ended	12 Months Ended
	Aug. 31, 2010 USD ($)	Oct. 31, 2008 USD ($) shares	Sep. 30, 2010 USD ($)	Mar. 16, 2011 USD ($) sqft	Dec. 31, 2011 USD ($) sqft $ / shares shares	Oct. 29, 2011 USD ($)	Sep. 30, 2011 USD ($)	Dec. 31, 2010 USD ($)	Oct. 30, 2010 USD ($)	Sep. 30, 2010 USD ($)	Dec. 31, 2009 USD ($)	Oct. 31, 2009 USD ($)	Sep. 30, 2009 USD ($)	Dec. 16, 2011 USD ($)	Jun. 17, 2011 USD ($)
Condensed Financial Information For Equity Method Investments [Abstract]
Assets					$ 153,861,000,000			$ 165,183,000,000
Liabilities					147,854,000,000			160,203,000,000
Noncontrolling interests					132,000,000			124,000,000
Equity					5,875,000,000			4,856,000,000
Total revenue					15,390,000,000			15,030,000,000			$ 14,321,000,000
Net (loss) income attributable to investee					199,000,000			63,000,000			103,000,000
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities					1,740,459,000			1,375,006,000			1,209,285,000
Net gain on disposition of wholly owned and partially owned assets					15,134,000			81,432,000			5,641,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ 120,310,000			94,062,000			72,390,000
Toys R Us [Member]
Condensed Financial Information For Equity Method Investments [Abstract]
Assets						$ 13,221,000,000			$ 12,810,000,000
Liabilities						11,530,000,000			11,317,000,000
Equity						1,691,000,000			1,493,000,000
Total revenue						13,956,000,000			13,749,000,000			$ 13,172,000,000
Net (loss) income attributable to investee						$ 121,000,000			$ 189,000,000			$ 216,000,000
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					32.70%
Carrying amount of investments in partially owned entities					$ 506,809,000			447,334,000
Equity in net income, before income taxes					38,460,000			16,401,000			58,416,000
Income tax expense					1,132,000			45,418,000			13,185,000
Equity in net income					39,592,000			61,819,000			71,601,000
Interest and other income					$ 8,948,000			9,805,000			6,753,000
Other Financial Data For Equity Method Investments [Abstract]
Toy's fourth quarter fiscal year net income					more than 80%
Investment Advisory Fees	$ 9,600,000
Acquisitions Of Equity Method Investments [Abstract]
Non-cash purchase price accounting adjustments					$ 0			0			13,946,000
Income Loss From Equity Method Investments					48,540,000			71,624,000			92,300,000
Alexanders Inc [Member]
Condensed Financial Information For Equity Method Investments [Abstract]
Assets					1,771,000,000			1,679,000,000
Liabilities					1,408,000,000			1,335,000,000
Noncontrolling interests					4,000,000			3,000,000
Equity					359,000,000			341,000,000
Total revenue					254,000,000			242,000,000			224,000,000
Net (loss) income attributable to investee					$ 79,000,000			67,000,000			132,000,000
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					32.40%
Carrying amount of investments in partially owned entities					$ 189,775,000			186,811,000
Equity in net income before stock appreciation rights					25,013,000			20,059,000			17,991,000
Equity in net income					$ 25,013,000			20,059,000			42,764,000
Other Financial Data For Equity Method Investments [Abstract]
Subsidiary or Equity Method Investee, Price-Per-Share \| $ / shares					$ 370.03
Ownership common shares, investee \| shares					1,654,068
Equity Method Investment Market Value					$ 612,055,000
Excess of investee's fair value over carrying amount					422,280,000
Excess of investee's carrying amount over equity in net assets					$ 59,010,000
Development Fee Percent					6.00%
Development Fee Minimum Guaranteed Amount					$ 750,000
Development fee income					$ 730,000			711,000			2,710,000
Leasing Services Fee Description					leasing services for a fee of 3% of rent for the first ten years of a lease term, 2% of rent for the eleventh through twentieth year of a lease term and 1% of rent for the twenty-first through thirtieth year of a lease term, subject to the payment of rents by Alexander’s tenants. In the event third-party real estate brokers are used, our fee increases by 1% and we are responsible for the fees to the third-parties.
Commission On Asset Sales Description					commission upon the sale of any of Alexander’s assets equal to 3% of gross proceeds, as defined, for asset sales less than $50,000,000, or 1% of gross proceeds, as defined, for asset sales of $50,000,000 or more.
Leasing Services Fee And Commission On Asset Sales Annual Installment Maximum					$ 4,000,000
Other Services Fee Description					Building Maintenance Services (“BMS”), our wholly-owned subsidiary, supervises the cleaning, engineering and security services at Alexander’s 731 Lexington Avenue and Kings Plaza properties for an annual fee of the costs for such services plus 6%.
Fee Income recognized by equity method investees for building maintenance services.					$ 2,970,000			2,775,000			2,552,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ 34,128,000			29,184,000			53,529,000
Property Management Fee Description					equal to the sum of (i) $3,000,000, (ii) 3% of the gross income from the Kings Plaza Regional Shopping Center, (iii) 2% of the gross income from the Rego Park II Shopping Center, (iv) $0.50 per square foot of the tenant-occupied office and retail space at 731 Lexington Avenue, and (v) $256,000, escalating at 3% per annum, for managing the common area of 731 Lexington Avenue.
Unpaid Balance Year End Interest Rate					1.78%
Management and leasing fees					$ 9,115,000			9,125,000			10,765,000
Reversal of stock appreciation rights compensation expense					$ 0			$ 0			$ 24,773,000
Lexington Realty Trust [Member]
Condensed Financial Information For Equity Method Investments [Abstract]
Assets			$ 3,385,000,000				$ 3,164,000,000			$ 3,385,000,000
Liabilities			2,115,000,000				1,888,000,000			2,115,000,000
Noncontrolling interests			71,000,000				59,000,000			71,000,000
Equity			1,199,000,000				1,217,000,000			1,199,000,000
Total revenue							335,000,000			330,000,000			$ 375,000,000
Net (loss) income attributable to investee							(81,000,000)			(90,000,000)			$ (178,000,000)
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					12.00%			12.80%			15.20%
Carrying amount of investments in partially owned entities					$ 57,402,000			$ 57,270,000
Gain on stock issuance					$ 9,760,000			13,710,000
Non-cash impairment charges		$ 107,882,000
Impairment loss											$ 19,121,000
Other Financial Data For Equity Method Investments [Abstract]
Subsidiary or Equity Method Investee, Price-Per-Share \| $ / shares					$ 7.49
Ownership common shares, investee \| shares					18,468,969
Equity Method Investment Market Value					$ 138,333,000
Excess of investee's fair value over carrying amount					80,931,000
Excess of investee's carrying amount over equity in net assets					(49,200,000)
Equity Method Investment Acquisition Of Additional Common Shares \| shares		8,000,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ 8,351,000			11,018,000			(25,665,000)
LNR [Member]
Condensed Financial Information For Equity Method Investments [Abstract]
Assets			143,266,000,000				128,536,000,000			143,266,000,000
Liabilities			142,720,000,000				127,809,000,000			142,720,000,000
Noncontrolling interests			37,000,000				55,000,000			37,000,000
Equity			509,000,000				672,000,000			$ 509,000,000
Total revenue			23,000,000				208,000,000
Net (loss) income attributable to investee			$ 8,000,000				$ 224,000,000
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					26.20%
Carrying amount of investments in partially owned entities					$ 174,408,000			132,973,000
Income tax expense					12,380,000
Tax Adjustments, Settlements, and Unusual Provisions					8,977,000
Net gains from asset sales					6,020,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					58,786,000			1,973,000			0
LNR [Member] \| Consolidated CMBS and CDO trusts [Member]
Condensed Financial Information For Equity Method Investments [Abstract]
Assets					127,000,000,000			142,000,000,000
Liabilities					127,000,000,000			142,000,000,000
India real estate ventures [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities					80,499,000			127,193,000
Impairment loss					13,794,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ (14,881,000)			2,581,000			(1,636,000)
India real estate ventures [Member] \| Range minimum [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					4.00%
India real estate ventures [Member] \| Range maximum [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					36.50%
India real estate ventures [Member] \| Tcg Urban Infrastructure Holdings [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					25.00%
Partially owned office buildings [Member] \| Vornado Realty Trust [Member]
Acquisitions Of Equity Method Investments [Abstract]
Contribution Of Notes Receivable To Joint Venture				$ 73,750,000
Partially owned office buildings [Member] \| 280 Park Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					49.50%
Partially owned office buildings [Member] \| West 57th Street [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					50.00%
Carrying amount of investments in partially owned entities					$ 58,529,000			58,963,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					876,000			(10,990,000)			468,000
Partially owned office buildings [Member] \| Rosslyn Plaza [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities					53,333,000			52,689,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ 2,193,000			(2,419,000)			4,870,000
Partially owned office buildings [Member] \| Rosslyn Plaza [Member] \| Range minimum [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					43.70%
Partially owned office buildings [Member] \| Rosslyn Plaza [Member] \| Range maximum [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					50.40%
Partially owned office buildings [Member] \| One Park Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					30.30%
Carrying amount of investments in partially owned entities					$ 47,568,000			0
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ (1,142,000)			0			0
Partially owned office buildings [Member] \| Warner Building and 1101 17th Street [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					55.00%
Carrying amount of investments in partially owned entities					$ 23,122,000			37,741,000
Straight line rent reserves and write off of tenant improvements					9,022,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					(16,135,000)			72,000			0
Partially owned office buildings [Member] \| Other partially owned office buildings [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities					61,898,000			36,487,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ 10,017,000			4,436,000			4,823,000
Partially owned office buildings [Member] \| 666 Fifth Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					49.50%
Acquisitions Of Equity Method Investments [Abstract]
Square Footage Of Real Estate Property \| sqft					1.4
Existing mortgage loan at time of acquisition														$ 1,215,000,000
A-Note														1,100,000,000
B-Note														115,000,000
Limited recourse and cooperation guarantee					$ 75,000,000
Partially owned office buildings [Member] \| 666 Fifth Avenue [Member] \| Vornado Realty Trust [Member]
Acquisitions Of Equity Method Investments [Abstract]
Lending commitment														80,000,000
Partially owned office buildings [Member] \| 666 Fifth Avenue [Member] \| Vornado Realty Trust and Kushner Companies [Member]
Acquisitions Of Equity Method Investments [Abstract]
Lending commitment														$ 110,000,000
Partially owned office buildings [Member] \| 330 Madison Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					25.00%
Partially owned office buildings [Member] \| Fairfax Square [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					20.00%
Partially owned office buildings [Member] \| 825 Seventh Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					50.00%
Partially owned office buildings [Member] \| Mezzanine Loans 280 Park Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities					$ 184,516,000			0
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					(18,079,000)			0			0
Partially owned office buildings [Member] \| Mezzanine Loans 280 Park Avenue [Member] \| Vornado Realty Trust [Member]
Acquisitions Of Equity Method Investments [Abstract]
Business Acquisition Cost Of Acquired Entity Cash Paid				111,250,000
Business Acquisition Cost Of Acquired Entity Liabilities Incurred				15,000,000
Partially owned office buildings [Member] \| Mezzanine Loans 280 Park Avenue [Member] \| SL Green [Member]
Acquisitions Of Equity Method Investments [Abstract]
Contribution Of Notes Receivable To Joint Venture				$ 326,250,000
Partially owned office buildings [Member] \| Mezzanine Loans 280 Park Avenue [Member] \| Vornado Realty Trust And SL Green [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage				99.00%
Acquisitions Of Equity Method Investments [Abstract]
Anticipated Future Retenanting And Repositioning Costs					150,000,000
Third party debt					$ 710,000,000
Other equity method investments [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Non-cash impairment charges								11,481,000			17,820,000
Acquisitions Of Equity Method Investments [Abstract]
Square Footage Of Real Estate Property \| sqft				1.2
Other equity method investments [Member] \| Verde Realty Operating Partnership [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					8.30%
Carrying amount of investments in partially owned entities					$ 59,801,000			59,326,000
Impairment loss											14,515,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ 1,661,000			(537,000)			(19,978,000)
Other equity method investments [Member] \| Independence Plaza [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					51.00%
Carrying amount of investments in partially owned entities					$ 48,511,000			0
Acquisitions Of Equity Method Investments [Abstract]
Business Acquisition Cost Of Acquired Entity Cash Paid															$ 55,000,000
Face Value Of Mezzanine Loan Acquired															150,000,000
Face Value Of Senior Loan Acquired															35,000,000
Income Loss From Equity Method Investments					$ 2,457,000			0			0
Other equity method investments [Member] \| Independence Plaza [Member] \| Vornado Realty Trust [Member]
Acquisitions Of Equity Method Investments [Abstract]
Business Acquisition Cost Of Acquired Entity Cash Paid															$ 35,000,000
Other equity method investments [Member] \| Downtown Crossing Boston [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					50.00%
Carrying amount of investments in partially owned entities					$ 46,691,000			46,147,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ (1,461,000)			(1,155,000)			(10,395,000)
Other equity method investments [Member] \| Monmouth Mall [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					50.00%
Carrying amount of investments in partially owned entities					$ 7,536,000			6,251,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					2,556,000			1,952,000			1,789,000
Other equity method investments [Member] \| Other equity investments [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities					140,061,000			125,821,000
Impairment loss											3,305,000
Gain on sale of partial interest					12,525,000
Acquisitions Of Equity Method Investments [Abstract]
Income Loss From Equity Method Investments					$ 2,443,000			$ (13,677,000)			$ (27,715,000)
Other equity method investments [Member] \| Green Courte Real Estate Partners Llc [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					8.30%
Other equity method investments [Member] \| Wells Kinzie Garage [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					50.00%
Other equity method investments [Member] \| Orleans Hubbard Garage [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					50.00%

Investments in Partially Owned Entities - Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2011	Nov. 30, 2011	Jun. 10, 2011	Dec. 31, 2010	Dec. 31, 2009
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity Method Investment Pro Rata Share Debt Of Partially Owned Entities	$ 37,531,298,000			$ 40,443,346,000
Equity Method Investment Prorata Share Debt Of Partially Owned Entities Excluding Our Pro Rata Share Of Lnr Liabilities Related To Cmbs And Cdo	4,199,145,000			3,275,917,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,500,000,000
Toys R Us [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	32.70%
Equity Method Investment Debt Of Partially Owned Entities	$ 6,047,521,000			5,880,296,000
Toys R Us [Member] \| Senior Unsecured Notes At 1075 Due 2017 [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Face Amount	$ 950,000,000
Debt Instrument Maturity Date (String)	07/17
Debt Instrument, Interest Rate at Period End	10.75%
Equity Method Investment Debt Of Partially Owned Entities	$ 930,382,000			928,045,000
Toys R Us [Member] \| Credit Facility 1.85 Billion [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Face Amount	$ 1,850,000,000
Debt Instrument Maturity Date (String)	08/15
Debt Instrument, Interest Rate at Period End	2.77%
Equity Method Investment Debt Of Partially Owned Entities	$ 750,000,000			519,810,000
Toys R Us [Member] \| Senior Unsecured Notes At 850 Due 2017 [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Face Amount	$ 725,000,000
Debt Instrument Maturity Date (String)	12/17
Debt Instrument, Interest Rate at Period End	8.50%
Equity Method Investment Debt Of Partially Owned Entities	$ 716,583,000			715,577,000
Toys R Us [Member] \| $700 million secured term loan facility [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Face Amount	$ 700,000,000
Debt Instrument Maturity Date (String)	09/16
Debt Instrument, Interest Rate at Period End	6.00%
Equity Method Investment Debt Of Partially Owned Entities	$ 684,217,000			689,757,000
Toys R Us [Member] \| Senior Uk Real Estate Facility [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	04/13
Debt Instrument, Interest Rate at Period End	5.02%
Equity Method Investment Debt Of Partially Owned Entities	$ 562,004,000			561,559,000
Toys R Us [Member] \| $400 million secured term loan facility [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument Maturity Date (String)	05/18
Debt Instrument, Interest Rate at Period End	5.25%
Equity Method Investment Debt Of Partially Owned Entities	$ 395,195,000			0
Toys R Us [Member] \| Senior Notes 7875 [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.875%
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument Maturity Date (String)	04/13
Debt Instrument, Interest Rate at Period End	9.50%
Equity Method Investment Debt Of Partially Owned Entities	$ 391,520,000			386,167,000
Toys R Us [Member] \| Senior Secured Notes7375 [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.375%
Debt Instrument, Face Amount	$ 350,000,000
Debt Instrument Maturity Date (String)	09/16
Debt Instrument, Interest Rate at Period End	7.38%
Equity Method Investment Debt Of Partially Owned Entities	$ 361,561,000			350,000,000
Toys R Us [Member] \| Senior Notes 7375 [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.375%
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument Maturity Date (String)	10/18
Debt Instrument, Interest Rate at Period End	9.99%
Equity Method Investment Debt Of Partially Owned Entities	$ 348,537,000			343,528,000
Toys R Us [Member] \| Japan Bank Loans [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Maturity Date Range, Start	03/12
Debt Instrument, Maturity Date Range, End	02/16
Equity Method Investment Debt Of Partially Owned Entities	$ 189,525,000			180,500,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.85%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	2.85%
Toys R Us [Member] \| Spanish Real Estate Facility [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	02/13
Debt Instrument, Interest Rate at Period End	4.51%
Equity Method Investment Debt Of Partially Owned Entities	$ 180,174,000			179,511,000
Toys R Us [Member] \| Junior Uk Real Estate Facility [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	04/13
Equity Method Investment Debt Of Partially Owned Entities	$ 97,964,000			98,266,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	6.81%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	7.84%
Toys R Us [Member] \| Japan Borrowings [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	06/12
Debt Instrument, Interest Rate at Period End	1.06%
Equity Method Investment Debt Of Partially Owned Entities	$ 94,968,000			141,360,000
Toys R Us [Member] \| French Real Estate Facility [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	02/13
Debt Instrument, Interest Rate at Period End	4.51%
Equity Method Investment Debt Of Partially Owned Entities	$ 86,919,000			86,599,000
Toys R Us [Member] \| European And Australian Asset Based Revolving Credit Facility [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	03/16
Debt Instrument, Interest Rate at Period End	2.88%
Equity Method Investment Debt Of Partially Owned Entities	$ 64,520,000			25,767,000
Toys R Us [Member] \| Debentures 8750 [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.75%
Debt Instrument, Face Amount	$ 21,600,000
Debt Instrument Maturity Date (String)	09/21
Debt Instrument, Interest Rate at Period End	9.17%
Equity Method Investment Debt Of Partially Owned Entities	$ 21,089,000			21,054,000
Toys R Us [Member] \| Bonds 7625 [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.625%
Debt Instrument, Face Amount	$ 500,000,000
Equity Method Investment Debt Of Partially Owned Entities	0			495,943,000
Toys R Us [Member] \| Other Toys R Us debt [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity Method Investment Debt Of Partially Owned Entities	$ 172,363,000			156,853,000
Alexanders Inc [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	32.40%
Equity Method Investment Debt Of Partially Owned Entities	$ 1,330,932,000			1,246,411,000
Alexanders Inc [Member] \| Lexington Avenue Mortgage Office Space [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	02/14
Debt Instrument, Interest Rate at Period End	5.33%
Equity Method Investment Debt Of Partially Owned Entities	$ 339,890,000			351,751,000
Alexanders Inc [Member] \| Lexington Avenue Mortgage Retail Space [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	07/15
Debt Instrument, Interest Rate at Period End	4.93%
Equity Method Investment Debt Of Partially Owned Entities	$ 320,000,000			320,000,000
Alexanders Inc [Member] \| Rego Park Construction [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	11/18
Debt Instrument, Interest Rate at Period End	2.15%
Equity Method Investment Debt Of Partially Owned Entities	$ 274,796,000			277,200,000
Debt Instrument, Basis Spread on Variable Rate	1.85%
Debt Instrument, Description of Variable Rate Basis	LIBOR
Notes And Loans Payable Refinanced Amount		$ 275,000,000
Alexanders Inc [Member] \| Kings Plaza Regional Shopping Center Mortgage [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	06/16
Debt Instrument, Interest Rate at Period End	2.24%
Equity Method Investment Debt Of Partially Owned Entities	$ 250,000,000			151,214,000
Debt Instrument, Basis Spread on Variable Rate	1.70%
Debt Instrument, Description of Variable Rate Basis	LIBOR
Notes And Loans Payable Refinanced Amount			$ 250,000,000
Alexanders Inc [Member] \| Rego Park Mortgage [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	03/12
Debt Instrument, Interest Rate at Period End	0.75%
Equity Method Investment Debt Of Partially Owned Entities	$ 78,246,000			78,246,000
Alexanders Inc [Member] \| Paramus Mortgage [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	10/18
Debt Instrument, Interest Rate at Period End	2.90%
Equity Method Investment Debt Of Partially Owned Entities	$ 68,000,000			$ 68,000,000
Lexington Realty Trust [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	12.00%			12.80%	15.20%
Lexington Realty Trust [Member] \| Lexington Mortgage Notes Payable [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Maturity Date Range, Start	2012
Debt Instrument, Maturity Date Range, End	2037
Debt Instrument, Interest Rate at Period End	5.80%
Equity Method Investment Debt Of Partially Owned Entities	$ 1,712,750,000			$ 1,927,729,000
LNR [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	26.20%
Equity Method Investment Debt Of Partially Owned Entities	$ 127,701,840,000			142,509,880,000
LNR [Member] \| LNR mortgage notes payable [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Maturity Date Range, Start	2014
Debt Instrument, Maturity Date Range, End	2043
Debt Instrument, Interest Rate at Period End	4.54%
Equity Method Investment Debt Of Partially Owned Entities	$ 353,504,000			508,547,000
LNR [Member] \| Liabilities Of Consolidated CMBS And CDO Trusts [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Interest Rate at Period End	5.32%
Equity Method Investment Debt Of Partially Owned Entities	$ 127,348,336,000			142,001,333,000
Partially owned office buildings [Member] \| Fifth Avenue 666 [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	49.50%
Debt Instrument Maturity Date (String)	02/19
Debt Instrument, Interest Rate at Period End	6.80%
Equity Method Investment Debt Of Partially Owned Entities	$ 1,035,884,000
Partially owned office buildings [Member] \| Mezzanine Loans 280 Park Avenue [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	06/16
Debt Instrument, Interest Rate at Period End	6.65%
Equity Method Investment Debt Of Partially Owned Entities	$ 737,678,000
Partially owned office buildings [Member] \| Warner Building [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	05/16
Debt Instrument, Interest Rate at Period End	6.26%
Equity Method Investment Debt Of Partially Owned Entities	$ 292,700,000			292,700,000
Partially owned office buildings [Member] \| One Park Avenue [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	30.30%
Debt Instrument Maturity Date (String)	03/16
Debt Instrument, Interest Rate at Period End	5.00%
Equity Method Investment Debt Of Partially Owned Entities	$ 250,000,000
Partially owned office buildings [Member] \| Madison Avenue [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	25.00%
Debt Instrument Maturity Date (String)	06/15
Debt Instrument, Interest Rate at Period End	1.78%
Equity Method Investment Debt Of Partially Owned Entities	$ 150,000,000			150,000,000
Partially owned office buildings [Member] \| Fairfax Square [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	20.00%
Debt Instrument Maturity Date (String)	12/14
Debt Instrument, Interest Rate at Period End	7.00%
Equity Method Investment Debt Of Partially Owned Entities	$ 70,974,000			71,764,000
Partially owned office buildings [Member] \| Rosslyn Plaza [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument Maturity Date (String)	01/12
Debt Instrument, Interest Rate at Period End	1.27%
Equity Method Investment Debt Of Partially Owned Entities	$ 56,680,000			56,680,000
Partially owned office buildings [Member] \| West 34th Street [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	34.80%
Debt Instrument Maturity Date (String)	07/22
Debt Instrument, Interest Rate at Period End	5.71%
Equity Method Investment Debt Of Partially Owned Entities	$ 50,150,000			50,150,000
Partially owned office buildings [Member] \| West 57th Street [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%
Debt Instrument Maturity Date (String)	02/14
Debt Instrument, Interest Rate at Period End	4.94%
Equity Method Investment Debt Of Partially Owned Entities	$ 21,864,000			22,922,000
Partially owned office buildings [Member] \| Seventh Avenue [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%
Debt Instrument Maturity Date (String)	10/14
Debt Instrument, Interest Rate at Period End	8.07%
Equity Method Investment Debt Of Partially Owned Entities	$ 20,080,000			20,565,000
Partially owned office buildings [Member] \| Other mortgage notes payable collateralized by real estate [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity Method Investment Debt Of Partially Owned Entities	$ 0			139,337,000
Partially owned office buildings [Member] \| Executive Tower [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Remaining equity interest percentage acquired	97.50%
India real estate ventures [Member] \| Tcg Urban Infrastructure Holdings [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	25.00%
Debt Instrument, Maturity Date Range, Start	2012
Debt Instrument, Maturity Date Range, End	2022
Debt Instrument, Interest Rate at Period End	11.87%
Equity Method Investment Debt Of Partially Owned Entities	$ 226,534,000			196,319,000
Other equity method investments [Member] \| Verde Realty Operating Partnership [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	8.30%
Debt Instrument, Maturity Date Range, Start	2013
Debt Instrument, Maturity Date Range, End	2025
Debt Instrument, Interest Rate at Period End	6.18%
Equity Method Investment Debt Of Partially Owned Entities	$ 340,378,000			581,086,000
Other equity method investments [Member] \| Green Courte Real Estate Partners Llc [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	8.30%
Debt Instrument, Maturity Date Range, Start	2012
Debt Instrument, Maturity Date Range, End	2018
Debt Instrument, Interest Rate at Period End	5.63%
Equity Method Investment Debt Of Partially Owned Entities	$ 293,771,000			296,991,000
Other equity method investments [Member] \| Monmouth Mall [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%
Debt Instrument, Maturity Date Range, Start	02/14
Debt Instrument, Maturity Date Range, End	09/15
Debt Instrument, Interest Rate at Period End	5.32%
Equity Method Investment Debt Of Partially Owned Entities	$ 173,938,000			164,474,000
Other equity method investments [Member] \| Wells Kinzie Garage [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%
Debt Instrument Maturity Date (String)	12/17
Debt Instrument, Interest Rate at Period End	5.00%
Equity Method Investment Debt Of Partially Owned Entities	$ 14,792,000			15,022,000
Other equity method investments [Member] \| Orleans Hubbard Garage [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%
Debt Instrument Maturity Date (String)	12/17
Debt Instrument, Interest Rate at Period End	5.00%
Equity Method Investment Debt Of Partially Owned Entities	$ 9,362,000			9,508,000
Other equity method investments [Member] \| Waterfront Associates Llc [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Equity method ownership percentage	2.50%
Equity Method Investment Debt Of Partially Owned Entities	$ 0			217,106,000
Other equity method investments [Member] \| Other Equity Method Investments Other [Member]
Schedule Of Long Term Debt Equity Method Investments [Line Items]
Debt Instrument, Interest Rate at Period End	4.62%
Equity Method Investment Debt Of Partially Owned Entities	$ 663,162,000			$ 418,339,000

Debt (Details) - USD ($) $ in Thousands			12 Months Ended
Debt (Details) - USD ($) $ in Thousands	Dec. 28, 2011	Feb. 11, 2011	Dec. 31, 2011	Nov. 30, 2011	Dec. 31, 2010
Notes and mortgages payable			$ 8,558,275		$ 8,255,101
Senior unsecured notes			1,357,661		1,082,928
Exchangeable senior debentures			497,898		491,000
Convertible senior debentures			10,168		186,413
Revolving credit facility debt			138,000		874,000
Collateral Property Net Carrying Value			10,400,000
Line of Credit Facility, Maximum Borrowing Capacity			2,500,000
Mortgages Payable [Member]
Debt Repayment Of Principal [Line Items]
2012			828,404
2013			1,741,750
2014			495,098
2015			538,159
2016			1,576,394
Thereafter			3,366,770
Senior Unsecured Debt And Revolving Credit Facilities [Member]
Debt Repayment Of Principal [Line Items]
2012			0
2013			0
2014			0
2015			500,000
2016			138,000
Thereafter			$ 860,000
Notes And Mortgages Payable Fixed Rate [Member]
Interest Rate, End of Period			5.53%
Notes and mortgages payable			$ 6,489,282		6,248,841
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office 350 Park Avenue [Member]
Debt Instrument Maturity			01/12
Interest Rate, End of Period			5.48%
Notes and mortgages payable			$ 430,000		430,000
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office Two Penn Plaza [Member]
Debt Instrument Maturity			03/18
Spread Over LIBOR		2.00%
Debt Instrument, Description of Variable Rate Basis		LIBOR
Interest Rate, End of Period			5.13%
Notes and mortgages payable			$ 425,000		277,347
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office 1290 Avenue Of Americas [Member]
Debt Instrument Maturity			01/13
Interest Rate, End of Period			5.97%
Notes and mortgages payable			$ 413,111		424,136
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office 770 Broadway [Member]
Debt Instrument Maturity			03/16
Interest Rate, End of Period			5.65%
Notes and mortgages payable			$ 353,000		353,000
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office 888 Seventh Avenue [Member]
Debt Instrument Maturity			01/16
Interest Rate, End of Period			5.71%
Notes and mortgages payable			$ 318,554		318,554
Notes And Mortgages Payable Fixed Rate [Member] \| Retail Other [Member]
Maturity, Range, End			05/36
Maturity, Range, Start			03/12
Interest Rate, Range, Minimum			5.12%
Interest Rate, Range, Maximum			7.30%
Notes and mortgages payable			$ 95,541		97,054
Notes And Mortgages Payable Fixed Rate [Member] \| Retail Las Catalinas Mall [Member]
Debt Instrument Maturity			11/13
Interest Rate, End of Period			6.97%
Notes and mortgages payable			$ 55,912		57,737
Notes And Mortgages Payable Fixed Rate [Member] \| Retail 828-850 Madison Avenue Condominium [Member]
Debt Instrument Maturity			06/18
Interest Rate, End of Period			5.29%
Notes and mortgages payable			$ 80,000		80,000
Notes And Mortgages Payable Fixed Rate [Member] \| Retail Broadway Mall [Member]
Debt Instrument Maturity			07/13
Interest Rate, End of Period			5.30%
Notes and mortgages payable			$ 87,750		90,227
Notes And Mortgages Payable Fixed Rate [Member] \| Retail Montehiedra Town Center [Member]
Debt Instrument Maturity			07/16
Interest Rate, End of Period			6.04%
Notes and mortgages payable			$ 120,000		120,000
Notes And Mortgages Payable Fixed Rate [Member] \| Retail 510 5th Avenue [Member]
Debt Instrument Maturity			01/16
Interest Rate, End of Period			5.60%
Notes and mortgages payable			$ 31,732		32,189
Notes And Mortgages Payable Fixed Rate [Member] \| Retail North Bergen Tonnelle Avenue [Member]
Debt Instrument Maturity			01/18
Interest Rate, End of Period			4.59%
Notes and mortgages payable			$ 75,000		0
Notes And Mortgages Payable Fixed Rate [Member] \| Retail Cross Collateralized Mortgages On 40 Strip Shopping Centers [Member]
Debt Instrument Maturity			09/20
Interest Rate, End of Period			4.21%
Notes and mortgages payable			$ 585,398		597,138
Notes And Mortgages Payable Fixed Rate [Member] \| Other Industrial Warehouses [Member]
Notes and mortgages payable			$ 0		24,358
Notes And Mortgages Payable Fixed Rate [Member] \| Other 555 California Street [Member]
Debt Instrument Maturity			09/21
Interest Rate, End of Period			5.10%
Notes and mortgages payable			$ 600,000		640,911
Notes And Mortgages Payable Fixed Rate [Member] \| Other Borgata Land [Member]
Debt Instrument Maturity			02/21
Interest Rate, End of Period			5.14%
Notes and mortgages payable			$ 60,000		0
Notes And Mortgages Payable Fixed Rate [Member] \| Merchandise Mart Washington Design Center [Member]
Notes and mortgages payable			$ 0		43,447
Notes And Mortgages Payable Fixed Rate [Member] \| Merchandise Mart Boston Design Center [Member]
Debt Instrument Maturity			09/15
Interest Rate, End of Period			5.02%
Notes and mortgages payable			$ 67,350		68,538
Notes And Mortgages Payable Fixed Rate [Member] \| Merchandise Mart Merchandise Mart [Member]
Debt Instrument Maturity			12/16
Interest Rate, End of Period			5.57%
Notes and mortgages payable			$ 550,000		550,000
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 1800, 1851 And 1901 South Bell Street [Member]
Notes and mortgages payable			$ 0		10,099
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 1225 Clark Street [Member]
Debt Instrument Maturity			08/13
Interest Rate, End of Period			7.08%
Notes and mortgages payable			$ 26,211		27,616
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 2011 Crystal Drive [Member]
Debt Instrument Maturity			08/17
Interest Rate, End of Period			7.30%
Notes and mortgages payable			$ 80,486		81,362
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 1750 Pennsylvania Avenue [Member]
Debt Instrument Maturity			06/12
Interest Rate, End of Period			7.26%
Notes and mortgages payable			$ 44,330		45,132
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 2231 Crystal Drive [Member]
Debt Instrument Maturity			08/13
Interest Rate, End of Period			7.08%
Notes and mortgages payable			$ 43,819		46,358
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 1235 Clark Street [Member]
Debt Instrument Maturity			07/12
Interest Rate, End of Period			6.75%
Notes and mortgages payable			$ 51,309		52,314
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office Universal Buildings [Member]
Debt Instrument Maturity			04/14
Interest Rate, End of Period			6.44%
Notes and mortgages payable			$ 98,239		103,049
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 1550 And 1750 Crystal Drive [Member]
Debt Instrument Maturity			11/14
Interest Rate, End of Period			7.08%
Notes and mortgages payable			$ 76,624		79,411
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office Reston Executive I, II, And III [Member]
Debt Instrument Maturity			01/13
Interest Rate, End of Period			5.57%
Notes and mortgages payable			$ 93,000		93,000
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office Bowen Building [Member]
Debt Instrument Maturity			06/16
Interest Rate, End of Period			6.14%
Notes and mortgages payable			$ 115,022		115,022
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 1215 Clark Street, 200 12th Street And 251 18th Street [Member]
Debt Instrument Maturity			01/25
Interest Rate, End of Period			7.09%
Notes and mortgages payable			$ 108,423		110,931
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office River House Apartments [Member]
Debt Instrument Maturity			04/15
Interest Rate, End of Period			5.43%
Notes and mortgages payable			$ 195,546		195,546
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office Skyline Place [Member]
Debt Instrument Maturity			02/17
Interest Rate, End of Period			5.74%
Notes and mortgages payable			$ 678,000		678,000
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 220 20th Street [Member]
Debt Instrument Maturity			02/18
Interest Rate, End of Period			4.61%
Notes and mortgages payable			$ 75,037		0
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office West End 25 [Member]
Debt Instrument Maturity			06/21
Interest Rate, End of Period			4.88%
Notes and mortgages payable			$ 101,671		0
Notes And Mortgages Payable Fixed Rate [Member] \| Washington Dc Office 2121 Crystal Drive [Member]
Debt Instrument Maturity			03/23
Interest Rate, End of Period			5.51%
Notes and mortgages payable			$ 150,000		0
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office Eleven Penn Plaza [Member]
Debt Instrument, Description of Variable Rate Basis	LIBOR
Notes and mortgages payable			$ 0		199,320
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office 909 Third Avenue [Member]
Debt Instrument Maturity			04/15
Interest Rate, End of Period			5.64%
Notes and mortgages payable			$ 203,217		207,045
Notes And Mortgages Payable Variable Rate [Member]
Interest Rate, End of Period			2.30%
Notes and mortgages payable			$ 2,068,993		2,006,260
Notes And Mortgages Payable Variable Rate [Member] \| Other Other [Member]
Notes and mortgages payable			$ 0		66,267
Notes And Mortgages Payable Variable Rate [Member] \| Other 220 Central Park South [Member]
Debt Instrument Maturity			10/13
Spread Over LIBOR			2.75%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			3.03%
Notes and mortgages payable			$ 123,750		123,750
Notes And Mortgages Payable Variable Rate [Member] \| Retail 435 Seventh Avenue [Member]
Debt Instrument Maturity			08/14
Spread Over LIBOR			3.00%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			5.00%
Notes and mortgages payable			$ 51,353		51,844
Notes And Mortgages Payable Variable Rate [Member] \| Retail 4 Union Square South [Member]
Debt Instrument Maturity			04/14
Spread Over LIBOR			3.25%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			3.69%
Notes and mortgages payable			$ 75,000		75,000
Notes And Mortgages Payable Variable Rate [Member] \| Retail Beverly Connection [Member]
Debt Instrument Maturity			09/14
Spread Over LIBOR			4.25%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			4.75%
Notes and mortgages payable			$ 100,000		100,000
Notes And Mortgages Payable Variable Rate [Member] \| Retail Bergen Town Center [Member]
Debt Instrument Maturity			03/13
Spread Over LIBOR			1.50%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			1.93%
Notes and mortgages payable			$ 283,590		279,044
Notes And Mortgages Payable Variable Rate [Member] \| Retail Green Acres Mall [Member]
Debt Instrument Maturity			02/13
Spread Over LIBOR			1.40%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			1.67%
Notes and mortgages payable			$ 325,045		335,000
Notes And Mortgages Payable Variable Rate [Member] \| Retail Other [Member]
Debt Instrument Maturity			11/12
Spread Over LIBOR			3.75%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			4.02%
Notes and mortgages payable			$ 19,876		21,862
Notes And Mortgages Payable Variable Rate [Member] \| Retail San Jose Strip Centre [Member]
Debt Instrument Maturity			03/13
Spread Over LIBOR			4.00%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			4.32%
Notes and mortgages payable			$ 112,476		120,863
Notes And Mortgages Payable Variable Rate [Member] \| Retail Cross Collateralized Mortgages On 40 Strip Shopping Centers [Member]
Debt Instrument Maturity			09/20
Spread Over LIBOR			1.36%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			2.36%
Notes and mortgages payable			$ 60,000		60,000
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC Office 1730 M And 1150 17th Street [Member]
Debt Instrument Maturity			06/14
Spread Over LIBOR			1.40%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			1.69%
Notes and mortgages payable			$ 43,581		43,581
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC Office River House Apartments [Member]
Debt Instrument Maturity			04/18
Spread Over LIBOR			1.53%
Debt Instrument, Description of Variable Rate Basis			Freddie Mac
Interest Rate, End of Period			1.53%
Notes and mortgages payable			$ 64,000		64,000
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC 2200/2300 Clarendon Boulevard [Member]
Debt Instrument Maturity			01/15
Spread Over LIBOR			0.75%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			1.03%
Notes and mortgages payable			$ 53,344		59,278
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC Office 220 20th Street [Member]
Notes and mortgages payable			0		83,573
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC Office West End 25 [Member]
Notes and mortgages payable			$ 0		95,220
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC Office 2101 L Street [Member]
Debt Instrument Maturity			02/13
Spread Over LIBOR			1.20%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			1.50%
Notes and mortgages payable			$ 150,000		150,000
Notes And Mortgages Payable Variable Rate [Member] \| New York Office 866 UN Plaza [Member]
Debt Instrument Maturity			05/16
Spread Over LIBOR			1.25%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			1.69%
Notes and mortgages payable			$ 44,978		44,978
Notes And Mortgages Payable Variable Rate [Member] \| New York Office Manhattan Mall [Member]
Debt Instrument Maturity			02/12
Spread Over LIBOR			0.55%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			0.83%
Notes and mortgages payable			$ 232,000		232,000
Notes And Mortgages Payable Variable Rate [Member] \| New York Office Eleven Penn Plaza [Member]
Debt Instrument Maturity			01/19
Spread Over LIBOR	2.35%		2.35%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			2.60%
Notes and mortgages payable			$ 330,000		0
Total Notes And Mortgages Payable [Member]
Interest Rate, End of Period			4.75%
Senior Unsecured Notes [Member]
Interest Rate, End of Period			5.70%
Senior Unsecured Notes [Member] \| Senior Unsecured Notes Due 2011 [Member]
Senior unsecured notes			$ 0		100,382
Senior Unsecured Notes [Member] \| Senior Unsecured Notes Due 2039 [Member]
Debt Instrument Maturity			10/39
Interest Rate, End of Period			7.88%
Senior unsecured notes			$ 460,000		460,000
Senior Unsecured Notes [Member] \| Senior Unsecured Notes Due 2015 [Member]
Debt Instrument Maturity			04/15
Interest Rate, End of Period			4.25%
Senior unsecured notes			$ 499,462		499,296
Senior Unsecured Notes [Member] \| Floating Rate Senior Unsecured Notes Due 2011 [Member]
Senior unsecured notes			$ 0		23,250
Senior Unsecured Notes [Member] \| Senior Unsecured Notes Due 2022 [Member]
Debt Instrument Maturity			01/22
Interest Rate, End of Period			5.00%
Notes and mortgages payable			$ 398,199		0
Interest Rate, Stated				5.00%
Exchangeable Senior Debentures [Member] \| Exchangeable Senior Debenture 3.88% Due 2025 [Member]
Debt Instrument Maturity			04/12
Interest Rate, End of Period			5.32%
Interest Rate, Stated			3.88%
Convertible Senior Debentures [Member]
Interest Rate, End of Period			5.45%
Convertible Senior Debentures [Member] \| Convertible Senior Debenture 3.63% Due 2026 [Member]
Convertible senior debentures			$ 0		176,499
Interest Rate, Stated			3.63%
Convertible Senior Debentures [Member] \| Convertible Senior Debenture 2.85% Due 2027 [Member]
Debt Instrument Maturity			04/12
Interest Rate, End of Period			5.45%
Convertible senior debentures			$ 10,168		9,914
Interest Rate, Stated			2.85%
Unsecured Revolving Credit Facilities [Member]
Interest Rate, End of Period			1.48%
Unsecured Revolving Credit Facilities [Member] \| Unsecured Revolving Credit Facility $1.25 Billion Maturing 11/16 [Member]
Debt Instrument Maturity			11/16
Spread Over LIBOR			1.25%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Interest Rate, End of Period			1.48%
Revolving credit facility debt			$ 138,000		669,000
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,250,000
Unsecured Revolving Credit Facilities [Member] \| Unsecured Revolving Credit Facility $1.25 Billion Maturing 06/16 [Member]
Debt Instrument Maturity			06/16
Spread Over LIBOR			1.35%
Debt Instrument, Description of Variable Rate Basis			LIBOR
Revolving credit facility debt			$ 0		$ 205,000
Line of Credit Facility, Maximum Borrowing Capacity			1,250,000
Unsecured Revolving Credit Facility Reserved For Outstanding Letters Of Credit			$ 22,085

Shareholders Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Aug. 05, 2011	May 05, 2011	Apr. 20, 2011
Class Of Stock [Line Items]
Accumulated other comprehensive income	$ 73,729	$ 73,453
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: authorized shares	110,000,000	110,000,000
Preferred Stock, Value	$ 1,021,660	$ 783,088
Preferred shares of beneficial interest: outstanding shares	42,186,709	32,340,009
Preferred Stock, Additional Disclosure [Abstract]
Preferred shares of beneficial interest: issued shares	42,186,709	32,340,009
Proceeds from the issuance of shares, Value	$ 238,842		$ 710,226
Stock Redeemed Or Called During Period Value		$ 35,600
Preferred Stock Redemption Discount	5,000	4,382	0
Proceeds from the issuance of Series J preferred shares	$ 238,842	$ 0	$ 0
Series A Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage	6.50%
Series A Preferred Stock [Member] \| Convertible Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: authorized shares	5,750,000	5,750,000
Preferred Stock, Value	$ 1,787	$ 2,057
Preferred shares of beneficial interest: outstanding shares	36,709	40,009
Preferred Stock Liquidation Preference	$ 50.00
Preferred Stock, Dividend Rate, Per-Dollar-Amount	$ 3.25
Preferred Stock, Additional Disclosure [Abstract]
Conversion Rate of Preferred Stock to Common Stock	1.4334
Series E Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage	7.00%
Series E Preferred Stock [Member] \| Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: authorized shares	3,450,000	3,450,000
Preferred Stock, Value	$ 72,248	$ 72,248
Preferred shares of beneficial interest: outstanding shares	3,000,000	3,000,000
Preferred Stock Liquidation Preference	$ 25.00
Preferred Stock, Dividend Rate, Per-Dollar-Amount	1.75
Preferred Stock, Additional Disclosure [Abstract]
Preferred Stock Redemption Price Per Share	$ 25.00
Series F Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage	6.75%
Series F Preferred Stock [Member] \| Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: authorized shares	6,000,000	6,000,000
Preferred Stock, Value	$ 144,720	$ 144,720
Preferred shares of beneficial interest: outstanding shares	6,000,000	6,000,000
Preferred Stock Liquidation Preference	$ 25.00
Preferred Stock, Dividend Rate, Per-Dollar-Amount	1.6875
Preferred Stock, Additional Disclosure [Abstract]
Preferred Stock Redemption Price Per Share	$ 25.00
Series G Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage	6.625%
Series G Preferred Stock [Member] \| Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: authorized shares	9,200,000	9,200,000
Preferred Stock, Value	$ 193,135	$ 193,135
Preferred shares of beneficial interest: outstanding shares	8,000,000	8,000,000
Preferred Stock Liquidation Preference	$ 25.00
Preferred Stock, Dividend Rate, Per-Dollar-Amount	1.656
Preferred Stock, Additional Disclosure [Abstract]
Preferred Stock Redemption Price Per Share	$ 25.00
Series H Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage	6.75%
Series H Preferred Stock [Member] \| Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: authorized shares	4,600,000	4,600,000
Preferred Stock, Value	$ 108,549	$ 108,549
Preferred shares of beneficial interest: outstanding shares	4,500,000	4,500,000
Preferred Stock Liquidation Preference	$ 25.00
Preferred Stock, Dividend Rate, Per-Dollar-Amount	1.6875
Preferred Stock, Additional Disclosure [Abstract]
Preferred Stock Redemption Price Per Share	$ 25.00
Series I Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage	6.625%
Series I Preferred Stock [Member] \| Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: authorized shares	12,050,000	12,050,000
Preferred Stock, Value	$ 262,379	$ 262,379
Preferred shares of beneficial interest: outstanding shares	10,800,000	10,800,000
Preferred Stock Liquidation Preference	$ 25.00
Preferred Stock, Dividend Rate, Per-Dollar-Amount	1.656
Preferred Stock, Additional Disclosure [Abstract]
Preferred Stock Redemption Price Per Share	$ 25.00
Series J Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage	6.875%
Series J Preferred Stock [Member] \| Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: authorized shares	9,850,000	0
Preferred Stock, Value	$ 238,842	$ 0
Preferred shares of beneficial interest: outstanding shares	9,850,000	0
Preferred Stock Liquidation Preference	$ 25.00
Preferred Stock, Dividend Rate, Per-Dollar-Amount	1.71875
Preferred Stock, Additional Disclosure [Abstract]
Preferred Stock Redemption Price Per Share	$ 25.00
Series J Preferred Stock [Member] \| Public Offering [Member]
Preferred Stock, Additional Disclosure [Abstract]
Preferred Stock Par Or Stated Value Per Share						$ 25
Series J Preferred Stock [Member] \| Public Offering [Member] \| Redeemable Preferred Stock [Member]
Preferred Stock, Additional Disclosure [Abstract]
Preferred shares of beneficial interest: issued shares				1,000,000	800,000	7,000,000
Series J Preferred Stock [Member] \| Over Allotment [Member] \| Redeemable Preferred Stock [Member]
Preferred Stock, Additional Disclosure [Abstract]
Preferred shares of beneficial interest: issued shares						1,050,000

Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative Assets	$ 30,600
Financial Assets And Liabilities Not Measured At Fair Value By Balance Sheet Grouping [Line Items]
Mezzanine loans receivable	133,948	$ 202,412
Notes and mortgages payable	8,558,275	8,255,101
Senior unsecured notes	1,357,661	1,082,928
Exchangeable senior debentures	497,898	491,000
Convertible senior debentures	10,168	186,413
Revolving credit facility debt	138,000	874,000
Fair Value, Measurements, Recurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Marketable Securities	741,321	766,116
Derivative Assets		17,616
Deferred Compensation Plan Assets	95,457	91,549
Real Estate Fund investments	346,650	144,423
Total assets	1,214,028	1,019,704
Mandatorily redeemable instruments (included in other liabilities)	54,865	55,097
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investments in Partially Owned Entities at Fair Value		11,413
Real Estate, Net at Fair Value	62,033	381,889
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial Assets And Liabilities Not Measured At Fair Value By Balance Sheet Grouping [Line Items]
Mezzanine loans receivable	133,948	202,412
Notes and mortgages payable	8,558,275	8,255,101
Senior unsecured notes	1,357,661	1,082,928
Exchangeable senior debentures	497,898	491,000
Convertible senior debentures	10,168	186,413
Revolving credit facility debt	138,000	874,000
Total debt	10,562,002	10,889,442
Estimate of Fair Value, Fair Value Disclosure [Member]
Financial Assets And Liabilities Not Measured At Fair Value By Balance Sheet Grouping [Line Items]
Mezzanine loans receivable	128,581	197,581
Notes and mortgages payable	8,685,619	8,446,791
Senior unsecured notes	1,426,406	1,119,512
Exchangeable senior debentures	509,982	554,355
Convertible senior debentures	10,220	191,510
Revolving credit facility debt	138,000	874,000
Total debt	10,770,227	11,186,168
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Marketable Securities	741,321	766,116
Derivative Assets	0	0
Deferred Compensation Plan Assets	39,236	43,699
Real Estate Fund investments	0	0
Total assets	780,557	809,815
Mandatorily redeemable instruments (included in other liabilities)	54,865	55,097
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investments in Partially Owned Entities at Fair Value		0
Real Estate, Net at Fair Value	0	0
Fair Value Inputs Level 2 Member \| Fair Value, Measurements, Recurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Marketable Securities	0	0
Derivative Assets	30,600	17,616
Deferred Compensation Plan Assets	0	0
Real Estate Fund investments	0	0
Total assets	30,600	17,616
Mandatorily redeemable instruments (included in other liabilities)	0	0
Fair Value Inputs Level 2 Member \| Fair Value, Measurements, Nonrecurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investments in Partially Owned Entities at Fair Value		0
Real Estate, Net at Fair Value	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Marketable Securities	0	0
Derivative Assets	0	0
Deferred Compensation Plan Assets	56,221	47,850
Real Estate Fund investments	346,650	144,423
Total assets	402,871	192,273
Mandatorily redeemable instruments (included in other liabilities)	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investments in Partially Owned Entities at Fair Value		11,413
Real Estate, Net at Fair Value	62,033	381,889
Real Estate Fund [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance - changes in Level 3 " deferred compensation plan assets"	346,650	144,423	$ 0
Fair Value Asset Measured on Recurring Basis, Asset, Purchases	248,803	144,423
Fair Value Asset Measured On Recurring Basis Asset Sales	(48,355)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	17,386	0
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Other Net	(15,607)	0
Deferred Compensation Plan Asset [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance - changes in Level 3 " deferred compensation plan assets"	56,221	47,850	$ 39,589
Fair Value Asset Measured on Recurring Basis, Asset, Purchases	25,692	17,006
Fair Value Asset Measured On Recurring Basis Asset Sales	(18,801)	(12,320)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	1,232	3,527
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Other Net	$ 248	$ 48

Stock-based Compensation (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($) Y $ / shares shares	Dec. 31, 2010 USD ($) Y $ / shares shares	Dec. 31, 2009 USD ($) Y $ / shares	Mar. 31, 2008 USD ($)	Apr. 30, 2006 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	$ 28,853	$ 34,614	$ 59,814
Unamortized Portion Of Awards Expensed	$ 0	$ 0	$ 32,588
Share Based Compensation Employee Stock Purchase Plan Activity [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period \| $ / shares	$ 56.89
Stock Options Granted Weighted Average Exercise Price \| $ / shares	91.70
Stock Options Exercised Weighted Average Exercise Price \| $ / shares	47.14
Stock Options Cancelled Weighted Average Exercise Price \| $ / shares	81.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, End of Period \| $ / shares	$ 61.56	$ 56.89
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance \| shares	5,488,880
Stock Options Granted Shares \| shares	534,168
Stock Options Exercised Shares \| shares	1,173,875
Stock Options Cancelled Shares \| shares	378,178
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance \| shares	4,470,995	5,488,880
Options Vested And Expected To Vest Shares \| shares	4,439,486
Options Vested And Expected To Vest Weighted Average Exercise Price \| $ / shares	$ 61.38
Options Excercisable Shares \| shares	2,395,763
Options Excercisable Weighted Average Exercise Price \| $ / shares	$ 57.20
Options Exercisable Weighted Average Remaining Contractual Term \| Y	3.4
Options Outstanding Weighted Average Remaining Contractual Term \| Y	5.5
Options Vested And Expected To Vest Weighted Average Remaining Contractual Term \| Y	5.5
Options Outstanding Aggregate Intrinsic Value	$ 87,889
Options Vested And Expected To Vest Aggregate Intrinsic Value	87,651
Options Excercisable Aggregate Intrinsic Value	$ 56,181
Fair Value Assumptions Expected Volatility Rate	35.00%	35.00%	28.00%
Fair Value Assumptions Expected Life \| Y	7.1	7.90	7.00
Fair Value Assumptions Risk Free Interest Rate	2.90%	3.60%	2.30%
Fair Value Assumptions Risk Expected Dividend Yield	4.40%	4.90%	4.60%
Full Value Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized \| shares	6,000,000
Share Based Compensation Shares Available For Grant \| shares	5,582,000
Not Full Value Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized \| shares	12,000,000
Out Performance Plan 2008 [Member]
Out Performance Plan [Abstract]
Share Based Compensation Amount Authorized				$ 75,000
Fair Value Of Awards Granted				$ 21,600
Award Amortization Period				5 years
Out Performance Plan 2006 [Member]
Out Performance Plan [Abstract]
Share Based Compensation Amount Authorized					$ 100,000
Fair Value Of Awards Granted					$ 46,141
Award Amortization Period					5 years
Out Performance Plan 2008 And 2006 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	$ 740	$ 5,062	$ 23,493
Unamortized Portion Of Awards Expensed			13,722
Out Performance Plan [Abstract]
Compensation Cost Not Yet Recognized	510
Dividends Paid On Nonvested Units	32	815	1,935
Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	8,794	$ 7,916	25,911
Unamortized Portion Of Awards Expensed			$ 18,866
Out Performance Plan [Abstract]
Compensation Cost Not Yet Recognized	$ 20,398
Compensation Cost Recognition Period \| Y	1.8
Award Vesting Period	4 years
Stock options expiration term	10 years
Share Based Compensation Employee Stock Purchase Plan Activity [Abstract]
Grant Date Fair Value Of Options \| $ / shares	$ 21.42	$ 16.96	$ 5.67
Cash Received From Exercise Of Stock Options	$ 23,736	$ 25,338	$ 1,749
Total Intrinsic Value Of Options Excercised	39,348	60,923	62,139
Restricted Stock Units RSU [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	1,814	1,432	2,063
Out Performance Plan [Abstract]
Fair Value Of Awards Granted	1,042	3,922	496
Compensation Cost Not Yet Recognized	$ 3,567
Compensation Cost Recognition Period \| Y	1.9
Award Vesting Period	4 years
Dividends Paid On Nonvested Units	$ 185	115	161
Fair Value Of Awards Vested	$ 2,031	$ 2,186	3,272
Share Based Compensation Equity Instruments Other Than Options Plan Activity [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period \| $ / shares	$ 78.60
Units Granted Weighted Average Grant Date Fair Value \| $ / shares	91.70
Awards Vested Weighted Average Grant Date Fair Value \| $ / shares	83.31
Units Cancelled Weighted Average Grant Date Fair Value \| $ / shares	72.30
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, End of Period \| $ / shares	$ 79.28	$ 78.60
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance \| shares	75,548
Restricted Stock Granted Shares \| shares	11,362
Units Vested \| shares	24,384
Forfeited Units \| shares	1,298
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance \| shares	61,228	75,548
Restricted Operating Partnership Units Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	$ 17,505	$ 20,204	8,347
Out Performance Plan [Abstract]
Fair Value Of Awards Granted	18,727	31,437	10,691
Compensation Cost Not Yet Recognized	$ 18,903
Compensation Cost Recognition Period \| Y	1.5
Award Vesting Period	4 years
Dividends Paid On Nonvested Units	$ 2,567	2,285	1,583
Fair Value Of Awards Vested	$ 10,260	$ 14,087	$ 4,020
Share Based Compensation Equity Instruments Other Than Options Plan Activity [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period \| $ / shares	$ 56.78
Units Granted Weighted Average Grant Date Fair Value \| $ / shares	86.00
Awards Vested Weighted Average Grant Date Fair Value \| $ / shares	58.47
Units Cancelled Weighted Average Grant Date Fair Value \| $ / shares	58.50
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, End of Period \| $ / shares	$ 65.29	$ 56.78
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance \| shares	720,457
Restricted Stock Granted Shares \| shares	217,740
Units Vested \| shares	175,462
Forfeited Units \| shares	63,076
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance \| shares	699,659	720,457
Restricted Operating Partnership And 2006 Out Performance Plan Combined [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional Expense From Acceleration Of Vesting		$ 2,800

Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Per Share [Abstract]
Income from continuing operations, net of income attributable to noncontrolling interests									$ 525,584	$ 655,053	$ 59,655
Income (loss) from discontinued operations, net of income attributable to noncontrolling interests									136,718	(7,170)	46,514
Net income attributable to Vornado									662,302	647,883	106,169
Preferred share dividends									(65,531)	(55,534)	(57,076)
Discount on preferred share and unit redemptions									5,000	4,382	0
NET INCOME attributable to common shareholders	$ 69,508	$ 41,135	$ 91,913	$ 399,215	$ 243,414	$ 95,192	$ 57,840	$ 200,285	601,771	596,731	49,093
Earnings allocated to unvested participating securities									(221)	(120)	(184)
Numerator for basic income per share									601,550	596,611	48,909
Convertible preferred share dividends - Numerator									124	160	0
Numerator for diluted income per share									$ 601,674	$ 596,771	$ 48,909
Denominator for basic income per share - weighted average shares									184,308	182,340	171,595
Employee stock options and restricted share awards									1,658	1,748	1,908
Convertible preferred shares - Denominator									55	71	0
Weighted Average Number of Shares Outstanding, Diluted, Total									186,021	184,159	173,503
Income from continuing operations, net									$ 2.52	$ 3.31	$ 0.01
Income (loss) from discontinued operations, net									0.74	(0.04)	0.27
Net income per common share	$ 0.38	$ 0.22	$ 0.50	$ 2.17	$ 1.33	$ 0.52	$ 0.32	$ 1.10	3.26	3.27	0.28
Income from continuing operations, net									2.50	3.28	0.01
Income (loss) from discontinued operations, net									0.73	(0.04)	0.27
Net income per common share	$ 0.37	$ 0.22	$ 0.49	$ 2.12	$ 1.31	$ 0.52	$ 0.31	$ 1.09	$ 3.23	$ 3.24	$ 0.28

Leases (Details) $ in Thousands	12 Months Ended
Leases (Details) $ in Thousands	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Operating Leases Future Minimum Payments Receivable Abstract
2012	$ 1,807,885
2013	1,718,403
2014	1,609,279
2015	1,425,804
2016	1,232,154
Thereafter	$ 6,045,584
Number Of Tenants Contributing Ten Percent Or More Of Total Revenues	0
Percentage Rent	$ 8,482	$ 7,912	$ 8,394
Additional Rent Due Annually From Tenant	5,000
Additional Rent Due From Tenant	41,983
Operating Leases Future Minimum Payments Due Abstract
2012	31,472
2013	31,666
2014	31,945
2015	30,596
2016	26,470
Thereafter	1,037,730
Rent Expense	37,177	36,417	$ 35,011
Capital Leases Future Minimum Payments Due Abstract
2012	707
2013	706
2014	707
2015	706
2016	707
Thereafter	16,014
Total Minimum Obligations	19,547
Interest Portion	12,876
Present Value Of Net Minimum Payments	$ 6,671	6,714
Capital Lease Terms	5-20
Property Leased Under Capital Leases Cost	$ 6,216	6,216
Property Leased Under Capital Leases Accumulated Depreciation	$ 2,184	$ 2,029

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
Segment Information (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Property rentals									$ 2,157,938	$ 2,099,158	$ 1,989,169
Straight Line Rent Adjustments									41,431	73,007	89,405
Amortization of acquired below-market leases, net									62,442	65,542	70,401
Operating Leases, Income Statement, Lease Revenue, Total									2,261,811	2,237,707	2,148,975
Tenant expense reimbursements									349,420	355,616	351,290
Cleveland Medical Mart development project									154,080	0	0
BMS cleaning fees									61,754	58,053	53,824
Management and leasing fees									20,103	20,117	11,456
Lease termination fees									16,395	14,826	4,886
Other									52,102	54,362	85,160
Total Revenues	$ 741,815	$ 727,343	$ 719,624	$ 726,883	$ 702,836	$ 687,125	$ 674,192	$ 676,528	2,915,665	2,740,681	2,655,591
Operating									1,091,597	1,082,844	1,050,545
Depreciation and amortization									553,811	522,022	519,534
General and administrative									209,981	213,949	230,584
Cleveland Medical Mart development project									145,824	0	0
Tenant buy-outs, impairment losses and other acquisition related costs									58,299	129,458	73,763
Total expenses									2,059,512	1,948,273	1,874,426
Operating income									856,153	792,408	781,165
Income from partially owned entities									120,310	94,062	72,390
Income (loss) from Real Estate Fund (of which $13,598 and $(806), respectively, are attributable to noncontrolling interests)									22,886	(303)	0
Interest and other investment (loss) income, net									148,826	235,315	(116,350)
Interest and debt expense (including amortization of deferred financing costs of $20,729, $18,542 and $17,593 respectively)									(544,015)	(560,052)	(617,768)
Net gain on early extinguishment of debt									0	94,789	(25,915)
Net gain on disposition of wholly owned and partially owned assets other than depreciable real estate									15,134	81,432	5,641
Income before income taxes									619,294	737,651	99,163
Income tax expense									(24,827)	(22,476)	(20,642)
Income from continuing operations									594,467	715,175	78,521
Income (loss) from discontinued operations									145,533	(7,144)	49,929
Net income									740,000	708,031	128,450
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries									(21,786)	(4,920)	2,839
Net (income) attributable to noncontrolling interests in the Operating Partnership, including unit distributions									(55,912)	(55,228)	(25,120)
Net income (loss) attributable to Common Shareholders									662,302	647,883	106,169
Interest and debt expense (2)									797,920	828,082	826,827
Depreciation and amortization (2)									777,421	729,426	728,815
Income tax (benefit) expense (2)									4,812	(23,036)	10,193
EBITDA									2,242,455	2,182,355	1,672,004
Balance Sheet Data [Abstract]
Real estate at cost	17,627,011				17,387,701				17,627,011	17,387,701	17,293,970	$ 17,140,726
Investments in partially owned entities	1,740,459				1,375,006				1,740,459	1,375,006	1,209,285
Total assets	20,446,487				20,517,471				20,446,487	20,517,471	20,185,472
Toys R Us [Member]
Income from partially owned entities									48,540	71,624	92,300
Balance Sheet Data [Abstract]
Investments in partially owned entities	506,809				447,334				506,809	447,334
All Equity Method Investees Excluding Toys [Member]
Income from partially owned entities									71,770	22,438	(19,910)
Balance Sheet Data [Abstract]
Investments in partially owned entities	1,233,650				927,672				1,233,650	927,672
New York Office [Member]
Property rentals									783,438	773,996	757,372
Straight Line Rent Adjustments									25,720	34,197	36,832
Amortization of acquired below-market leases, net									31,547	36,164	39,474
Operating Leases, Income Statement, Lease Revenue, Total									840,705	844,357	833,678
Tenant expense reimbursements									140,038	137,412	136,368
Cleveland Medical Mart development project									0
BMS cleaning fees									95,452	88,664	75,549
Management and leasing fees									7,394	6,192	4,211
Lease termination fees									11,539	4,270	1,840
Other									22,189	22,283	18,868
Total Revenues									1,117,317	1,103,178	1,070,514
Operating									485,731	469,495	451,977
Depreciation and amortization									186,765	176,534	173,433
General and administrative									18,815	18,578	22,662
Cleveland Medical Mart development project									0
Tenant buy-outs, impairment losses and other acquisition related costs									0	0	0
Total expenses									691,311	664,607	648,072
Operating income									426,006	438,571	422,442
Income from partially owned entities									(12,559)	(6,354)	5,817
Income (loss) from Real Estate Fund (of which $13,598 and $(806), respectively, are attributable to noncontrolling interests)									0	0
Interest and other investment (loss) income, net									642	608	876
Interest and debt expense (including amortization of deferred financing costs of $20,729, $18,542 and $17,593 respectively)									(138,336)	(132,279)	(133,647)
Net gain on early extinguishment of debt										0	0
Net gain on disposition of wholly owned and partially owned assets other than depreciable real estate									0	0	0
Income before income taxes									275,753	300,546	295,488
Income tax expense									(2,084)	(2,167)	(1,332)
Income from continuing operations									273,669	298,379	294,156
Income (loss) from discontinued operations									563	168	945
Net income									274,232	298,547	295,101
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries									(10,042)	(9,559)	(9,098)
Net (income) attributable to noncontrolling interests in the Operating Partnership, including unit distributions									0	0	0
Net income (loss) attributable to Common Shareholders									264,190	288,988	286,003
Interest and debt expense (2)									150,627	126,209	126,968
Depreciation and amortization (2)									201,122	170,505	168,517
Income tax (benefit) expense (2)									2,204	2,167	1,332
EBITDA									618,143	587,869	582,820
Balance Sheet Data [Abstract]
Real estate at cost	5,554,964				5,505,010				5,554,964	5,505,010	5,421,640
Investments in partially owned entities	355,499				97,743				355,499	97,743	128,961
Total assets	6,244,822				5,743,781				6,244,822	5,743,781	5,538,362
New York Office [Member] \| Toys R Us [Member]
Income from partially owned entities									0	0	0
New York Office [Member] \| All Equity Method Investees Excluding Toys [Member]
Income from partially owned entities									(12,559)	(6,354)	5,817
Washington DC Office [Member]
Property rentals									558,256	566,041	526,683
Straight Line Rent Adjustments									(721)	5,849	22,683
Amortization of acquired below-market leases, net									2,088	2,326	3,452
Operating Leases, Income Statement, Lease Revenue, Total									559,623	574,216	552,818
Tenant expense reimbursements									36,849	51,963	60,620
Cleveland Medical Mart development project									0
BMS cleaning fees									0	0	0
Management and leasing fees									12,361	15,934	8,183
Lease termination fees									3,794	1,148	2,224
Other									20,650	21,427	47,745
Total Revenues									633,277	664,688	671,590
Operating									200,677	213,935	220,333
Depreciation and amortization									160,729	142,720	142,415
General and administrative									26,380	25,464	26,205
Cleveland Medical Mart development project									0
Tenant buy-outs, impairment losses and other acquisition related costs									0	0	24,875
Total expenses									387,786	382,119	413,828
Operating income									245,491	282,569	257,762
Income from partially owned entities									(6,381)	(564)	4,850
Income (loss) from Real Estate Fund (of which $13,598 and $(806), respectively, are attributable to noncontrolling interests)									0	0
Interest and other investment (loss) income, net									199	157	786
Interest and debt expense (including amortization of deferred financing costs of $20,729, $18,542 and $17,593 respectively)									(120,724)	(130,540)	(128,039)
Net gain on early extinguishment of debt										0	0
Net gain on disposition of wholly owned and partially owned assets other than depreciable real estate									0	54,742	0
Income before income taxes									118,585	206,364	135,359
Income tax expense									(2,927)	(1,816)	(1,482)
Income from continuing operations									115,658	204,548	133,877
Income (loss) from discontinued operations									46,466	(4,481)	52,308
Net income									162,124	200,067	186,185
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries									0	0	0
Net (income) attributable to noncontrolling interests in the Operating Partnership, including unit distributions									0	0	0
Net income (loss) attributable to Common Shareholders									162,124	200,067	186,185
Interest and debt expense (2)									134,270	136,174	132,610
Depreciation and amortization (2)									181,560	159,283	152,747
Income tax (benefit) expense (2)									3,123	2,027	1,590
EBITDA									481,077	497,551	473,132
Balance Sheet Data [Abstract]
Real estate at cost	4,373,361				4,237,438				4,373,361	4,237,438	4,593,749
Investments in partially owned entities	113,536				149,295				113,536	149,295	119,182
Total assets	4,150,140				3,872,209				4,150,140	3,872,209	4,138,752
Washington DC Office [Member] \| Toys R Us [Member]
Income from partially owned entities									0	0	0
Washington DC Office [Member] \| All Equity Method Investees Excluding Toys [Member]
Income from partially owned entities									(6,381)	(564)	4,850
Retail [Member]
Property rentals									424,646	390,068	354,397
Straight Line Rent Adjustments									16,319	28,604	26,943
Amortization of acquired below-market leases, net									23,751	21,470	22,095
Operating Leases, Income Statement, Lease Revenue, Total									464,716	440,142	403,435
Tenant expense reimbursements									150,338	144,224	132,385
Cleveland Medical Mart development project									0
BMS cleaning fees									0	0	0
Management and leasing fees									3,071	1,029	1,731
Lease termination fees									767	7,641	464
Other									5,966	3,674	2,565
Total Revenues									624,858	596,710	540,580
Operating									205,385	220,090	200,457
Depreciation and amortization									114,360	108,156	99,217
General and administrative									28,098	29,610	30,339
Cleveland Medical Mart development project									0
Tenant buy-outs, impairment losses and other acquisition related costs									24,146	72,500	9,589
Total expenses									371,989	430,356	339,602
Operating income									252,869	166,354	200,978
Income from partially owned entities									4,006	9,401	4,728
Income (loss) from Real Estate Fund (of which $13,598 and $(806), respectively, are attributable to noncontrolling interests)									0	0
Interest and other investment (loss) income, net									(29)	180	69
Interest and debt expense (including amortization of deferred financing costs of $20,729, $18,542 and $17,593 respectively)									(91,895)	(85,063)	(88,844)
Net gain on early extinguishment of debt										105,571	769
Net gain on disposition of wholly owned and partially owned assets other than depreciable real estate									4,278	0	0
Income before income taxes									169,229	196,443	117,700
Income tax expense									(34)	(37)	(319)
Income from continuing operations									169,195	196,406	117,381
Income (loss) from discontinued operations									4,000	2,453	(3,430)
Net income									173,195	198,859	113,951
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries									237	(778)	915
Net (income) attributable to noncontrolling interests in the Operating Partnership, including unit distributions									0	0	0
Net income (loss) attributable to Common Shareholders									173,432	198,081	114,866
Interest and debt expense (2)									96,644	92,653	95,990
Depreciation and amortization (2)									117,716	114,335	105,903
Income tax (benefit) expense (2)									34	37	319
EBITDA									387,826	405,106	317,078
Balance Sheet Data [Abstract]
Real estate at cost	4,828,536				4,782,697				4,828,536	4,782,697	4,517,625
Investments in partially owned entities	13,264				11,831				13,264	11,831	22,955
Total assets	4,438,198				4,284,871				4,438,198	4,284,871	3,511,987
Retail [Member] \| Toys R Us [Member]
Income from partially owned entities									0	0	0
Retail [Member] \| All Equity Method Investees Excluding Toys [Member]
Income from partially owned entities									4,006	9,401	4,728
Merchandise Mart [Member]
Property rentals									208,059	199,323	191,485
Straight Line Rent Adjustments									(2,680)	382	2,478
Amortization of acquired below-market leases, net									38	(75)	89
Operating Leases, Income Statement, Lease Revenue, Total									205,417	199,630	194,052
Tenant expense reimbursements									11,602	11,059	12,079
Cleveland Medical Mart development project									154,080
BMS cleaning fees									0	0	0
Management and leasing fees									342	156	88
Lease termination fees									295	467	219
Other									3,558	3,838	7,528
Total Revenues									375,294	215,150	213,966
Operating									132,470	114,161	113,078
Depreciation and amortization									41,094	40,130	41,587
General and administrative									29,996	26,720	30,749
Cleveland Medical Mart development project									145,824
Tenant buy-outs, impairment losses and other acquisition related costs									28,228	20,000	0
Total expenses									377,612	201,011	185,414
Operating income									(2,318)	14,139	28,552
Income from partially owned entities									455	(179)	151
Income (loss) from Real Estate Fund (of which $13,598 and $(806), respectively, are attributable to noncontrolling interests)									0	0
Interest and other investment (loss) income, net									43	47	95
Interest and debt expense (including amortization of deferred financing costs of $20,729, $18,542 and $17,593 respectively)									(36,873)	(37,932)	(38,009)
Net gain on early extinguishment of debt										0	0
Net gain on disposition of wholly owned and partially owned assets other than depreciable real estate									0	765	0
Income before income taxes									(38,693)	(23,160)	(9,211)
Income tax expense									(2,237)	(173)	(2,140)
Income from continuing operations									(40,930)	(23,333)	(11,351)
Income (loss) from discontinued operations									94,504	(5,284)	106
Net income									53,574	(28,617)	(11,245)
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries									0	0	0
Net (income) attributable to noncontrolling interests in the Operating Partnership, including unit distributions									0	0	0
Net income (loss) attributable to Common Shareholders									53,574	(28,617)	(11,245)
Interest and debt expense (2)									40,916	61,379	52,862
Depreciation and amortization (2)									46,725	51,064	56,702
Income tax (benefit) expense (2)									2,237	232	2,208
EBITDA									143,452	84,058	100,527
Balance Sheet Data [Abstract]
Real estate at cost	963,811				970,417				963,811	970,417	992,290
Investments in partially owned entities	3,589				4,183				3,589	4,183	6,520
Total assets	1,226,084				1,435,714				1,226,084	1,435,714	1,455,000
Merchandise Mart [Member] \| Toys R Us [Member]
Income from partially owned entities									0	0	0
Merchandise Mart [Member] \| All Equity Method Investees Excluding Toys [Member]
Income from partially owned entities									455	(179)	151
Toys R Us Segment [Member]
Property rentals									0	0	0
Straight Line Rent Adjustments									0	0	0
Amortization of acquired below-market leases, net									0	0	0
Operating Leases, Income Statement, Lease Revenue, Total									0	0	0
Tenant expense reimbursements									0	0	0
Cleveland Medical Mart development project									0
BMS cleaning fees									0	0	0
Management and leasing fees									0	0	0
Lease termination fees									0	0	0
Other									0	0	0
Total Revenues									0	0	0
Operating									0	0	0
Depreciation and amortization									0	0	0
General and administrative									0	0	0
Cleveland Medical Mart development project									0
Tenant buy-outs, impairment losses and other acquisition related costs									0	0	0
Total expenses									0	0	0
Operating income									0	0	0
Income from partially owned entities									48,540	71,624	92,300
Income (loss) from Real Estate Fund (of which $13,598 and $(806), respectively, are attributable to noncontrolling interests)									0	0
Interest and other investment (loss) income, net									0	0	0
Interest and debt expense (including amortization of deferred financing costs of $20,729, $18,542 and $17,593 respectively)									0	0	0
Net gain on early extinguishment of debt										0	0
Net gain on disposition of wholly owned and partially owned assets other than depreciable real estate									0	0	0
Income before income taxes									48,540	71,624	92,300
Income tax expense									0	0	0
Income from continuing operations									48,540	71,624	92,300
Income (loss) from discontinued operations									0	0	0
Net income									48,540	71,624	92,300
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries									0	0	0
Net (income) attributable to noncontrolling interests in the Operating Partnership, including unit distributions									0	0	0
Net income (loss) attributable to Common Shareholders									48,540	71,624	92,300
Interest and debt expense (2)									157,135	177,272	127,390
Depreciation and amortization (2)									134,967	131,284	132,227
Income tax (benefit) expense (2)									(1,132)	(45,418)	(13,185)
EBITDA									339,510	334,762	338,732
Balance Sheet Data [Abstract]
Real estate at cost	0				0				0	0	0
Investments in partially owned entities	506,809				447,334				506,809	447,334	409,453
Total assets	506,809				447,334				506,809	447,334	409,453
Toys R Us Segment [Member] \| Toys R Us [Member]
Income from partially owned entities									48,540	71,624	92,300
Toys R Us Segment [Member] \| All Equity Method Investees Excluding Toys [Member]
Income from partially owned entities									0	0	0
Other Segment [Member]
Property rentals									183,539	169,730	159,232
Straight Line Rent Adjustments									2,793	3,975	469
Amortization of acquired below-market leases, net									5,018	5,657	5,291
Operating Leases, Income Statement, Lease Revenue, Total									191,350	179,362	164,992
Tenant expense reimbursements									10,593	10,958	9,838
Cleveland Medical Mart development project									0
BMS cleaning fees									(33,698)	(30,611)	(21,725)
Management and leasing fees									(3,065)	(3,194)	(2,757)
Lease termination fees									0	1,300	139
Other									(261)	3,140	8,454
Total Revenues									164,919	160,955	158,941
Operating									67,334	65,163	64,700
Depreciation and amortization									50,863	54,482	62,882
General and administrative									106,692	113,577	120,629
Cleveland Medical Mart development project									0
Tenant buy-outs, impairment losses and other acquisition related costs									5,925	36,958	39,299
Total expenses									230,814	270,180	287,510
Operating income									(65,895)	(109,225)	(128,569)
Income from partially owned entities									86,249	20,134	(35,456)
Income (loss) from Real Estate Fund (of which $13,598 and $(806), respectively, are attributable to noncontrolling interests)									22,886	(303)
Interest and other investment (loss) income, net									147,971	234,323	(118,176)
Interest and debt expense (including amortization of deferred financing costs of $20,729, $18,542 and $17,593 respectively)									(156,187)	(174,238)	(229,229)
Net gain on early extinguishment of debt										(10,782)	(26,684)
Net gain on disposition of wholly owned and partially owned assets other than depreciable real estate									10,856	25,925	5,641
Income before income taxes									45,880	(14,166)	(532,473)
Income tax expense									(17,545)	(18,283)	(15,369)
Income from continuing operations									28,335	(32,449)	(547,842)
Income (loss) from discontinued operations									0	0	0
Net income									28,335	(32,449)	(547,842)
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries									(11,981)	5,417	11,022
Net (income) attributable to noncontrolling interests in the Operating Partnership, including unit distributions									(55,912)	(55,228)	(25,120)
Net income (loss) attributable to Common Shareholders									(39,558)	(82,260)	(561,940)
Interest and debt expense (2)									218,328	234,395	291,007
Depreciation and amortization (2)									95,331	102,955	112,719
Income tax (benefit) expense (2)									(1,654)	17,919	17,929
EBITDA									272,447	273,009	(140,285)
Balance Sheet Data [Abstract]
Real estate at cost	1,906,339				1,892,139				1,906,339	1,892,139	1,768,666
Investments in partially owned entities	747,762				664,620				747,762	664,620	522,214
Total assets	$ 3,880,434				$ 4,733,562				3,880,434	4,733,562	5,131,918
Other Segment [Member] \| Toys R Us [Member]
Income from partially owned entities									0	0	0
Other Segment [Member] \| All Equity Method Investees Excluding Toys [Member]
Income from partially owned entities									$ 86,249	$ 20,134	$ (35,456)

SEC Schedule III Real Estate (Details) $ in Thousands	12 Months Ended
SEC Schedule III Real Estate (Details) $ in Thousands	Dec. 31, 2011 USD ($) Y
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 8,558,275
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,518,251
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,964,753
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,144,007
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,558,181
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,068,830
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	17,627,011
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,095,037
Property Plant And Equipment Useful Life Maximum \| Y	40
Net Basis Difference Of Assets And Liabilities Between Tax Basis And GAAP Basis	$ 3,600,000
New York Office 1290 Avenue Of Americas [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	413,111
Real Estate And Accumulated Depreciation Initial Cost Of Land	515,539
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	923,653
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	75,193
Real Estate And Accumulated Depreciation Carrying Amount Of Land	515,539
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	998,846
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,514,385
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 127,938
Real Estate And Accumulated Depreciation Date Of Construction	1963
Real Estate And Accumulated Depreciation Date Acquired	2007
New York Office 350 Park Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 430,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	265,889
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	363,381
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27,457
Real Estate And Accumulated Depreciation Carrying Amount Of Land	265,889
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	390,838
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	656,727
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 49,264
Real Estate And Accumulated Depreciation Date Of Construction	1960
Real Estate And Accumulated Depreciation Date Acquired	2006
New York Office One Penn Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	412,169
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	162,098
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	574,267
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	574,267
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 194,075
Real Estate And Accumulated Depreciation Date Of Construction	1972
Real Estate And Accumulated Depreciation Date Acquired	1998
New York Office Manhattan Mall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 159,361
Real Estate And Accumulated Depreciation Initial Cost Of Land	242,776
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	247,970
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,288
Real Estate And Accumulated Depreciation Carrying Amount Of Land	242,776
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	253,258
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	496,034
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 31,141
Real Estate And Accumulated Depreciation Date Of Construction	1911
Real Estate And Accumulated Depreciation Date Acquired	2007
New York Office Two Penn Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 425,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	53,615
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	164,903
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	78,476
Real Estate And Accumulated Depreciation Carrying Amount Of Land	52,689
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	244,305
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	296,994
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 101,246
Real Estate And Accumulated Depreciation Date Of Construction	1968
Real Estate And Accumulated Depreciation Date Acquired	1997
New York Office 770 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 353,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	52,898
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	95,686
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	73,968
Real Estate And Accumulated Depreciation Carrying Amount Of Land	52,898
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	169,654
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	222,552
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 58,810
Real Estate And Accumulated Depreciation Date Of Construction	1907
Real Estate And Accumulated Depreciation Date Acquired	1998
New York Office 90 Park Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	175,890
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	34,531
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	210,421
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	218,421
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 77,221
Real Estate And Accumulated Depreciation Date Of Construction	1964
Real Estate And Accumulated Depreciation Date Acquired	1997
New York Office 888 Seventh Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 318,554
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	117,269
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	94,096
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	211,365
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	211,365
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 75,888
Real Estate And Accumulated Depreciation Date Of Construction	1980
Real Estate And Accumulated Depreciation Date Acquired	1998
New York Office 640 Fifth Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	38,224
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	25,992
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	112,598
Real Estate And Accumulated Depreciation Carrying Amount Of Land	38,224
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	138,590
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	176,814
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 51,821
Real Estate And Accumulated Depreciation Date Of Construction	1950
Real Estate And Accumulated Depreciation Date Acquired	1997
New York Office Eleven Penn Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 330,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	40,333
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	85,259
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	49,183
Real Estate And Accumulated Depreciation Carrying Amount Of Land	40,333
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	134,442
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	174,775
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 50,168
Real Estate And Accumulated Depreciation Date Of Construction	1923
Real Estate And Accumulated Depreciation Date Acquired	1997
New York Office 1740 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	26,971
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	102,890
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	36,896
Real Estate And Accumulated Depreciation Carrying Amount Of Land	26,971
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	139,786
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	166,757
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 47,179
Real Estate And Accumulated Depreciation Date Of Construction	1950
Real Estate And Accumulated Depreciation Date Acquired	1997
New York Office 909 Third Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 203,217
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	120,723
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	55,860
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	176,583
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	176,583
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 49,222
Real Estate And Accumulated Depreciation Date Of Construction	1969
Real Estate And Accumulated Depreciation Date Acquired	1999
New York Office 150 East 58th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	39,303
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	80,216
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	28,228
Real Estate And Accumulated Depreciation Carrying Amount Of Land	39,303
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	108,444
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	147,747
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 38,427
Real Estate And Accumulated Depreciation Date Of Construction	1969
Real Estate And Accumulated Depreciation Date Acquired	1998
New York Office 595 Madison Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	62,731
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	62,888
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	17,444
Real Estate And Accumulated Depreciation Carrying Amount Of Land	62,731
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	80,332
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	143,063
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 23,464
Real Estate And Accumulated Depreciation Date Of Construction	1968
Real Estate And Accumulated Depreciation Date Acquired	1999
New York Office 866 UN Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 44,978
Real Estate And Accumulated Depreciation Initial Cost Of Land	32,196
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	37,534
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	8,335
Real Estate And Accumulated Depreciation Carrying Amount Of Land	32,196
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	45,869
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	78,065
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 17,376
Real Estate And Accumulated Depreciation Date Of Construction	1966
Real Estate And Accumulated Depreciation Date Acquired	1997
New York Office 20 Broad Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	28,760
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	26,924
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	55,684
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	55,684
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,914
Real Estate And Accumulated Depreciation Date Of Construction	1956
Real Estate And Accumulated Depreciation Date Acquired	1998
New York Office 40 Fulton Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,732
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,388
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	12,266
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,732
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	38,654
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	54,386
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 12,548
Real Estate And Accumulated Depreciation Date Of Construction	1987
Real Estate And Accumulated Depreciation Date Acquired	1998
New York Office 689 Fifth Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,721
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,446
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10,938
Real Estate And Accumulated Depreciation Carrying Amount Of Land	19,721
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	24,384
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	44,105
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 10,476
Real Estate And Accumulated Depreciation Date Of Construction	1925
Real Estate And Accumulated Depreciation Date Acquired	1998
New York Office 330 West 34th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,599
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	6,936
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	15,535
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,535
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,700
Real Estate And Accumulated Depreciation Date Of Construction	1925
Real Estate And Accumulated Depreciation Date Acquired	1998
New York Office 1540 Broadway Garage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,086
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,914
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,086
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,914
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	13,000
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,235
Real Estate And Accumulated Depreciation Date Of Construction	1990
Real Estate And Accumulated Depreciation Date Acquired	2006
New York Office Other [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,548
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	67,113
Real Estate And Accumulated Depreciation Carrying Amount Of Land	36,106
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	36,555
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	72,661
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,794
New York Office Total [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	2,677,221
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,418,014
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,108,078
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	983,828
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,453,194
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,056,726
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,509,920
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,043,907
Washington DC Office 2011-2451 Crystal Drive [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	274,305
Real Estate And Accumulated Depreciation Initial Cost Of Land	100,935
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	409,920
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	115,837
Real Estate And Accumulated Depreciation Carrying Amount Of Land	100,228
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	526,464
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	626,692
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 149,944
Real Estate And Accumulated Depreciation Date Of Construction	1984-1989
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 2001 Jefferson Davis Highway, 2100/2200 Crystal Drive, 223 23rd Street, 2221 South Clark Street, Crystal City Shops At 2100 And 220 20th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 75,037
Real Estate And Accumulated Depreciation Initial Cost Of Land	57,213
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	131,206
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	186,549
Real Estate And Accumulated Depreciation Carrying Amount Of Land	57,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	317,898
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	374,968
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 68,079
Real Estate And Accumulated Depreciation Date Of Construction	1964-1969
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 1550-1750 Crystal Drive/ 241-251 18th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 121,067
Real Estate And Accumulated Depreciation Initial Cost Of Land	64,817
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	218,330
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	58,625
Real Estate And Accumulated Depreciation Carrying Amount Of Land	64,652
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	277,120
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	341,772
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 85,657
Real Estate And Accumulated Depreciation Date Of Construction	1974-1980
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office River House Apartments [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 259,546
Real Estate And Accumulated Depreciation Initial Cost Of Land	118,421
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	125,078
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	57,582
Real Estate And Accumulated Depreciation Carrying Amount Of Land	138,696
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	162,385
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	301,081
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 19,248
Real Estate And Accumulated Depreciation Date Acquired	2007
Washington DC Office Skyline Place [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 442,500
Real Estate And Accumulated Depreciation Initial Cost Of Land	41,986
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	221,869
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27,343
Real Estate And Accumulated Depreciation Carrying Amount Of Land	41,862
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	249,336
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	291,198
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 67,946
Real Estate And Accumulated Depreciation Date Of Construction	1973-1984
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 1215, 1225 S. Clark Street/ 200, 201 12th Street S. [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 90,191
Real Estate And Accumulated Depreciation Initial Cost Of Land	47,594
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	177,373
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27,015
Real Estate And Accumulated Depreciation Carrying Amount Of Land	47,465
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	204,517
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	251,982
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 59,451
Real Estate And Accumulated Depreciation Date Of Construction	1983-1987
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 1800, 1851 And 1901 South Bell Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	37,551
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	118,806
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	32,899
Real Estate And Accumulated Depreciation Carrying Amount Of Land	37,551
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	151,705
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	189,256
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 66,789
Real Estate And Accumulated Depreciation Date Of Construction	1968
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 2101 L Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 150,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	32,815
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	51,642
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	82,632
Real Estate And Accumulated Depreciation Carrying Amount Of Land	39,768
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	127,321
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	167,089
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,783
Real Estate And Accumulated Depreciation Date Of Construction	1975
Real Estate And Accumulated Depreciation Date Acquired	2003
Washington DC Office 1229-1231 25th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 101,671
Real Estate And Accumulated Depreciation Initial Cost Of Land	67,049
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,039
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	105,574
Real Estate And Accumulated Depreciation Carrying Amount Of Land	68,198
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	109,464
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	177,662
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,851
Real Estate And Accumulated Depreciation Date Acquired	2007
Washington DC Office 2200-2300 Courthouse Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 53,344
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	105,475
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	29,342
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	134,817
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	134,817
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 38,724
Real Estate And Accumulated Depreciation Date Of Construction	1988-1989
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office Bowen Building [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 115,022
Real Estate And Accumulated Depreciation Initial Cost Of Land	30,077
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	98,962
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,287
Real Estate And Accumulated Depreciation Carrying Amount Of Land	30,176
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	100,150
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	130,326
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,584
Real Estate And Accumulated Depreciation Date Of Construction	2004
Real Estate And Accumulated Depreciation Date Acquired	2005
Washington DC Office 1875 Connecticut Avenue NW [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 49,433
Real Estate And Accumulated Depreciation Initial Cost Of Land	36,303
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	82,004
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,459
Real Estate And Accumulated Depreciation Carrying Amount Of Land	35,886
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	85,880
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	121,766
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 13,104
Real Estate And Accumulated Depreciation Date Of Construction	1963
Real Estate And Accumulated Depreciation Date Acquired	2007
Washington DC Office One Skyline Tower [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 134,700
Real Estate And Accumulated Depreciation Initial Cost Of Land	12,266
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	75,343
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	32,911
Real Estate And Accumulated Depreciation Carrying Amount Of Land	12,231
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	108,289
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	120,520
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 27,483
Real Estate And Accumulated Depreciation Date Of Construction	1988
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office Reston Executive I, II, And III [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 93,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,424
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	85,722
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,084
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,380
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	94,850
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	110,230
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 27,272
Real Estate And Accumulated Depreciation Date Of Construction	1987-1989
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office H Street North 10 1 D Land Parcel [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	104,473
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	55
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(11,356)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	87,666
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,506
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	93,172
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Acquired	2007
Washington DC Office 409 3rd Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,719
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	69,658
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,826
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,719
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	75,484
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	86,203
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 26,065
Real Estate And Accumulated Depreciation Date Of Construction	1990
Real Estate And Accumulated Depreciation Date Acquired	1998
Washington DC Office 1825 Connecticut Avenue NW [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 48,806
Real Estate And Accumulated Depreciation Initial Cost Of Land	33,090
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	61,316
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(5,595)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	32,726
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	56,085
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	88,811
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,613
Real Estate And Accumulated Depreciation Date Of Construction	1956
Real Estate And Accumulated Depreciation Date Acquired	2007
Washington DC Office Warehouses [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	106,946
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,326
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(22,901)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	83,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,971
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	85,371
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,333
Real Estate And Accumulated Depreciation Date Acquired	2007
Washington DC Office Commerce Executive [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,401
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	58,705
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	13,422
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,363
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	72,165
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	85,528
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 20,285
Real Estate And Accumulated Depreciation Date Of Construction	1985-1989
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 1235 Clark Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 51,309
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,826
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	53,894
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	14,959
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,826
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	68,853
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	84,679
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,722
Real Estate And Accumulated Depreciation Date Of Construction	1981
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office Seven Skyline Place [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 100,800
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,292
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	58,351
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(6,499)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,262
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	51,882
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	62,144
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 13,792
Real Estate And Accumulated Depreciation Date Of Construction	2001
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 1150 17th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 28,728
Real Estate And Accumulated Depreciation Initial Cost Of Land	23,359
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	24,876
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	14,551
Real Estate And Accumulated Depreciation Carrying Amount Of Land	24,723
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	38,063
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	62,786
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 12,237
Real Estate And Accumulated Depreciation Date Of Construction	1970
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office Crystal City Hotel [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	47,191
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	7,176
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	54,367
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	62,367
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 9,602
Real Estate And Accumulated Depreciation Date Of Construction	1968
Real Estate And Accumulated Depreciation Date Acquired	2004
Washington DC Office 1750 Pennsylvania Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 44,330
Real Estate And Accumulated Depreciation Initial Cost Of Land	20,020
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	30,032
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	256
Real Estate And Accumulated Depreciation Carrying Amount Of Land	21,170
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	29,138
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	50,308
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 7,656
Real Estate And Accumulated Depreciation Date Of Construction	1964
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 1730 M Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 14,853
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,095
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	17,541
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,449
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,687
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,398
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	37,085
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,457
Real Estate And Accumulated Depreciation Date Of Construction	1963
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office Democracy Plaza I [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	33,628
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(1,366)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	32,262
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	32,262
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 12,459
Real Estate And Accumulated Depreciation Date Of Construction	1987
Real Estate And Accumulated Depreciation Date Acquired	2002
Washington DC Office 1726 M Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	9,450
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	22,062
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,539
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,455
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	24,596
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	34,051
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,391
Real Estate And Accumulated Depreciation Date Of Construction	1964
Real Estate And Accumulated Depreciation Date Acquired	2006
Washington DC Office Crystal Drive Retail [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,465
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,799
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,264
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	26,264
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,011
Real Estate And Accumulated Depreciation Date Of Construction	2004
Real Estate And Accumulated Depreciation Date Acquired	2004
Washington DC Office 1109 South Capitol Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,541
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	178
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,597
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	126
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,723
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 178
Real Estate And Accumulated Depreciation Date Acquired	2007
Washington DC Office South Capitol [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,009
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,273
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(2,753)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,529
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,529
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Acquired	2005
Washington DC Office H-Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,763
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	641
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	41
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,763
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	682
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,445
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 108
Real Estate And Accumulated Depreciation Date Acquired	2005
Washington DC Office Executive Tower [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	33,481
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	67,363
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	33,481
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	67,363
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	100,844
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Acquired	2011
Washington DC Other [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	51,767
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(42,015)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,752
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,752
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Washington DC Office Total [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	2,248,642
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,078,916
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,532,091
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	751,676
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,064,001
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,298,682
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,362,683
Real Estate And Accumulated Depreciation Accumulated Depreciation	811,824
Paramus Building [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	23,785
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,033
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	22,752
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	23,785
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 14,279
Real Estate And Accumulated Depreciation Date Of Construction	1967
Real Estate And Accumulated Depreciation Date Acquired	1987
California Street 555 [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 600,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	221,903
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	893,324
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	38,055
Real Estate And Accumulated Depreciation Carrying Amount Of Land	221,903
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	931,379
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,153,282
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 118,824
Real Estate And Accumulated Depreciation Date Of Construction	1922/1969/1970
Real Estate And Accumulated Depreciation Date Acquired	2007
Total Office Buildings [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 5,525,863
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,718,833
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,533,493
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,797,344
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,740,131
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,309,539
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,049,670
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,988,834
Retail Beverly Connection [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	100,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	72,996
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	131,510
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	21,592
Real Estate And Accumulated Depreciation Carrying Amount Of Land	72,996
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	153,102
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	226,098
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 18,335
Real Estate And Accumulated Depreciation Date Of Construction	2008
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail CA San Jose [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 112,476
Real Estate And Accumulated Depreciation Initial Cost Of Land	42,836
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	104,262
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	329
Real Estate And Accumulated Depreciation Carrying Amount Of Land	42,836
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	104,591
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	147,427
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,584
Real Estate And Accumulated Depreciation Date Of Construction	2008
Real Estate And Accumulated Depreciation Date Acquired	2010
Retail CA Walnut Creek (1149 S. Main Street) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,699
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	19,930
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,699
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,930
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	22,629
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,066
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail CA Pasadena [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	18,337
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	747
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,084
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	19,084
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,361
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail CA San Francisco (3700 Geary Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,857
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,444
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,857
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,471
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,328
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 693
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail CA Signal Hill [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	9,652
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,940
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,652
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,941
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,593
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 386
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail CA Walnut Creek (1556 Mount Diablo Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,909
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,057
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,908
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,058
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	6,966
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail CA Redding [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,900
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,857
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	483
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,340
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	6,240
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 420
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail CA Merced [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,725
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,907
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	215
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,725
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,122
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,847
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 368
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail CA San Bernadino (1522 E. Highland Ave) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,651
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,810
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,651
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,810
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,461
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 336
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Corona [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,073
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,073
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,073
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 570
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Vallejo [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,945
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,945
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,945
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 384
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail CA San Bernadino (648 W. 4th Street) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,597
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,119
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,597
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,119
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,716
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 208
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Mojave [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,250
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,250
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,250
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 417
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Barstow [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	856
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,367
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	856
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,367
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,223
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 254
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Colton (1904 Ranchero Ave) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,239
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	954
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,239
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	954
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,193
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 177
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Moreno Valley [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	639
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,156
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	639
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,156
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,795
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 214
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Rialto [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	434
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,173
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	434
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,173
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,607
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 217
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Desert Hot Springs [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	197
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,355
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	197
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,355
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,552
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 251
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Yucaipa [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	663
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	426
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	663
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	426
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,089
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 79
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Riverside (5571 Mission Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	209
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	704
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	209
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	704
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	913
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 131
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail CA Total California [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 212,476
Real Estate And Accumulated Depreciation Initial Cost Of Land	158,059
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	304,519
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	24,451
Real Estate And Accumulated Depreciation Carrying Amount Of Land	158,058
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	328,971
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	487,029
Real Estate And Accumulated Depreciation Accumulated Depreciation	32,451
Retail CT Waterbury [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	14,501
Real Estate And Accumulated Depreciation Initial Cost Of Land	667
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,504
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,852
Real Estate And Accumulated Depreciation Carrying Amount Of Land	667
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,356
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	10,023
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,669
Real Estate And Accumulated Depreciation Date Of Construction	1969
Real Estate And Accumulated Depreciation Date Acquired	1969
Retail CT Newington [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 11,657
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,421
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,200
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	951
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,421
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,151
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,572
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 732
Real Estate And Accumulated Depreciation Date Of Construction	1965
Real Estate And Accumulated Depreciation Date Acquired	1965
Retail CT Total Connecticut [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 26,158
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,088
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,704
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,803
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,088
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	11,507
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	14,595
Real Estate And Accumulated Depreciation Accumulated Depreciation	6,401
Retail FL Tampa (Hyde Park) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	19,876
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	23,293
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	12,494
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	35,787
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	43,787
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,823
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail FL Tampa [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,651
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,388
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,134
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,650
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,523
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,173
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 569
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail FL Total Florida [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 19,876
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,651
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	25,681
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	14,628
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,650
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	40,310
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	51,960
Real Estate And Accumulated Depreciation Accumulated Depreciation	6,392
Retail IL Lansing [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,135
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,064
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	71
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,135
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,135
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,270
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 145
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail IA Dubuque [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,479
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,479
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,479
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 193
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail MD Rockville [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,470
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,599
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	100
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,470
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	20,699
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	24,169
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,517
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail MD Baltimore (Towson) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 16,207
Real Estate And Accumulated Depreciation Initial Cost Of Land	581
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,227
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	8,682
Real Estate And Accumulated Depreciation Carrying Amount Of Land	581
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	11,909
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,490
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,390
Real Estate And Accumulated Depreciation Date Of Construction	1968
Real Estate And Accumulated Depreciation Date Acquired	1968
Retail MD Annapolis [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,203
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail MD Wheaton [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,367
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,367
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,367
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 704
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail MD Glen Burnie [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	462
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,571
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	586
Real Estate And Accumulated Depreciation Carrying Amount Of Land	462
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,157
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,619
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,703
Real Estate And Accumulated Depreciation Date Of Construction	1958
Real Estate And Accumulated Depreciation Date Acquired	1958
Retail MD Total Maryland [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 16,207
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,513
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	41,416
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,368
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,513
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	50,784
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	55,297
Real Estate And Accumulated Depreciation Accumulated Depreciation	13,517
Retail MA Dorchester [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	12,844
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,794
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(3)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	12,841
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,794
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,635
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 498
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail MA Springfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 5,942
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,797
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,471
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	578
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,797
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,049
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,846
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 740
Real Estate And Accumulated Depreciation Date Of Construction	1993
Real Estate And Accumulated Depreciation Date Acquired	1966
Retail MA Chicopee [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 8,615
Real Estate And Accumulated Depreciation Initial Cost Of Land	895
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	895
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	895
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Of Construction	1969
Real Estate And Accumulated Depreciation Date Acquired	1969
Retail MA Cambridge [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	260
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	260
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	260
Real Estate And Accumulated Depreciation Accumulated Depreciation	94
Retail MA Total Massachusetts [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	14,557
Real Estate And Accumulated Depreciation Initial Cost Of Land	16,536
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,265
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	835
Real Estate And Accumulated Depreciation Carrying Amount Of Land	16,533
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,103
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	23,636
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,332
Retail MI Roseville [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	30
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,128
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,465
Real Estate And Accumulated Depreciation Carrying Amount Of Land	30
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,593
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,623
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,787
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail MI Battle Creek [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,264
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,144
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(2,443)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	264
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	701
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	965
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 92
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail MI Midland [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	133
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	86
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	219
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	219
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 72
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail MI Total Michigan [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,294
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,405
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(892)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	294
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,513
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,807
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,951
Retail NH Salem [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,083
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,083
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	6,083
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail Bergen Town Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 283,590
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,884
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	81,723
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	366,325
Real Estate And Accumulated Depreciation Carrying Amount Of Land	37,635
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	430,297
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	467,932
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 42,648
Real Estate And Accumulated Depreciation Date Of Construction	1957/2009
Real Estate And Accumulated Depreciation Date Acquired	2003
Retail NJ North Bergen (Tonnelle Ave) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 75,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	24,493
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	63,376
Real Estate And Accumulated Depreciation Carrying Amount Of Land	31,806
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	56,063
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	87,869
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,324
Real Estate And Accumulated Depreciation Date Of Construction	2009
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail NJ Union (Springfield Avenue) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 29,570
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	45,090
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	19,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	45,090
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	64,790
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,166
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NJ East Rutherford [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 14,103
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	36,727
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(1)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	36,726
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	36,726
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,177
Real Estate And Accumulated Depreciation Date Of Construction	2007
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NJ East Hanover I and II [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 44,412
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,232
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	18,241
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10,376
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,671
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	28,178
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	30,849
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 13,166
Real Estate And Accumulated Depreciation Date Of Construction	1962
Real Estate And Accumulated Depreciation Date Acquired	1962/1998
Retail NJ Garfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	45
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,068
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	20,798
Real Estate And Accumulated Depreciation Carrying Amount Of Land	45
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	28,866
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	28,911
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,513
Real Estate And Accumulated Depreciation Date Of Construction	2009
Real Estate And Accumulated Depreciation Date Acquired	1998
Retail NJ Lodi (Washington Street) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 9,422
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,606
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,125
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	275
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,606
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,400
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	21,006
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,351
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail NJ Englewood [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 12,077
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,300
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	17,245
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	17
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,300
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	17,262
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	19,562
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,978
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NJ Bricktown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 33,153
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,391
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	11,179
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	6,154
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,391
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	17,333
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	18,724
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 10,383
Real Estate And Accumulated Depreciation Date Of Construction	1968
Real Estate And Accumulated Depreciation Date Acquired	1968
Retail NJ Totowa [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 25,703
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,102
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	11,994
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,617
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,099
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	16,614
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	17,713
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 11,445
Real Estate And Accumulated Depreciation Date Of Construction	1957/1999
Real Estate And Accumulated Depreciation Date Acquired	1957
Retail NJ Hazlet [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,400
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,413
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,413
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,813
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,078
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NJ Carlstadt [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 7,304
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	16,457
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	12
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	16,469
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,469
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,720
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NJ North Plainfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	500
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,983
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,380
Real Estate And Accumulated Depreciation Carrying Amount Of Land	500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	15,363
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,863
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 10,714
Real Estate And Accumulated Depreciation Date Of Construction	1955
Real Estate And Accumulated Depreciation Date Acquired	1989
Retail NJ East Brunswick II (339-341 Route 18 S.) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 12,226
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,098
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,949
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,826
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,098
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,775
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,873
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,138
Real Estate And Accumulated Depreciation Date Of Construction	1972
Real Estate And Accumulated Depreciation Date Acquired	1972
Retail NJ Manalapan [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 21,836
Real Estate And Accumulated Depreciation Initial Cost Of Land	725
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,189
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	7,791
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,046
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	14,659
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,705
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 10,027
Real Estate And Accumulated Depreciation Date Of Construction	1971
Real Estate And Accumulated Depreciation Date Acquired	1971
Retail NJ Marlton [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 17,913
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,611
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,464
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10,398
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,611
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,862
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,473
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 6,600
Real Estate And Accumulated Depreciation Date Of Construction	1973
Real Estate And Accumulated Depreciation Date Acquired	1973
Retail NJ Union (Route 22 and Morris Ave) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 33,551
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,025
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,470
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,813
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,025
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,283
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,308
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,492
Real Estate And Accumulated Depreciation Date Of Construction	1962
Real Estate And Accumulated Depreciation Date Acquired	1962
Retail NJ Hackensack [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 42,082
Real Estate And Accumulated Depreciation Initial Cost Of Land	692
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,219
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,250
Real Estate And Accumulated Depreciation Carrying Amount Of Land	692
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	11,469
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,161
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,713
Real Estate And Accumulated Depreciation Date Of Construction	1963
Real Estate And Accumulated Depreciation Date Acquired	1963
Retail NJ Wayne Towne Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,137
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,782
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	28,919
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	28,919
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 785
Real Estate And Accumulated Depreciation Date Of Construction	0
Real Estate And Accumulated Depreciation Date Acquired	2010
Retail NJ Watchung [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 15,638
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,178
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,463
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,545
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,441
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,745
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,186
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,396
Real Estate And Accumulated Depreciation Date Of Construction	1994
Real Estate And Accumulated Depreciation Date Acquired	1959
Retail NJ South Plainfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 5,317
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,044
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	389
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,433
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	10,433
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,175
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NJ Eatontown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,653
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,999
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	357
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,653
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,356
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	10,009
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 897
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail NJ Cherry Hill [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 14,387
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,864
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,694
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,828
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,864
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,522
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	10,386
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,864
Real Estate And Accumulated Depreciation Date Of Construction	1964
Real Estate And Accumulated Depreciation Date Acquired	1964
Retail NJ Dover [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 13,648
Real Estate And Accumulated Depreciation Initial Cost Of Land	559
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,363
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,955
Real Estate And Accumulated Depreciation Carrying Amount Of Land	559
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,318
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,877
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,782
Real Estate And Accumulated Depreciation Date Of Construction	1964
Real Estate And Accumulated Depreciation Date Acquired	1964
Retail NJ Lodi (Route 17 N.) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 11,771
Real Estate And Accumulated Depreciation Initial Cost Of Land	238
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,446
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	238
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,446
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,684
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,891
Real Estate And Accumulated Depreciation Date Of Construction	1999
Real Estate And Accumulated Depreciation Date Acquired	1975
Retail NJ East Brunswick I (325-333 Route 18 S.) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 25,817
Real Estate And Accumulated Depreciation Initial Cost Of Land	319
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,220
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,764
Real Estate And Accumulated Depreciation Carrying Amount Of Land	319
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,984
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,303
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,556
Real Estate And Accumulated Depreciation Date Of Construction	1957
Real Estate And Accumulated Depreciation Date Acquired	1957
Retail NJ Jersey City [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 21,040
Real Estate And Accumulated Depreciation Initial Cost Of Land	652
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,495
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	325
Real Estate And Accumulated Depreciation Carrying Amount Of Land	652
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,820
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,472
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,265
Real Estate And Accumulated Depreciation Date Of Construction	1965
Real Estate And Accumulated Depreciation Date Acquired	1965
Retail NJ Morris Plains [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 22,178
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,104
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,411
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	882
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,104
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,293
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,397
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 6,565
Real Estate And Accumulated Depreciation Date Of Construction	1961
Real Estate And Accumulated Depreciation Date Acquired	1985
Retail NJ Middeltown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 18,026
Real Estate And Accumulated Depreciation Initial Cost Of Land	283
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,248
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,607
Real Estate And Accumulated Depreciation Carrying Amount Of Land	283
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,855
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,138
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,001
Real Estate And Accumulated Depreciation Date Of Construction	1963
Real Estate And Accumulated Depreciation Date Acquired	1963
Retail NJ Woodbridge [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 21,438
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,509
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,675
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,780
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,539
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,425
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,964
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,396
Real Estate And Accumulated Depreciation Date Of Construction	1959
Real Estate And Accumulated Depreciation Date Acquired	1959
Retail NJ Delran [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	756
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,468
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	734
Real Estate And Accumulated Depreciation Carrying Amount Of Land	756
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,202
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,958
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,026
Real Estate And Accumulated Depreciation Date Of Construction	1972
Real Estate And Accumulated Depreciation Date Acquired	1972
Retail NJ Lawnside [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 11,089
Real Estate And Accumulated Depreciation Initial Cost Of Land	851
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,164
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,269
Real Estate And Accumulated Depreciation Carrying Amount Of Land	851
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,433
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,284
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,987
Real Estate And Accumulated Depreciation Date Of Construction	1969
Real Estate And Accumulated Depreciation Date Acquired	1969
Retail NJ Kearny [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	309
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,376
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,212
Real Estate And Accumulated Depreciation Carrying Amount Of Land	309
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,588
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,897
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,260
Real Estate And Accumulated Depreciation Date Of Construction	1938
Real Estate And Accumulated Depreciation Date Acquired	1959
Retail NJ Bordentown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	498
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,176
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,141
Real Estate And Accumulated Depreciation Carrying Amount Of Land	717
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,098
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,815
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,018
Real Estate And Accumulated Depreciation Date Of Construction	1958
Real Estate And Accumulated Depreciation Date Acquired	1958
Retail NJ Turnersville [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	900
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,342
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	853
Real Estate And Accumulated Depreciation Carrying Amount Of Land	900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,195
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,095
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,127
Real Estate And Accumulated Depreciation Date Of Construction	1974
Real Estate And Accumulated Depreciation Date Acquired	1974
Retail NJ North Bergen (Kennedy Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 5,289
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,308
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	636
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	34
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,308
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	670
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,978
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 403
Real Estate And Accumulated Depreciation Date Of Construction	1993
Real Estate And Accumulated Depreciation Date Acquired	1959
Retail NJ Montclair [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 2,730
Real Estate And Accumulated Depreciation Initial Cost Of Land	66
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	419
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	381
Real Estate And Accumulated Depreciation Carrying Amount Of Land	66
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	800
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	866
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 664
Real Estate And Accumulated Depreciation Date Of Construction	1972
Real Estate And Accumulated Depreciation Date Acquired	1972
Retail NJ Total New Jersey [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 850,310
Real Estate And Accumulated Depreciation Initial Cost Of Land	119,851
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	432,312
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	520,245
Real Estate And Accumulated Depreciation Carrying Amount Of Land	145,184
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	927,224
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,072,408
Real Estate And Accumulated Depreciation Accumulated Depreciation	211,691
Retail NY Valley Stream (Green Acres Mall) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	325,045
Real Estate And Accumulated Depreciation Initial Cost Of Land	147,172
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	134,980
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	59,161
Real Estate And Accumulated Depreciation Carrying Amount Of Land	146,968
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	194,345
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	341,313
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 51,397
Real Estate And Accumulated Depreciation Date Of Construction	1956
Real Estate And Accumulated Depreciation Date Acquired	1997
Retail NY Bronx (Bruckner Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	66,100
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	259,503
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	336
Real Estate And Accumulated Depreciation Carrying Amount Of Land	66,100
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	259,839
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	325,939
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 32,467
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY Hicksville (Broadway Mall) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 87,750
Real Estate And Accumulated Depreciation Initial Cost Of Land	126,324
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	48,904
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	7,216
Real Estate And Accumulated Depreciation Carrying Amount Of Land	126,324
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	56,120
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	182,444
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,327
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail NY Poughkeepsie [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	12,733
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	12,026
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	37,119
Real Estate And Accumulated Depreciation Carrying Amount Of Land	12,780
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	49,098
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	61,878
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,852
Real Estate And Accumulated Depreciation Date Of Construction	2009
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail NY Huntington [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 17,287
Real Estate And Accumulated Depreciation Initial Cost Of Land	21,200
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	33,667
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	166
Real Estate And Accumulated Depreciation Carrying Amount Of Land	21,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	33,833
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	55,033
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,524
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY Mount Kisco [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 29,026
Real Estate And Accumulated Depreciation Initial Cost Of Land	22,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,700
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	386
Real Estate And Accumulated Depreciation Carrying Amount Of Land	23,297
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,489
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	49,786
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,700
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY Bronx (Gun Hill Road) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,427
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	11,885
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	18,012
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,428
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	29,896
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	36,324
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,266
Real Estate And Accumulated Depreciation Date Of Construction	2009
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail NY Staten Island [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 17,237
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,446
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	21,262
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	300
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,446
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	21,562
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	33,008
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,341
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail NY Inwood [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	12,419
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	19,097
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	521
Real Estate And Accumulated Depreciation Carrying Amount Of Land	12,419
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,618
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	32,037
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,400
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail NY Queens (99-01 Queens Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,839
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,392
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,104
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,839
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	22,496
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	30,335
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,291
Real Estate And Accumulated Depreciation Date Acquired	2004
Retail NY West Babylon [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,720
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,786
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	70
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,720
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,856
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	20,576
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,658
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY Freeport (437 E. Sunrise Highway) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 22,178
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,231
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,747
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,421
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,231
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,168
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,399
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,882
Real Estate And Accumulated Depreciation Date Of Construction	1981
Real Estate And Accumulated Depreciation Date Acquired	1981
Retail NY Dewitt [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,116
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,116
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,116
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 925
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail NY Buffalo (Amherst) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,743
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,056
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,825
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,107
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,517
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,624
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,455
Real Estate And Accumulated Depreciation Date Of Construction	1968
Real Estate And Accumulated Depreciation Date Acquired	1968
Retail NY Oceanside [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,710
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,306
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,710
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,306
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,016
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 264
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY Albany (Menands) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	460
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,091
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,356
Real Estate And Accumulated Depreciation Carrying Amount Of Land	460
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,447
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,907
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,395
Real Estate And Accumulated Depreciation Date Of Construction	1965
Real Estate And Accumulated Depreciation Date Acquired	1965
Retail NY Rochester (Henrietta) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,647
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,205
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,852
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,852
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,512
Real Estate And Accumulated Depreciation Date Of Construction	1971
Real Estate And Accumulated Depreciation Date Acquired	1971
Retail NY Rochester [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 4,549
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,172
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,172
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,172
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Of Construction	1966
Real Estate And Accumulated Depreciation Date Acquired	1966
Retail NY Freeport (240 Sunrise Highway) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	260
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	260
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	260
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 84
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail NY Commack [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	43
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	236
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	279
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	279
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail NY New Hyde Park [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4
Real Estate And Accumulated Depreciation Date Of Construction	1970
Real Estate And Accumulated Depreciation Date Acquired	1976
Retail NY NY 1540 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	105,914
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	214,208
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	18,061
Real Estate And Accumulated Depreciation Carrying Amount Of Land	105,914
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	232,269
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	338,183
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,679
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail NY NY Manhattan Mall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 72,639
Real Estate And Accumulated Depreciation Initial Cost Of Land	88,595
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	113,473
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	73,376
Real Estate And Accumulated Depreciation Carrying Amount Of Land	88,595
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	186,849
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	275,444
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 26,120
Real Estate And Accumulated Depreciation Date Of Construction	2009
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY NY 828-850 Madison Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 80,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	107,937
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	28,261
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10
Real Estate And Accumulated Depreciation Carrying Amount Of Land	107,937
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	28,271
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	136,208
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,711
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail NY NY 4 Union Square South [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 75,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	24,079
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	55,220
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	620
Real Estate And Accumulated Depreciation Carrying Amount Of Land	24,079
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	55,840
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	79,919
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 10,732
Real Estate And Accumulated Depreciation Date Of Construction	1965/2004
Real Estate And Accumulated Depreciation Date Acquired	1993
Retail NY NY 478-482 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	20,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,375
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27,574
Real Estate And Accumulated Depreciation Carrying Amount Of Land	20,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	40,949
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	60,949
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,370
Real Estate And Accumulated Depreciation Date Of Construction	2009
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY NY 510 5th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 31,732
Real Estate And Accumulated Depreciation Initial Cost Of Land	34,602
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	18,728
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10,516
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,602
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	29,244
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	63,846
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 687
Real Estate And Accumulated Depreciation Date Acquired	2010
Retail NY NY 40 East 66th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,616
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	34,635
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	121
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,616
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	34,756
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	48,372
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,177
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail NY NY 155 Spring Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	30,544
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,153
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	32,697
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	46,397
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,881
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY NY 334 Canal Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,693
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,507
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,693
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,507
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,200
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Acquired	2011
Retail NY NY 435 7th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 51,353
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,893
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	19,091
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	37
Real Estate And Accumulated Depreciation Carrying Amount Of Land	19,893
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,128
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	39,021
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,511
Real Estate And Accumulated Depreciation Date Of Construction	2002
Real Estate And Accumulated Depreciation Date Acquired	1997
Retail NY NY 692 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,053
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	22,908
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,586
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,053
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	25,494
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	31,547
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,895
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail NY NY 715 Lexington Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,903
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,903
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	26,903
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,484
Real Estate And Accumulated Depreciation Date Of Construction	1923
Real Estate And Accumulated Depreciation Date Acquired	2001
Retail NY NY 677-679 Madison Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,070
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,640
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	361
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,001
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	23,071
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,378
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail NY NY 431 7th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	16,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,751
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	16,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,751
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	19,451
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 327
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY NY 484-486 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,688
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,079
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,767
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	20,767
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 853
Real Estate And Accumulated Depreciation Date Of Construction	2009
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY NY 1135 Third Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,844
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,844
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,844
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,844
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,688
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,745
Real Estate And Accumulated Depreciation Date Acquired	1997
Retail NY NY 148 Spring Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,200
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,112
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	112
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,224
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,424
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 737
Real Estate And Accumulated Depreciation Date Acquired	2008
Retail NY NY 150 Spring Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,200
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,822
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	137
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,959
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,159
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 547
Real Estate And Accumulated Depreciation Date Acquired	2008
Retail NY NY 488 8th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,650
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,767
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(4,674)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,859
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	884
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,743
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 82
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail NY NY 484 8th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,856
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	762
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,856
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	762
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,618
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 284
Real Estate And Accumulated Depreciation Date Acquired	1997
Retail NY NY 825 7th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,483
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	697
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	33
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,483
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	730
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,213
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 261
Real Estate And Accumulated Depreciation Date Acquired	1997
Retail NY Total New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 813,796
Real Estate And Accumulated Depreciation Initial Cost Of Land	959,481
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,253,148
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	267,796
Real Estate And Accumulated Depreciation Carrying Amount Of Land	955,495
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,524,930
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,480,425
Real Estate And Accumulated Depreciation Accumulated Depreciation	228,209
Retail PA Wilkes Barre [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	20,475
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,053
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,646
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	371
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,053
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	27,017
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	33,070
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,738
Real Estate And Accumulated Depreciation Date Acquired	2007
Retail PA Philadelphia [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	933
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	23,650
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	6,244
Real Estate And Accumulated Depreciation Carrying Amount Of Land	933
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	29,894
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	30,827
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 9,130
Real Estate And Accumulated Depreciation Date Of Construction	1977
Real Estate And Accumulated Depreciation Date Acquired	1994
Retail PA Allentown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 31,106
Real Estate And Accumulated Depreciation Initial Cost Of Land	187
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	15,580
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	330
Real Estate And Accumulated Depreciation Carrying Amount Of Land	187
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	15,910
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,097
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 11,995
Real Estate And Accumulated Depreciation Date Of Construction	1957
Real Estate And Accumulated Depreciation Date Acquired	1957
Retail PA Bensalem [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 15,439
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,727
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,698
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,858
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,727
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,556
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,283
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,049
Real Estate And Accumulated Depreciation Date Of Construction	1972/1999
Real Estate And Accumulated Depreciation Date Acquired	1972
Retail PA Bethlehem [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 5,800
Real Estate And Accumulated Depreciation Initial Cost Of Land	827
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,200
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	347
Real Estate And Accumulated Depreciation Carrying Amount Of Land	839
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,535
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	6,374
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,483
Real Estate And Accumulated Depreciation Date Of Construction	1966
Real Estate And Accumulated Depreciation Date Acquired	1966
Retail PA Wyomissing [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,646
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,393
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,039
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,039
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,492
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail PA York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 5,402
Real Estate And Accumulated Depreciation Initial Cost Of Land	409
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,568
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,811
Real Estate And Accumulated Depreciation Carrying Amount Of Land	409
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,379
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,788
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,713
Real Estate And Accumulated Depreciation Date Of Construction	1970
Real Estate And Accumulated Depreciation Date Acquired	1970
Retail PA Broomall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 11,089
Real Estate And Accumulated Depreciation Initial Cost Of Land	850
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,171
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	786
Real Estate And Accumulated Depreciation Carrying Amount Of Land	850
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,957
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,807
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,829
Real Estate And Accumulated Depreciation Date Of Construction	1966
Real Estate And Accumulated Depreciation Date Acquired	1966
Retail PA Lancaster [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 5,601
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,140
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	63
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	543
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,140
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	606
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,746
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 412
Real Estate And Accumulated Depreciation Date Of Construction	1966
Real Estate And Accumulated Depreciation Date Acquired	1966
Retail PA Upper Mooreland [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	683
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,868
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	900
Real Estate And Accumulated Depreciation Carrying Amount Of Land	683
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,768
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,451
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,661
Real Estate And Accumulated Depreciation Date Of Construction	1974
Real Estate And Accumulated Depreciation Date Acquired	1974
Retail PA Glenolden [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 7,108
Real Estate And Accumulated Depreciation Initial Cost Of Land	850
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,820
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	826
Real Estate And Accumulated Depreciation Carrying Amount Of Land	850
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,646
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,496
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,869
Real Estate And Accumulated Depreciation Date Of Construction	1975
Real Estate And Accumulated Depreciation Date Acquired	1975
Retail PA Levittown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	183
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,008
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	364
Real Estate And Accumulated Depreciation Carrying Amount Of Land	183
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,372
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,555
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,370
Real Estate And Accumulated Depreciation Date Of Construction	1964
Real Estate And Accumulated Depreciation Date Acquired	1964
Retail PA Springfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	123
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	123
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	123
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail PA Total Pennsylvania [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 102,020
Real Estate And Accumulated Depreciation Initial Cost Of Land	16,842
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	89,918
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	16,896
Real Estate And Accumulated Depreciation Carrying Amount Of Land	16,854
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	106,802
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	123,656
Real Estate And Accumulated Depreciation Accumulated Depreciation	47,741
Retail SC Charleston [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,634
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,634
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,634
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 477
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail TN Antioch [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,521
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,386
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,521
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,386
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,907
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 313
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail TX Texarkana [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	458
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	33
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	491
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	491
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 66
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail Springfield Mall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	49,516
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	265,964
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(42,815)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	49,516
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	223,149
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	272,665
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 33,751
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail VA Norfolk [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,927
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	15
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,942
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,942
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,284
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail VA Total Virginia [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	49,516
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	269,891
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(42,800)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	49,516
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	227,091
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	276,607
Real Estate And Accumulated Depreciation Accumulated Depreciation	36,035
Retail WA Bellingham [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,831
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,136
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(1,670)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	922
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,375
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,297
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 126
Real Estate And Accumulated Depreciation Date Acquired	2005
Retail DC 3040 M Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,830
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	27,490
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	45
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,830
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	27,535
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	35,365
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,118
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail WI Fond Du Lac [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	174
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	102
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	276
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	276
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 64
Real Estate And Accumulated Depreciation Date Acquired	2006
Retail Las Catalinas Mall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 55,912
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,280
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	64,370
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	8,091
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,280
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	72,461
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	87,741
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 24,511
Real Estate And Accumulated Depreciation Date Of Construction	1996
Real Estate And Accumulated Depreciation Date Acquired	2002
Retail Montehiedra Town Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 120,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	9,182
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	66,751
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,023
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,267
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	71,689
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	80,956
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 26,114
Real Estate And Accumulated Depreciation Date Of Construction	1996
Real Estate And Accumulated Depreciation Date Acquired	1997
Retail PR Total Puerto Rico [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 175,912
Real Estate And Accumulated Depreciation Initial Cost Of Land	24,462
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	131,121
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	13,114
Real Estate And Accumulated Depreciation Carrying Amount Of Land	24,547
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	144,150
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	168,697
Real Estate And Accumulated Depreciation Accumulated Depreciation	50,625
Retail Other [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,364
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,364
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,364
Real Estate And Accumulated Depreciation Accumulated Depreciation	101
Retail Total Retail Properties [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	2,231,312
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,384,693
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,607,201
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	833,389
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,404,223
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,421,060
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,825,283
Real Estate And Accumulated Depreciation Accumulated Depreciation	641,948
Merchandise Mart Merchandise Mart [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	550,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	64,528
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	319,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	166,115
Real Estate And Accumulated Depreciation Carrying Amount Of Land	64,535
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	485,254
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	549,789
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 158,615
Real Estate And Accumulated Depreciation Date Of Construction	1930
Real Estate And Accumulated Depreciation Date Acquired	1998
Merchandise Mart IL 527 W. Kinzie, Chicago [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,166
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,166
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,166
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Merchandise Mart IL Total [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	550,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	69,694
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	319,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	166,115
Real Estate And Accumulated Depreciation Carrying Amount Of Land	69,701
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	485,254
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	554,955
Real Estate And Accumulated Depreciation Accumulated Depreciation	158,615
Merchandise Mart Washington Design Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	12,274
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	40,662
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	12,888
Real Estate And Accumulated Depreciation Carrying Amount Of Land	12,274
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	53,550
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	65,824
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 17,579
Real Estate And Accumulated Depreciation Date Of Construction	1919
Real Estate And Accumulated Depreciation Date Acquired	1998
Merchandise Mart NY 7 West 34th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	34,614
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	94,167
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	35,886
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,614
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	130,053
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	164,667
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 34,132
Real Estate And Accumulated Depreciation Date Of Construction	1901
Real Estate And Accumulated Depreciation Date Acquired	2000
Merchandise Mart NY MMPI Piers [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,897
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,897
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,897
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 243
Real Estate And Accumulated Depreciation Date Acquired	2008
Merchandise Mart NY Total New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	34,614
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	94,167
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	45,783
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,614
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	139,950
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	174,564
Real Estate And Accumulated Depreciation Accumulated Depreciation	34,375
Merchandise Mart Boston Design Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	67,350
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	93,915
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(15,552)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	78,363
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	78,363
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,411
Real Estate And Accumulated Depreciation Date Of Construction	1918
Real Estate And Accumulated Depreciation Date Acquired	2005
Merchandise Mart CA Gift and Furniture Mart, Los Angeles [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,141
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	43,422
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	17,217
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,141
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	60,639
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	70,780
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 17,135
Real Estate And Accumulated Depreciation Date Of Construction	1958
Real Estate And Accumulated Depreciation Date Acquired	2000
Merchandise Mart Total Merchandise Mart [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 617,350
Real Estate And Accumulated Depreciation Initial Cost Of Land	126,723
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	591,312
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	226,451
Real Estate And Accumulated Depreciation Carrying Amount Of Land	126,730
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	817,756
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	944,486
Real Estate And Accumulated Depreciation Accumulated Depreciation	244,115
Warehouse/Industrial NJ East Hanover [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	576
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,752
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	7,879
Real Estate And Accumulated Depreciation Carrying Amount Of Land	691
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	15,516
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,207
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 13,755
Real Estate And Accumulated Depreciation Date Of Construction	1972
Real Estate And Accumulated Depreciation Date Acquired	1972
Warehouse/Industrial NJ Edison [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,903
Real Estate And Accumulated Depreciation Carrying Amount Of Land	704
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,199
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,903
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,179
Real Estate And Accumulated Depreciation Date Of Construction	1962
Real Estate And Accumulated Depreciation Date Acquired	1962
Warehouse/Industrial Total Warehouse/Industrial [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	576
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,752
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	12,782
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,395
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,715
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	21,110
Real Estate And Accumulated Depreciation Accumulated Depreciation	17,934
Other Properties Hotel Pennsylvania [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	29,904
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	121,712
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	74,238
Real Estate And Accumulated Depreciation Carrying Amount Of Land	29,904
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	195,950
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	225,854
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 68,427
Real Estate And Accumulated Depreciation Date Of Construction	1919
Real Estate And Accumulated Depreciation Date Acquired	1997
Other Properties 220 Central Park South [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 123,750
Real Estate And Accumulated Depreciation Initial Cost Of Land	115,720
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	16,420
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	112,447
Real Estate And Accumulated Depreciation Carrying Amount Of Land	115,720
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	128,867
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	244,587
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 20,119
Real Estate And Accumulated Depreciation Date Acquired	2005
Other Properties Wasserman [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	28,052
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	34,927
Real Estate And Accumulated Depreciation Carrying Amount Of Land	40,237
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	22,742
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	62,979
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 11,818
Real Estate And Accumulated Depreciation Date Acquired	2005
Other Properties 40 East 66th Residential [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	29,199
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	85,798
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(77,583)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	14,540
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	22,874
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	37,414
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,184
Real Estate And Accumulated Depreciation Date Acquired	2005
Other Properties 677-679 Madison [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,462
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,058
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,294
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,212
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,602
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,814
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 205
Real Estate And Accumulated Depreciation Date Acquired	2006
Other Properties Atlantic City NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 60,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	83,089
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(3)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	83,089
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	83,093
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Date Acquired	2010
Other Other [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	70
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	70
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	70
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Other Properties Total Other Properties [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	183,750
Real Estate And Accumulated Depreciation Initial Cost Of Land	287,426
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	224,995
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	145,390
Real Estate And Accumulated Depreciation Carrying Amount Of Land	285,702
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	372,109
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	657,811
Real Estate And Accumulated Depreciation Accumulated Depreciation	103,753
Leasehold Improvements Equipment and Other [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	128,651
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	128,651
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	128,651
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 98,453

Organization and Business (Details) sqft in Millions	12 Months Ended
Organization and Business (Details) sqft in Millions	Dec. 31, 2011 sqft Properties Residential
Organization And Business Details [Abstract]
Common limited partnership interest in the Operating Partnership	93.50%
LNR Property [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage	26.20%
JC Penney [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage	11.00%
Real Estate Investment Fund [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage	25.00%
Toys R Us [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage	32.70%
Washington DC Office [Member] \| Washington Dc Northern Virginia [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	77
Square Footage Of Real Estate Property	20.5
Alexanders Inc [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage	32.40%
Office Properties [Member] \| San Francisco [Member] \| California Street 555 [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	3
Square Footage Of Real Estate Property	1.8
Contolling Interest In Real Estate Properties Percent	70.00%
Office Properties [Member] \| New York Office [Member] \| Midtown Manhattan [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	30
Square Footage Of Real Estate Property	20.8
Office Properties [Member] \| Washington DC Office [Member] \| Washington Dc Northern Virginia [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	63
Square Footage Of Real Estate Property	17.5
Retail Properties [Member] \| Northeast States California And Puerto Rico [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	134
Square Footage Of Real Estate Property	24.2
Retail Properties [Member] \| Manhattan [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	46
Square Footage Of Real Estate Property	2.2
Retail Properties [Member] \| New York Office [Member] \| Manhattan [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	25
Square Footage Of Real Estate Property	1.2
Retail Properties [Member] \| Retail [Member] \| Manhattan [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	21
Square Footage Of Real Estate Property	1.0
Merchandise Mart Properties [Member]
Real Estate Properties [Line Items]
Square Footage Of Real Estate Property	5.7
Merchandise Mart Properties [Member] \| Chicago [Member] \| Merchandise Mart Merchandise Mart [Member]
Real Estate Properties [Line Items]
Square Footage Of Real Estate Property	3.5
Other Real Estate And Related Investments [Member] \| Manhattan [Member] \| Hotel Pennsylvania [Member]
Real Estate Properties [Line Items]
Number of Units in Real Estate Property \| Residential	1,700
Other Real Estate And Related Investments [Member] \| Alexanders Inc [Member] \| New York City Metropolitan Area [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	7
Other Real Estate And Related Investments [Member] \| Alexanders Inc [Member] \| New York City Metropolitan Area [Member] \| Lexington Avenue 731 [Member]
Real Estate Properties [Line Items]
Square Footage Of Real Estate Property	1.3
Residential Properties [Member] \| Washington DC Office [Member] \| Washington Dc Northern Virginia [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties \| Properties	7
Number of Units in Real Estate Property \| Residential	2,424

Marketable Securities and Derivative Instruments: Marketable Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]
Other than temporary impairment loss			$ 3,361,000
Available For Sale Securities Gross Realized Gains Losses Sale Proceeds	$ 69,559,000	$ 281,486,000	64,355,000
Available-for-sale Securities, Gross Realized Gain (Loss)	5,020,000	22,604,000	$ 3,834,000
Schedule of Available-for-sale Securities [Line Items]
Marketable securities	741,321,000	766,116,000
Available-for-sale Securities, Amortized Cost Basis	659,595,000	721,027,000
Available-for-sale Securities, Gross Unrealized Gain (Loss)	81,726,000	45,089,000
JC Penney [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	653,228,000	601,303,000
Available-for-sale Equity Securities, Amortized Cost Basis	591,069,000	591,069,000
Available-for-sale Securities, Gross Unrealized Gain (Loss)	62,159,000	10,234,000
Other Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	29,544,000	46,545,000
Available-for-sale Equity Securities, Amortized Cost Basis	13,561,000	25,778,000
Available-for-sale Securities, Gross Unrealized Gain (Loss)	15,983,000	20,767,000
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Securities	58,549,000	118,268,000
Available-for-sale Debt Securities, Amortized Cost Basis	54,965,000	104,180,000
Available-for-sale Securities, Gross Unrealized Gain (Loss)	$ 3,584,000	$ 14,088,000
Available-for-sale Securities, Debt Maturity, Date Range, Low	04/13	08/11
Available-for-sale Securities, Debt Maturity, Date Range, High	10/18	10/18

Marketable Securities and Derivative Instruments: Derivative Instrument (Details) - JC Penney [Member] - USD ($)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Derivative [Line Items]
Investment Owned Balance Shares	23,400,000
Ownership Percentage	11.00%
Investment Owned, at Cost		$ 591,069,000
Closing share price	$ 35.15	$ 32.31
Maximum Ownership Percentage Per Agreement	15.40%
Voting Ownership Interest Percentage Per Agreement	9.90%
Shares Owned [Member]
Derivative [Line Items]
Investment Owned Balance Shares	18,584,010
Acquisiton Price Per Share	$ 25.75
Investment Owned, at Cost	$ 478,532,000
Unrealized Gain Loss On Securities	51,925,000
Investment Owned At Fair Value	653,228,000
Equity Contract [Member] \| September 2010 [Member]
Derivative [Line Items]
Investment Owned Balance Shares		15,500,000
Acquisiton Price Per Share		$ 31.81
Derivative Inception Dates		Sep. 28, 2010
Derivative Gain On Derivative		$ 112,537,000
Derivative Maturity Dates		Nov. 09, 2010
Forward Contracts [Member]
Derivative [Line Items]
Unrealized Gain Loss On Securities	$ 12,984,000	$ 17,616,000
Forward Contracts [Member] \| October 2010 [Member]
Derivative [Line Items]
Derivative Inception Dates	Oct. 07, 2010
Derivative Number Of Instruments Held	4,815,990
Derivative Price Risk Option Strike Price	28.80
Derivative Maturity Dates	Oct. 09, 2012
Notional Amount Of Price Risk Derivatives	$ 138,682,000
Derivative Basis Spread On Variable Rate	0.80%

Mezzanine Loans Receivable (Details) - USD ($) $ in Thousands	2 Months Ended	12 Months Ended
	Mar. 02, 2011	Dec. 31, 2011	Dec. 31, 2010
Mezzanine Loan Receivable - Interest Rate		9.53%
Valuation allowance		$ 0	$ (73,216)
Notes receivable, net		$ 133,948	202,412
Mezzanine Loans Receiveable - Maturity Start Date		August 2014
Mezzanine Loans Receiveable - Maturity End Date		May 2016
Tharaldson Lodging Companies [Member]
Notes receivable, net	$ 60,416
Gain Loss on Sale of Notes Receivable	10,474
Proceeds from Sale of Notes Receivable	$ 70,890
Park Avenue [Member]
Notes receivable, net			$ 1,480
Face Amount of Mezzanine Loan Contributed to Joint Venture		$ 73,750
Income From Reversal Of Loan Loss Reserve		63,145
Interest Income On Notes Receivable Previously Unrecognized		9,125
Income From Reversal Of Loan Loss Reserve And Recognition Of Previously Unrecognized Interest Income		$ 72,270

Discontinued Operations (Details) $ in Thousands			12 Months Ended
Discontinued Operations (Details) $ in Thousands	Jan. 06, 2012 USD ($) sqft	Sep. 01, 2009 USD ($) sqft	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($) Properties	Jan. 12, 2011 USD ($)
Disposal Group Not Discontinued Operation Income Statement Disclosures Abstract
Total revenues			$ 45,745	$ 82,917	$ 96,853
Total expenses			29,943	77,511	78,148
Operating Income from Discontinued Operations			15,802	5,406	18,705
Disposal Group Including Discontinued Operation Litigation Loss Accruals Impairments			(5,799)	(15,056)	(14,060)
Income (loss) from discontinued operations			145,533	(7,144)	49,929
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations			251,202	519,285
Liabilities related to discontinued operations			14,153	267,652
Other real estate [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Gain (Loss) from Disposal of real estate			5,761	2,506	45,284
Disposal Group Not Discontinued Operation Income Statement Disclosures Abstract
Net gains on sale of real estate			5,761	2,506	$ 45,284
Washington DC1140 Connecticut Avenue [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Sale of real estate property, gross						$ 127,000
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations			0	36,271
Liabilities related to discontinued operations			0	18,948
Washington DC1227 Twenty Fifth Street [Member]
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations			0	43,630
Washington DC1140 Connecticut Avenue and 1227 Twenty Fifth Street [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Gain (Loss) from Disposal of real estate			45,862
Disposal Group Not Discontinued Operation Income Statement Disclosures Abstract
Net gains on sale of real estate			45,862
Washington DC1999K Street [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Cash Sale of Real Estate		$ 207,800
Gain (Loss) from Disposal of real estate		$ 41,211
Square Footage Of Real Estate Property \| sqft		250,000
Disposal Group Not Discontinued Operation Income Statement Disclosures Abstract
Net gains on sale of real estate		$ 41,211
High Point Complex [Member]
Disposal Group Not Discontinued Operation Income Statement Disclosures Abstract
Net gain on extinguishment of debt			83,907
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations			0	154,563
Liabilities related to discontinued operations			0	236,974
Petangon Row [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Cash Sale of Real Estate				14,992
Retail Properties [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Number of additional retail properties sold \| Properties					15
Cash Sale of Real Estate					$ 55,000
Gain (Loss) from Disposal of real estate					4,073
Disposal Group Not Discontinued Operation Income Statement Disclosures Abstract
Net gains on sale of real estate					$ 4,073
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations			77,422	121,837
Liabilities related to discontinued operations			7,792	11,730
350 West Mart Center [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Cash Sale of Real Estate	$ 228,000
Gain (Loss) from Disposal of real estate	$ 54,200
Square Footage Of Real Estate Property \| sqft	1,200,000
Disposal Group Not Discontinued Operation Income Statement Disclosures Abstract
Net gains on sale of real estate	$ 54,200
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations			173,780	162,984
Liabilities related to discontinued operations			6,361	$ 0
Three retail properties [Member]
Disposal Group Including Discontinued Operation Additional Disclosures Abstract
Cash Sale of Real Estate			$ 40,990

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
ASSETS
Accounts receivable, allowance for doubtful accounts	$ 43,241	$ 62,979
Mezzanine loans receivable, allowance	0	73,216
Receivable arising from the straight-lining of rents, allowance	4,046	7,316
Deferred leasing and financing costs, accumulated amortization	245,087	219,965
Identified intangible assets (included in other assets): Accumulated amortization	$ 359,944	$ 335,113
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Preferred shares of beneficial interest: authorized shares	110,000,000	110,000,000
Preferred shares of beneficial interest: issued shares	42,186,709	32,340,009
Preferred shares of beneficial interest: outstanding shares	42,186,709	32,340,009
Common shares of beneficial interest: par value per share	$ 0.04	$ 0.04
Common shares of beneficial interest: authorized shares	250,000,000	250,000,000
Common shares of beneficial interest: issued shares	185,080,020	183,661,875
Common shares of beneficial interest: outstanding shares	185,080,020	183,661,875
Common Class A [Member]
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	12,160,771	12,804,202
Cumulative Redeemable Preferred Unit [Member]
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	9,000,001	10,400,001

Investments in Partially Owned Entities (Parentheticals) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Oct. 31, 2008	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Toys R Us [Member]
Gain Loss Related To Litigation Settlement				$ 10,200
Equity Method Investment Income Tax Expense		$ (1,132)	$ (45,418)	(13,185)
Lexington Realty Trust [Member]
Gain on Stock Issuance		9,760	13,710
Prior Period Non Cash Impairment Charges	$ 107,882
Impairment loss				19,121
LNR [Member]
Equity Method Investment Income Tax Expense		(12,380)
Tax Adjustments, Settlements, and Unusual Provisions		8,977
Net gains from asset sales		6,020
India real estate ventures [Member]
Impairment loss		$ 13,794
Other equity method investments [Member]
Prior Period Non Cash Impairment Charges			$ 11,481	17,820
Other equity method investments [Member] \| Verde Realty Operating Partnership [Member]
Impairment loss				14,515
Other equity method investments [Member] \| Downtown Crossing [Member]
Lease termination payment				$ 7,650

Debt (Parentheticals) (Details) $ in Thousands					12 Months Ended
Debt (Parentheticals) (Details) $ in Thousands	Jan. 09, 2012 USD ($)	Dec. 28, 2011 USD ($)	Nov. 30, 2011 USD ($)	Feb. 11, 2011 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Feb. 06, 2012	Sep. 01, 2011 USD ($)	May 31, 2011 USD ($)	Feb. 10, 2011 USD ($)	Jan. 18, 2011 USD ($)	Jan. 10, 2011 USD ($)	Jan. 06, 2011 USD ($)
Interest Rate, Effective					5.45%
Line of Credit Facility, Maximum Borrowing Capacity					$ 2,500,000
Repayments of borrowings					3,740,327	$ 1,564,143	$ 2,075,236
Proceeds from borrowings					$ 3,412,897	$ 2,481,883	$ 2,648,175
Unsecured Revolving Credit Facilities [Member]
Interest Rate, End of Period					1.48%
Unsecured Revolving Credit Facilities [Member] \| Unsecured Revolving Credit Facility $1.25 Billion Maturing 06/16 [Member]
Spread Over LIBOR					1.35%
Debt Instrument, Description of Variable Rate Basis					LIBOR
Line of Credit Facility, Maximum Borrowing Capacity					$ 1,250,000
Line of Credit Facility, Commitment Fee Percentage					0.30%
Unsecured Revolving Credit Facilities [Member] \| Unsecured Revolving Credit Facility $1.25 Billion Maturing 11/16 [Member]
Spread Over LIBOR					1.25%
Debt Instrument, Description of Variable Rate Basis					LIBOR
Interest Rate, End of Period					1.48%
Line of Credit Facility, Maximum Borrowing Capacity					$ 1,250,000
Line of Credit Facility, Commitment Fee Percentage					0.25%
Notes And Mortgages Payable Variable Rate [Member]
Interest Rate, End of Period					2.30%
Notes And Mortgages Payable Variable Rate [Member] \| New York Office Eleven Penn Plaza [Member]
Spread Over LIBOR		2.35%			2.35%
Debt Instrument, Description of Variable Rate Basis					LIBOR
Interest Rate, End of Period					2.60%
Notes And Loans Payable Refinanced Amount		$ 330,000
Debt Amortization Period		30
Notes And Mortgages Payable Variable Rate [Member] \| New York Office 866 UN Plaza [Member]
Spread Over LIBOR					1.25%
Debt Instrument, Description of Variable Rate Basis					LIBOR
Interest Rate, End of Period					1.69%
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC Office West End 25 [Member]
Notes And Loans Payable Financing Amount										$ 101,671
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC Office 220 20th Street [Member]
Notes And Loans Payable Financing Amount												$ 76,100
Notes And Mortgages Payable Variable Rate [Member] \| Washington DC Office River House Apartments [Member]
Spread Over LIBOR					1.53%
Debt Instrument, Description of Variable Rate Basis					Freddie Mac
Interest Rate, End of Period					1.53%
Notes And Mortgages Payable Variable Rate [Member] \| Retail Beverly Connection [Member]
Spread Over LIBOR					4.25%
Debt Instrument, Description of Variable Rate Basis					LIBOR
Interest Rate, End of Period					4.75%
LIBOR Floor					0.50%
Notes And Mortgages Payable Variable Rate [Member] \| Retail Cross Collateralized Mortgages On 40 Strip Shopping Centers [Member]
Spread Over LIBOR					1.36%
Debt Instrument, Description of Variable Rate Basis					LIBOR
Interest Rate, End of Period					2.36%
LIBOR Floor					1.00%
Notes And Mortgages Payable Variable Rate [Member] \| Retail 435 Seventh Avenue [Member]
Spread Over LIBOR					3.00%
Debt Instrument, Description of Variable Rate Basis					LIBOR
Interest Rate, End of Period					5.00%
LIBOR Floor					2.00%
Notes And Mortgages Payable Fixed Rate [Member]
Interest Rate, End of Period					5.53%
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office 350 Park Avenue New Loan [Member]
Interest Rate, End of Period	3.75%
Notes And Loans Payable Refinanced Amount	$ 300,000
Debt Amortization Period	30
Repayments of borrowings	$ 132,000
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office Two Penn Plaza [Member]
Spread Over LIBOR				2.00%
Debt Instrument, Description of Variable Rate Basis				LIBOR
Interest Rate, End of Period					5.13%
Notes And Loans Payable Refinanced Amount				$ 425,000
Retained Proceeds From Refinancing				$ 139,000
Debt Amortization Period				30
Notes And Mortgages Payable Fixed Rate [Member] \| New York Office Eleven Penn Plaza [Member]
Debt Instrument, Description of Variable Rate Basis		LIBOR
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office Skyline Place [Member]
Interest Rate, End of Period					5.74%
Vacancy Rate								26.00%
Notes And Mortgages Payable Fixed Rate [Member] \| Washington Dc Office 2121 Crystal Drive [Member]
Interest Rate, End of Period					5.51%
Notes And Loans Payable Financing Amount											$ 150,000
Debt Amortization Period											30
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office West End 25 [Member]
Interest Rate, End of Period					4.88%
Debt Amortization Period										30
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office 220 20th Street [Member]
Interest Rate, End of Period					4.61%
Debt Amortization Period												30
Notes And Mortgages Payable Fixed Rate [Member] \| Washington DC Office River House Apartments [Member]
Interest Rate, End of Period					5.43%
Notes And Mortgages Payable Fixed Rate [Member] \| Retail North Bergen Tonnelle Avenue [Member]
Interest Rate, End of Period					4.59%
Notes And Loans Payable Financing Amount													$ 75,000
Debt Amortization Period													25
Notes And Mortgages Payable Fixed Rate [Member] \| Retail Cross Collateralized Mortgages On 40 Strip Shopping Centers [Member]
Interest Rate, End of Period					4.21%
Notes And Mortgages Payable Fixed Rate [Member] \| Other 555 California Street [Member]
Interest Rate, End of Period					5.10%
Notes And Loans Payable Refinanced Amount									$ 600,000
Debt Amortization Period									30
Notes And Mortgages Payable Fixed Rate [Member] \| Other Borgata Land [Member]
Interest Rate, End of Period					5.14%
Notes And Loans Payable Financing Amount														$ 60,000
Debt Amortization Period														30
Senior Unsecured Notes [Member]
Interest Rate, End of Period					5.70%
Senior Unsecured Notes [Member] \| Senior Unsecured Notes Due 2022 [Member]
Interest Rate, Stated			5.00%
Interest Rate, Effective			5.057%
Interest Rate, End of Period					5.00%
Debt Instrument, Face Amount			$ 400,000
Proceeds from borrowings			$ 395,584
Selling Price As Percentage Of Face Value			99.546%

Redeemable Noncontrolling Interests (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	$ 934,677	$ 1,066,974
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	226,000	261,000
Redeemable Noncontrolling Interests Rollforward [Abstract]
Reedemable Noncontrolling Interest, Beginning Balance	1,327,974	1,251,628
Net Income	55,912	55,228
Distributions	(50,865)	(53,515)
Conversion of Class A redeemable units into common shares, at redemption value	(64,830)	(126,764)
Adjustment to carry Class A redeemable units at redemption value	(98,092)	191,826
Cumulative Redeemable Preferred Units Redemption Amount	(28,000)	(13,000)
Other, net	18,578	22,571
Reedemable Noncontrolling Interest, Ending Balance	1,160,677	1,327,974
Redeemable Noncontrolling Interests Additional Disclosure [Abstract]
Fair value of Series G convertible preferred units and Series D-13 cumulative redeemable preferred units	54,865	55,097
Cumulative Redeemable Preferred Units Redemption Amount	$ 28,000	$ 13,000
Common Class A [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Outstanding Partnership Units held by Third Parties	12,160,771	12,804,202
Preference Or Annual Distribution Rate	$ 2.76
Series D10 Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Dividend Percentage	7.00%
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	$ 80,000	$ 80,000
Outstanding Partnership Units held by Third Parties	3,200,000	3,200,000
Par or Stated Value Per Share	$ 25.00
Preference Or Annual Distribution Rate	$ 1.75
Series D11 Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Dividend Percentage	7.20%
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	$ 0	$ 35,000
Outstanding Partnership Units held by Third Parties	0	1,400,000
Par or Stated Value Per Share	$ 25.00
Preference Or Annual Distribution Rate	$ 1.80
Redeemable Noncontrolling Interests Rollforward [Abstract]
Cumulative Redeemable Preferred Units Redemption Amount	$ (28,000)
Redeemable Noncontrolling Interests Additional Disclosure [Abstract]
Redemption Price per share	$ 20.00
Cumulative Redeemable Preferred Units Redemption Amount	$ 28,000
Series D14 Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Dividend Percentage	6.75%
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	$ 100,000	$ 100,000
Outstanding Partnership Units held by Third Parties	4,000,000	4,000,000
Par or Stated Value Per Share	$ 25.00
Preference Or Annual Distribution Rate	$ 1.6875
Series D15 Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Dividend Percentage	6.875%
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	$ 45,000	$ 45,000
Outstanding Partnership Units held by Third Parties	1,800,000	1,800,000
Par or Stated Value Per Share	$ 25.00
Preference Or Annual Distribution Rate	$ 1.71875
Series D16 Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Dividend Percentage	5.00%
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	$ 1,000	$ 1,000
Outstanding Partnership Units held by Third Parties	1	1
Par or Stated Value Per Share	$ 1,000,000.00
Preference Or Annual Distribution Rate	$ 50,000.00
Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Outstanding Partnership Units held by Third Parties	9,000,001	10,400,001

Fee and Other Income (Details) - USD ($) $ in Thousands	12 Months Ended
Fee and Other Income (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Fee and Other Income [Abstract]
BMS cleaning fees	$ 61,754	$ 58,053	$ 53,824
Management and leasing fees	20,103	20,117	11,456
Lease termination fees	16,395	14,826	4,886
Other income	52,102	54,362	85,160
Total Fee and Other Income	$ 150,354	$ 147,358	$ 155,326

Fee and Other Income (Parentheticals) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2010 USD ($)
Fee and Other Income [Abstract]
Gain Loss On Contract Termination	$ 27,089

Cleveland Medical Mart Development Project (Details)	12 Months Ended
Cleveland Medical Mart Development Project (Details)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($) sqft	Dec. 31, 2009 USD ($)
Performance Not Achieved Termination Period		5 years
Development and Operating Period	17 years
Development And Project Management Revenues	$ 154,080,000	$ 0	$ 0
Development And Project Management Expenses	145,824,000	$ 0	$ 0
Cleveland Medical Mart & Convention Center [Member]
Square Footage Of Real Estate Property \| sqft		1,000,000
Construction Costs Budgeted	465,000,000
Annual Net Settled Payments Received	10,000,000
Annual Obligation to the County	36,000,000
Commitments to Fund Improvements		$ 11,500,000
Development And Project Management Revenues	154,080,000
Development And Project Management Expenses	$ 145,824,000

Multiemployer Plans (Details) - USD ($) $ in Thousands	12 Months Ended
Multiemployer Plans (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Multiemployer Plans, Pension [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	$ 10,168	$ 9,629	$ 9,260
Multiemployer Plans, Period Contributions, Significance of Contributions	false
Multiemployer Plans, Healthcare Benefit [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	$ 23,847	$ 21,664	$ 20,949

Commitments and Contingencies (Details) - USD ($)	12 Months Ended
Commitments and Contingencies (Details) - USD ($)	Dec. 31, 2011	Dec. 16, 2011	Nov. 07, 2011
Guarantees and master leases	$ 283,625,000
Outstanding letters of credit	$ 22,085,000
Development and Operating Period	17 years
NBCR Losses [Member]
Federal government deductible, percentage of balance of a covered loss	85.00%
Insurance limit per occurrence	$ 2
Earthquake California Properties [Member]
Vornado deductible, annual aggregate	180,000,000
Insurance limit per occurrence	$ 180,000,000
Vornado deductible, percentage of property value	5.00%
All Risk And Rental Value [Member]
Insurance limit per occurrence	$ 2.0
General Liability [Member]
Insurance limit per occurrence	300,000,000
PPIC [Member] \| NBCR Losses [Member]
Insurance deductible	$ 3,200,000
Insurance Deductible Percentage Of Balance Of Covered Loss	15.00%
Central Park South 220 [Member]
Commitment to fund additional capital to partially owned entities	$ 288,799,000
Stop & Shop [Member]
Stop & Shop complaint regarding annual rent collected pursuant to Master Agreement and Guaranty	5,000,000
Stop & Shop judgement in our favor to pay us the unpaid annual rent accrued		$ 56,597,000	$ 37,422,000
Accounts Receivable, Gross	41,983,000
Allowance for Doubtful Accounts Receivable	$ 23,521,000
Loss Contingency, Opinion of Counsel	41,983,000
Stop & Shop recovery action of annual rent commenced by Vornado	$ 2,500,000

Related Party Transactions (Details) - USD ($)		12 Months Ended
Related Party Transactions (Details) - USD ($)	Dec. 23, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Nov. 30, 1999
Related Party Transaction [Line Items]
Proceeds from the repayment of loan to officer		$ 13,123,000	$ 0	$ 0
Loan to officer		$ 13,123,000	0	0
Board Of Directors Chairman [Member]
Related Party Transaction [Line Items]
Proceeds from the repayment of loan to officer	$ 13,122,500
Loan to officer	$ 13,122,500
Related Party Transaction, Date	Dec. 23, 2017
Related Party Transaction, Rate	1.27%
Related Party Transaction Maximum Borrowing Capacity					$ 15,000,000
Alexanders Inc [Member]
Related Party Transactions With Affiliated Entity [Line Items]
Percentage of Affiliated Entity Owned By Company		32.40%
Percentage Of Affiliated Entity Owned By Related Parties		27.20%
Interstate Properties [Member]
Related Party Transactions With Affiliated Entity [Line Items]
Percentage of Company Owned by Related Party		6.30%
Fee And Other Income From Related Parties		$ 787,000	$ 815,000	$ 782,000
Related Party Transaction Annual Fee Percentage		4.00%
Related Party Transaction Description Of Transaction		We manage and lease the real estate assets of Interstate pursuant to a management agreement for which we receive an annual fee equal to 4% of annual base rent and percentage rent. The management agreement has a term of one year and is automatically renewable unless terminated by either of the parties on 60 days’ notice at the end of the term. We believe, based upon comparable fees charged by other real estate companies, that the management agreement terms are fair to us.