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Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2016 shares
Document and Entity Information [Abstract]
Entity Registrant Name	VORNADO REALTY TRUST
Entity Central Index Key	0000899689
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	188,994,234
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Trading Symbol	vno

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Real estate, at cost:
Land	$ 4,129,497	$ 4,164,799
Buildings and improvements	12,654,086	12,582,671
Development costs and construction in progress	1,369,953	1,226,637
Leasehold improvements and equipment	114,026	116,030
Total	18,267,562	18,090,137
Less accumulated depreciation and amortization	(3,430,832)	(3,418,267)
Real estate, net	14,836,730	14,671,870
Cash and cash equivalents	1,352,697	1,835,707
Restricted cash	111,941	107,799
Marketable securities	198,165	150,997
Tenant and other receivables, net of allowance for doubtful accounts of $11,171 and $11,908	94,057	98,062
Investments in partially owned entities	1,497,925	1,550,422
Real estate fund investments	519,386	574,761
Receivable arising from the straight-lining of rents, net of allowance of $2,414 and $2,751	1,027,319	931,245
Deferred leasing costs, net of accumulated amortization of $234,330 and $218,239	462,179	480,421
Identified intangible assets, net of accumulated amortization of $201,164 and $187,360	201,450	227,901
Assets related to discontinued operations	5,546	37,020
Other assets	551,974	477,088
Assets	20,859,369	21,143,293
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Mortgages payable	9,867,550	9,513,713
Senior unsecured notes, net	845,223	844,159
Unsecured revolving credit facilities	115,630	550,000
Unsecured term loan, net	371,835	183,138
Accounts payable and accrued expenses	461,234	443,955
Deferred revenue	301,017	346,119
Deferred compensation plan	118,359	117,475
Liabilities related to discontinued operations	3,284	12,470
Other liabilities	457,928	426,965
Total liabilities	12,542,060	12,437,994
Commitments and contingencies
Redeemable noncontrolling interests:
Class A units - 12,280,354 and 12,242,820 units outstanding	1,242,895	1,223,793
Series D cumulative redeemable preferred units - 177,101 units outstanding	5,428	5,428
Total redeemable noncontrolling interests	1,248,323	1,229,221
Vornado shareholders' equity:
Preferred shares of beneficial interest: no par value per share; authorized 110,000,000 shares; issued and outstanding 42,826,629 and 52,676,629 shares	1,038,111	1,276,954
Common shares of beneficial interest: $.04 par value per share; authorized 250,000,000 shares; issued and outstanding 188,994,234 and 188,576,853 shares	7,537	7,521
Additional capital	7,139,220	7,132,979
Earnings less than distributions	(1,951,411)	(1,766,780)
Accumulated other comprehensive income	82,374	46,921
Total Vornado shareholders' equity	6,315,831	6,697,595
Noncontrolling interests in consolidated subsidiaries	753,155	778,483
Total equity	7,068,986	7,476,078
Total liabilities, redeemable noncontrolling interests and equity	$ 20,859,369	$ 21,143,293

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Tenant and other receivables, allowance for doubtful accounts (in US dollars)	$ 11,171	$ 11,908
Receivable arising from the straight-lining of rents, allowance (in US dollars)	2,414	2,751
Deferred leasing costs, accumulated amortization (in US dollars)	234,330	218,239
Identified intangible assets, accumulated amortization (in US dollars)	$ 201,164	$ 187,360
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Preferred Stock, Par Value Per Share	$ 0	$ 0
Preferred shares of beneficial interest: authorized shares	110,000,000	110,000,000
Preferred shares of beneficial interest: issued shares	42,826,629	52,676,629
Preferred shares of beneficial interest: outstanding shares	42,826,629	52,676,629
Common shares of beneficial interest: par value per share (in dollars 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	188,994,234	188,576,853
Common shares of beneficial interest: outstanding shares	188,994,234	188,576,853
Common Class A [Member]
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	12,280,354	12,242,820
Series D Cumulative Redeemable Preferred Unit [Member]
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	177,101	177,101

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
REVENUES:
Property rentals	$ 523,998	$ 526,337	$ 1,570,668	$ 1,541,454
Tenant expense reimbursements	71,425	67,098	191,841	196,234
Fee and other income	37,774	34,161	105,433	112,998
Total revenues	633,197	627,596	1,867,942	1,850,686
EXPENSES:
Operating	260,826	256,561	762,313	753,744
Depreciation and amortization	138,968	141,920	423,238	402,999
General and administrative	40,442	36,157	134,710	133,838
Impairment loss and acquisition and transaction related costs	3,808	1,518	171,994	7,560
Total expenses	444,044	436,156	1,492,255	1,298,141
Operating income	189,153	191,440	375,687	552,545
Income (loss) from partially owned entities	4,127	(325)	529	(8,709)
Income from real estate fund investments	1,077	1,665	28,750	52,122
Interest and other investment income, net	6,508	3,160	20,262	19,618
Interest and debt expense	(98,365)	(95,344)	(304,430)	(279,110)
Net gain on disposition of wholly owned and partially owned assets	0	103,037	160,225	104,897
Income before income taxes	102,500	203,633	281,023	441,363
Income tax (expense) benefit	(4,865)	(2,856)	(9,805)	84,245
Income from continuing operations	97,635	200,777	271,218	525,608
Income from discontinued operations	2,969	34,463	6,160	50,278
Net income	100,604	235,240	277,378	575,886
Less net income attributable to noncontrolling interests in:
Consolidated subsidiaries	(3,658)	(3,302)	(26,361)	(38,370)
Operating Partnership	(4,366)	(12,704)	(11,410)	(28,189)
Net income attributable to Vornado	92,580	219,234	239,607	509,327
Preferred share dividends	(19,047)	(20,364)	(59,774)	(60,213)
Preferred share issuance costs (Series J redemption)	(7,408)	0	(7,408)	0
NET INCOME attributable to common shareholders	$ 66,125	$ 198,870	$ 172,425	$ 449,114
INCOME PER COMMON SHARE - BASIC:
Income from continuing operations, net (in dollars per share)	$ 0.34	$ 0.88	$ 0.88	$ 2.13
Income from discontinued operations, net (in dollars per share)	0.01	0.17	0.03	0.25
Net income per common share (in dollars per share)	$ 0.35	$ 1.05	$ 0.91	$ 2.38
Weighted average shares outstanding	188,901	188,504	188,778	188,291
INCOME PER COMMON SHARE - DILUTED:
Income from continuing operations, net (in dollars per share)	$ 0.33	$ 0.88	$ 0.88	$ 2.12
Income from discontinued operations, net (in dollars per share)	0.02	0.17	0.03	0.25
Net income per common share (in dollars per share)	$ 0.35	$ 1.05	$ 0.91	$ 2.37
Weighted average shares outstanding	190,048	189,581	190,086	189,789
DIVIDENDS PER COMMON SHARE (in dollars per share)	$ 0.63	$ 0.63	$ 1.89	$ 1.89

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income	$ 100,604	$ 235,240	$ 277,378	$ 575,886
Other comprehensive income (loss):
Increase (reduction) in unrealized net gain on available-for-sale securities	3,685	(7,064)	42,798	(53,396)
Pro rata share of other comprehensive loss of nonconsolidated subsidiaries	(915)	(114)	(1,537)	(1,148)
Increase (reduction) in value of interest rate swaps and other	7,689	(289)	(3,482)	1,788
Comprehensive income	111,063	227,773	315,157	523,130
Less comprehensive income attributable to noncontrolling interests	(8,665)	(15,559)	(40,097)	(63,477)
Comprehensive income attributable to Vornado	$ 102,398	$ 212,214	$ 275,060	$ 459,653

Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands	Total	Real estate fund investments	Other	Preferred Shares	Preferred Shares Series J Preferred Stock	Common Shares	Additional Capital	Earnings Less Than Distributions	Accumulated Other Comprehensive Income	Non-controlling Interests in Consolidated Subsidiaries	Non-controlling Interests in Consolidated Subsidiaries Real estate fund investments	Non-controlling Interests in Consolidated Subsidiaries Other
Beginning balance, Shares at Dec. 31, 2014				52,679		187,887
Beginning balance, Value at Dec. 31, 2014	$ 7,489,382			$ 1,277,026		$ 7,493	$ 6,873,025	$ (1,505,385)	$ 93,267	$ 743,956
Net income attributable to Vornado	509,327							509,327
Net income attributable to noncontrolling interests in consolidated subsidiaries	38,370	$ 29,453								38,370
Distribution of Urban Edge Properties	(464,603)							(464,262)		(341)
Dividends on common shares	(355,945)							(355,945)
Dividends on preferred shares	(60,213)							(60,213)
Common shares issued:
Upon redemption of Class A units, at redemption value, Shares						437
Upon redemption of Class A units, at redemption value, Value	46,693					$ 17	46,676
Under employees' share option plan, Shares						198
Under employees' share option plan, Value	11,626					$ 8	14,197	(2,579)
Under dividend reinvestment plan, Shares						11
Under dividend reinvestment plan, Value	1,068						1,068
Contributions:
Contributions		51,725									$ 51,725
Distributions:
Distributions	(22,502)	(70,875)	$ (397)								(70,875)	$ (397)
Conversion of Series A preferred shares to common shares, Shares				(1)		2
Conversion of Series A preferred shares to common shares, Value				$ (41)			41
Deferred compensation shares and options, Shares						6
Deferred compensation shares and options, Value	1,688					$ 1	2,046	(359)
Increase (reduction) in unrealized net gain on available-for-sale securities	(53,396)								(53,396)
Pro rata share of other comprehensive loss of nonconsolidated subsidiaries	(1,148)								(1,148)
Increase (Reduction) in value of interest rate swap	1,783								1,783
Adjustments to carry redeemable Class A units at redemption value	295,713						295,713
Redeemable noncontrolling interests' share of above adjustments	3,082								3,082
Other	621							700	5	(84)
Ending balance, Shares at Sep. 30, 2015				52,678		188,541
Ending balance, Value at Sep. 30, 2015	7,444,501			$ 1,276,985		$ 7,519	7,232,766	(1,878,716)	43,593	762,354
Beginning balance, Shares at Dec. 31, 2015				52,677		188,577
Beginning balance, Value at Dec. 31, 2015	7,476,078			$ 1,276,954		$ 7,521	7,132,979	(1,766,780)	46,921	778,483
Net income attributable to Vornado	239,607							239,607
Net income attributable to noncontrolling interests in consolidated subsidiaries	26,361	15,088								26,361
Dividends on common shares	(356,863)							(356,863)
Dividends on preferred shares	(59,774)							(59,774)
Redemption of Series J preferred shares, Shares					(9,850)
Redemption of Series J preferred shares, Value	(246,250)				$ (238,842)			(7,408)
Common shares issued:
Upon redemption of Class A units, at redemption value, Shares						293
Upon redemption of Class A units, at redemption value, Value	28,126					$ 12	28,114
Under employees' share option plan, Shares						106
Under employees' share option plan, Value	5,940					$ 4	5,936
Under dividend reinvestment plan, Shares						12
Under dividend reinvestment plan, Value	1,080						1,080
Contributions:
Contributions			19,699									19,699
Distributions:
Distributions	(23,582)	$ (59,843)	$ (11,631)								$ (59,843)	$ (11,631)
Deferred compensation shares and options, Shares						7
Deferred compensation shares and options, Value	1,185					$ 1	1,370	(186)
Increase (reduction) in unrealized net gain on available-for-sale securities	42,798								42,798
Pro rata share of other comprehensive loss of nonconsolidated subsidiaries	(1,537)								(1,537)
Increase (Reduction) in value of interest rate swap	(3,482)								(3,482)
Adjustments to carry redeemable Class A units at redemption value	(30,260)						(30,260)
Redeemable noncontrolling interests' share of above adjustments	(2,326)								(2,326)
Other	78			$ (1)		$ (1)	1	(7)		86
Other, Shares						(1)
Ending balance, Shares at Sep. 30, 2016				42,827		188,994
Ending balance, Value at Sep. 30, 2016	$ 7,068,986			$ 1,038,111		$ 7,537	$ 7,139,220	$ (1,951,411)	$ 82,374	$ 753,155

Consolidated Statements of Cash Flows $ in Thousands	9 Months Ended
Consolidated Statements of Cash Flows $ in Thousands	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Cash Flows from Operating Activities:
Net income	$ 277,378	$ 575,886
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	446,040	420,494
Real estate impairment losses	161,165	256
Net gain on disposition of wholly owned and partially owned assets	(160,225)	(104,897)
Straight-lining of rental income	(118,798)	(108,529)
Return of capital from real estate fund investments	71,888	91,036
Distributions of income from partially owned entities	58,692	51,650
Amortization of below-market leases, net	(41,676)	(45,918)
Other non-cash adjustments	33,971	35,190
Net realized and unrealized gains on real estate fund investments	(16,513)	(38,781)
Net gains on sale of real estate and other	(5,074)	(65,396)
Equity in net (income) loss of partially owned entities	(529)	7,961
Reversal of allowance for deferred tax assets	0	(90,030)
Changes in operating assets and liabilities:
Real estate fund investments	0	(95,010)
Tenant and other receivables, net	(578)	1,892
Prepaid assets	(71,068)	(77,899)
Other assets	(50,938)	(92,413)
Accounts payable and accrued expenses	6,530	(5,799)
Other liabilities	(16,018)	(16,168)
Net cash provided by operating activities	574,247	443,525
Cash Flows from Investing Activities:
Development costs and construction in progress	(426,641)	(339,586)
Additions to real estate	(261,971)	(207,845)
Proceeds from sales of real estate and related investments	138,034	375,850
Investments in partially owned entities	(112,797)	(144,890)
Distributions of capital from partially owned entities	100,997	31,822
Acquisitions of real estate and other	(46,801)	(388,565)
Net deconsolidation of 7 West 34th Street	(42,000)	0
Restricted cash	(24,796)	201,895
Investments in loans receivable and other	(11,700)	(25,845)
Purchases of marketable securities	(4,379)	0
Proceeds from sales and repayments of mortgage and mezzanine loans receivable and other	33	16,781
Net cash used in investing activities	(692,021)	(480,383)
Cash Flows from Financing Activities:
Proceeds from borrowings	2,000,604	2,876,460
Repayments of borrowings	(1,591,554)	(2,539,677)
Dividends paid on common shares	(356,863)	(355,945)
Redemption of preferred shares	(246,250)	0
Distributions to noncontrolling interests	(95,055)	(93,738)
Dividends paid on preferred shares	(64,006)	(60,213)
Debt issuance and other costs	(30,846)	(37,467)
Contributions from noncontrolling interests	11,900	51,725
Proceeds received from exercise of employee share options	7,020	15,273
Repurchase of shares related to stock compensation agreements and related tax withholdings and other	(186)	(4,900)
Cash included in the spin-off of Urban Edge Properties	0	(225,000)
Net cash used in financing activities	(365,236)	(373,482)
Net decrease in cash and cash equivalents	(483,010)	(410,340)
Cash and cash equivalents at beginning of period	1,835,707	1,198,477
Cash and cash equivalents at end of period	1,352,697	788,137
Supplemental Disclosure Of Cash Flow Information:
Cash payments for interest, excluding capitalized interest of $21,297 and $40,924	275,979	256,254
Cash payments for income taxes	7,602	7,640
Non-Cash Investing and Financing Activities:
Write-off of fully depreciated assets	(283,496)	(127,788)
Accrued capital expenditures included in accounts payable and accrued expenses	129,704	95,535
Change in unrealized net gain on securities available-for-sale	42,798	(53,396)
Adjustments to carry redeemable Class A units at redemption value	(30,260)	295,713
Decrease in assets and liabilities resulting from the deconsolidation of investments that were previously consolidated
Real estate, net	(122,047)	0
Mortgages payable, net	(290,418)	0
Non-cash distribution of Urban Edge Properties:
Assets	0	1,722,263
Liabilities	0	(1,482,660)
Equity	0	(239,603)
Transfer of interest in real estate to Pennsylvania Real Estate Investment Trust	0	(145,313)
Class A units in connection with acquisition		80,000
Financing assumed in acquisitions		62,000
Acquisitions
Non-cash distribution of Urban Edge Properties:
Like-kind exchange of real estate	46,698	80,269
Dispositions
Non-cash distribution of Urban Edge Properties:
Like-kind exchange of real estate	$ (29,639)	$ (213,621)

Consolidated Statements of Cash Flows (Parentheticals) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Cash Flows [Abstract]
Capitalized interest	$ 21,297	$ 40,924

Organization	9 Months Ended
Organization	Sep. 30, 2016
Organization [Abstract]
Organization	1. Organization Vornado Realty Trust (“Vornado”) is a fully-integrated real estate investment trust (“REIT”) and conducts its business through, and all of its interests in properties are held by, Vornado Realty L.P., a Delaware limited partnership (the “Operating Partnership”). Vornado is the sole general partner of, and owned approximately 93.7% of the common limited partnership interest in, the Operating Partnership at September 30, 2016. All references to “we,” “us,” “our,” the “Company” and “Vornado” refer to Vornado Realty Trust and its consolidated subsidiaries, including the Operating Partnership.

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2016
Basis of Presentation [Abstract]
Basis Of Presentation	2. Basis of Presentation The accompanying consolidated financial statements are unaudited and include the accounts of Vornado and its consolidated subsidiaries, including the Operating Partnership. All inter-company amounts have been eliminated. In our opinion, all adjustments (which include only normal recurring adjustments) necessary to present fairly the financial position, results of operations and changes in cash flows have been made. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted. These condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q of the Securities and Exchange Commission (“SEC”) and should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K, as amended, for the year ended December 31, 2015, as filed with the SEC. We have made estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. The results of operations for the three and nine months ended September 30, 2016 are not necessarily indicative of the operating results for the full year.

Recently Issued Accounting Literature

9 Months Ended

Sep. 30, 2016

Recently Issued Accounting Literature [Abstract]

Recently Issued Accounting Literature

3. Recently Issued Accounting Literature

In May 2014, the Financial Accounting Standards Board (“FASB”) issued an update ("ASU 2014-09") establishing Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers (“ASC 606”). ASU 2014-09 establishes a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most of the existing revenue recognition guidance. ASU 2014-09 requires an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services and also requires certain additional disclosures. In August 2015, the FASB issued an update (“ASU 2015-14”) to ASC 606, Deferral of the Effective Date, which defers the adoption of ASU 2014-09 to interim and annual reporting periods in fiscal years that begin after December 15, 2017. In March 2016, the FASB issued an update (“ASU 2016-08”) to ASC 606, Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which clarifies the implementation guidance on principal versus agent considerations in the new revenue recognition standard pursuant to ASU 2014-09. In April 2016, the FASB issued an update (“ASU 2016-10”) to ASC 606, Identifying Performance Obligations and Licensing, which clarifies guidance related to identifying performance obligations and licensing implementation guidance contained in ASU 2014-09. In May 2016, the FASB issued an update (“ASU 2016-12”) to ASC 606, Narrow-Scope Improvements and Practical Expedients, which amends certain aspects of the new revenue recognition standard pursuant to ASU 2014-09. We are currently evaluating the impact of the adoption of these ASUs on our consolidated financial statements.

In June 2014, the FASB issued an update (“ASU 2014-12”) to ASC Topic 718, Compensation – Stock Compensation (“ASC 718”). ASU 2014-12 requires an entity to treat performance targets that can be met after the requisite service period of a share based award has ended, as a performance condition that affects vesting. ASU 2014-12 is effective for interim and annual reporting periods in fiscal years that began after December 15, 2015. The adoption of this update as of January 1, 2016, did not have any impact on our consolidated financial statements.

In February 2015, the FASB issued an update (“ASU 2015-02”) Amendments to the Consolidation Analysis to ASC Topic 810, Consolidation. ASU 2015-02 affects reporting entities that are required to evaluate whether they should consolidate certain legal entities. Specifically, the amendments: (i) modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIEs") or voting interest entities, (ii) eliminate the presumption that a general partner should consolidate a limited partnership, (iii) affect the consolidation analysis of reporting entities that are involved with VIEs, and (iv) provide a scope exception for certain entities. ASU 2015-02 is effective for interim and annual reporting periods beginning after December 15, 2015. The adoption of this update on January 1, 2016 resulted in the identification of additional VIEs, but did not have an impact on our consolidated financial statements other than additional disclosures (see Note 15 - Variable Interest Entities).

In January 2016, the FASB issued an update (“ASU 2016-01”) Recognition and Measurement of Financial Assets and Financial Liabilities to ASC Topic 825, Financial Instruments. ASU 2016-01 amends certain aspects of recognition, measurement, presentation and disclosure of financial instruments, including the requirement to measure certain equity investments at fair value with changes in fair value recognized in net income. ASU 2016-01 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. We are currently evaluating the impact of the adoption of ASU 2016-01 on our consolidated financial statements.

In February 2016, the FASB issued (“ASU 2016-02”) Leases, which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. ASU 2016-02 requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase. Lessees are required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases. Lessees will recognize expense based on the effective interest method for finance leases or on a straight-line basis for operating leases. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance. ASU 2016-02 is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. We are currently evaluating the impact of the adoption of ASU 2016-02 on our consolidated financial statements.

In March 2016, the FASB issued an update (“ASU 2016-09”) Improvements to Employee Share-Based Payment Accounting to ASC 718. ASU 2016-09 amends several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. We are currently evaluating the impact of the adoption of ASU 2016-09 on our consolidated financial statements.

In August 2016, the FASB issued an update (“ASU 2016-15”) Classification of Certain Cash Receipts and Cash Payments to ASC Topic 230, Statement of Cash Flows. ASU 2016-15 clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows to reduce diversity in practice with respect to (i) debt prepayment or debt extinguishment costs, (ii) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (iii) contingent consideration payments made after a business combination, (iv) proceeds from the settlement of insurance claims, (v) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (vi) distributions received from equity method investees, (vii) beneficial interests in securitization transactions, and (viii) separately identifiable cash flows and application of the predominance principle. ASU 2016-15 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017, with early adoption permitted. The adoption of this update is not expected to have a significant impact on our consolidated financial statements.

- Definition

The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6507316

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6510796

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+ Details

Acquisitions	9 Months Ended
Acquisitions	Sep. 30, 2016
Acquisitions [Abstract]
Acquisitions	4. Acquisitions On May 20, 2016, we contributed $19,650,000 for a 50.0% equity interest in a joint venture that will develop 606 Broadway, a 33,000 square foot office and retail building, located on Houston Street in Manhattan. The development cost of this project is estimated to be approximately $104,000,000. At closing, the joint venture obtained a $65,000,000 construction loan, of which approximately $22,500,000 was outstanding at September 30, 2016. The loan, which bears interest at LIBOR plus 3.00% (3.52% at September 30, 2016), matures in May 2019 with two one-year extension options. Because this joint venture is a VIE and we determined we are the primary beneficiary, we consolidate the accounts of this joint venture from the date of our investment.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

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+ Details

Real Estate Fund Investments

9 Months Ended

Sep. 30, 2016

Real Estate Fund Investments [Abstract]

Real Estate Fund Investments

5. Real Estate Fund Investments

We are the general partner and investment manager of Vornado Capital Partners Real Estate Fund (the “Fund”), which has an eight-year term and a three-year investment period that ended in July 2013. The Fund is accounted for under ASC 946, Financial Services – Investment Companies (“ASC 946”) and its investments are reported on its balance sheet at fair value, with changes in value each period recognized in earnings. We consolidate the accounts of the Fund into our consolidated financial statements, retaining the fair value basis of accounting.

We are also the general partner and investment manager of Crowne Plaza Times Square Hotel Co-Investment (the “Co-Investment”), which owns the 24.7% interest in the Crowne Plaza Times Square Hotel not owned by the Fund. The Co-Investment is also accounted for under ASC 946. We consolidate the accounts of the Co-Investment into our consolidated financial statements, retaining the fair value basis of accounting.

At September 30, 2016, we had six real estate fund investments with an aggregate fair value of $519,386,000, or $210,451,000 in excess of cost, and had remaining unfunded commitments of $117,907,000, of which our share was $34,422,000. Below is a summary of income from the Fund and the Co-Investment for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)		For the Three Months Ended				For the Nine Months Ended
		September 30,				September 30,
		2016		2015		2016		2015
Net investment income		$	5,841	$	5,116	$	12,237	$	13,716
Net unrealized (losses) gains on held investments			(4,764)		(2,544)		16,091		37,001
Net realized (losses) gains on exited investments			-		(907)		14,676		24,684
Previously recorded unrealized gain on exited investment			-		-		(14,254)		(23,279)
Income from real estate fund investments			1,077		1,665		28,750		52,122
Less income attributable to noncontrolling interests			(270)		(42)		(15,088)		(29,453)
Income from real estate fund investments
	attributable to Vornado ⁽¹⁾	$	807	$	1,623	$	13,662	$	22,669


(1)	Excludes management, leasing and development fees of $804 and $678 for the three months ended September 30, 2016 and 2015, respectively, and $2,499 and $2,015 for the nine months ended September 30, 2016 and 2015, respectively, which are included as a component of "fee and other income" in our consolidated statements of income.

Marketable Securities

9 Months Ended

Sep. 30, 2016

Marketable Securities [Abstract]

Marketable Securities

6. Marketable Securities

Below is a summary of our marketable securities portfolio as of September 30, 2016 and December 31, 2015.

(Amounts in thousands)		As of September 30, 2016						As of December 31, 2015
				GAAP		Unrealized				GAAP		Unrealized
		Fair Value		Cost		Gain		Fair Value		Cost		Gain
Equity securities:
	Lexington Realty Trust	$	190,230	$	72,549	$	117,681	$	147,752	$	72,549	$	75,203
	Other		7,935		4,379		3,556		3,245		-		3,245
		$	198,165	$	76,928	$	121,237	$	150,997	$	72,549	$	78,448

Investments in Partially Owned Entities

9 Months Ended

Sep. 30, 2016

Equity Method Investments and Joint Ventures [Abstract]

Investments in Partially Owned Entities

7. Investments in Partially Owned Entities

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

As of September 30, 2016, we own 1,654,068 Alexander’s common shares, representing a 32.4% interest in Alexander’s. We account for our investment in Alexander’s under the equity method. We manage, lease and develop Alexander’s properties pursuant to agreements which expire in March of each year and are automatically renewable.

As of September 30, 2016, the market value (“fair value” pursuant to ASC Topic 820, Fair Value Measurements (“ASC 820”)) of our investment in Alexander’s, based on Alexander’s September 30, 2016 closing share price of $419.60, was $694,047,000, or $563,562,000 in excess of the carrying amount on our consolidated balance sheet. As of September 30, 2016, 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 $39,778,000. 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.

Urban Edge Properties (“UE”) (NYSE: UE)

As of September 30, 2016, we own 5,717,184 UE operating partnership units, representing a 5.4% ownership interest in UE. We account for our investment in UE under the equity method and record our share of UE’s net income or loss on a one-quarter lag basis. During 2015, we provided transition services to UE, primarily for information technology, human resources, tax and financial planning. In 2016, we continue to provide UE information technology support. UE is providing us with leasing and property management services for (i) certain small retail properties that we plan to sell, and (ii) our affiliate, Alexander’s, Rego Park retail assets. As of September 30, 2016, the fair value of our investment in UE, based on UE’s September 30, 2016 closing share price of $28.14, was $160,882,000, or $135,065,000 in excess of the carrying amount on our consolidated balance sheet.

Pennsylvania Real Estate Investment Trust (“PREIT”) (NYSE: PEI)

As of September 30, 2016, we own 6,250,000 PREIT operating partnership units, representing an 8.0% interest in PREIT. We account for our investment in PREIT under the equity method and record our share of PREIT’s net income or loss on a one-quarter lag basis. As of September 30, 2016, the fair value of our investment in PREIT, based on PREIT’s September 30, 2016 closing share price of $23.03, was $143,938,000, or $19,638,000 in excess of the carrying amount on our consolidated balance sheet. As of September 30, 2016, the carrying amount of our investment in PREIT exceeds our share of the equity in the net assets of PREIT by approximately $66,596,000. The majority of this basis difference resulted from the excess of the fair value of the PREIT operating units received over our share of the book value of PREIT’s net assets. Substantially all of this basis difference was allocated, based on our estimates of the fair values of PREIT’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 PREIT’s net loss. The basis difference related to the land will be recognized upon disposition of our investment.

One Park Avenue

On March 7, 2016, the joint venture, in which we have a 55% ownership interest, completed a $300,000,000 refinancing of One Park Avenue, a 947,000 square foot Manhattan office building. The loan matures in March 2021 and is interest only at LIBOR plus 1.75% (2.28% at September 30, 2016). The property was previously encumbered by a 4.995%, $250,000,000 mortgage which matured in March 2016.

Mezzanine Loan – New York

On March 17, 2016, we entered into a joint venture, in which we own a 33.3% interest, which owns a $146,004,000 mezzanine loan. The interest rate is LIBOR plus 8.875% (9.38% at September 30, 2016) and the debt matures in November 2016, with two three-month extension options. At September 30, 2016, the joint venture has a $3,996,000 remaining commitment, of which our share is $1,332,000. The joint venture’s investment is subordinate to $350,000,000 of third party debt. We account for our investment in the joint venture under the equity method.

The Warner Building

On May 6, 2016, the joint venture, in which we have a 55% ownership interest, completed a $273,000,000 refinancing of The Warner Building, a 621,000 square foot Washington, DC office building. The loan matures in June 2023, has a fixed rate of 3.65%, is interest only for the first two years and amortizes based on a 30-year schedule beginning in year three. The property was previously encumbered by a 6.26%, $293,000,000 mortgage which matured in May 2016.

280 Park Avenue

On May 11, 2016, the joint venture, in which we have a 50% ownership interest, completed a $900,000,000 refinancing of 280 Park Avenue, a 1,250,000 square foot Manhattan office building. The three-year loan with four one-year extensions is interest only at LIBOR plus 2.00% (2.51% at September 30, 2016). The property was previously encumbered by a 6.35%, $721,000,000 mortgage which was scheduled to mature in June 2016.

7 West 34th Street

On May 16, 2016, we completed a $300,000,000 recourse financing of 7 West 34th Street, a 477,000 square foot Manhattan office building leased to Amazon. The ten-year loan is interest only at a fixed rate of 3.65% and matures in June 2026. Subsequently, on May 27, 2016, we sold a 47% ownership interest in this property and retained the remaining 53% interest. This transaction was based on a property value of approximately $561,000,000 or $1,176 per square foot. We received net proceeds of $127,382,000 from the sale and realized a net gain of $203,324,000, of which $159,511,000 was recognized in the second quarter and is included in “net gain on disposition of wholly owned and partially owned assets” in our consolidated statements of income. The remaining net gain of $43,813,000 has been deferred until our guarantee of payment of loan principal and interest is removed or the loan is repaid. We realized a net tax gain of $90,017,000. We continue to manage and lease the property. We share control over major decisions with our joint venture partner. Accordingly, this property is accounted for under the equity method from the date of sale.

50-70 West 93rd Street

On August 3, 2016, the joint venture, in which we have 49.9% ownership interest, completed an $80,000,000 refinancing of 50-70 West 93rd Street, a 326 unit Manhattan residential complex. The three-year loan with two one-year extensions is interest only at LIBOR plus 1.70% (2.22% at September 30, 2016). The property was previously encumbered by a $44,980,000 first mortgage at LIBOR plus 1.90% and an $18,481,000 second mortgage at LIBOR plus 1.65%, which were scheduled to mature in September 2016.

Below are schedules summarizing our investments in, and income (loss) from, partially owned entities.

(Amounts in thousands)		Percentage
		Ownership at		Balance as of
		September 30, 2016		September 30, 2016		December 31, 2015
Investments:
	Partially owned office buildings⁽¹⁾		Various	$	811,062	$	909,782
	Alexander’s		32.4%		130,485		133,568
	PREIT		8.0%		124,300		133,375
	India real estate ventures		4.1%-36.5%		44,671		48,310
	UE		5.4%		25,817		25,351
	Other investments⁽²⁾		Various		361,590		300,036
				$	1,497,925	$	1,550,422

	7 West 34th Street⁽³⁾		53.0%	$	(41,439)	$	-


(1)	Includes interests in 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue, 512 West 22nd Street and others.
(2)	Includes interests in Independence Plaza, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street, Toys "R" Us, Inc. (which has a carrying amount of zero) and others.
(3)	Our negative basis results from a $43,813 deferred gain from the sale of a 47.0% ownership interest in the property and is included in "other liabilities" on our consolidated balance sheet.

(Amounts in thousands)				Percentage		For the Three Months Ended				For the Nine Months Ended
				Ownership at		September 30,				September 30,
				September 30, 2016		2016		2015		2016		2015
Our Share of Net Income (Loss):
		Alexander's (see page 13 for details):
			Equity in net income		32.4%	$	6,891	$	5,716	$	20,640	$	16,757
			Management, leasing and development fees				1,894		1,828		5,307		5,801
							8,785		7,544		25,947		22,558
		UE (see page 13 for details):
			Equity in net earnings		5.4%		1,949		934		3,896		1,338
			Management fees				209		466		627		1,550
							2,158		1,400		4,523		2,888

		Partially owned office buildings⁽¹⁾			Various		(9,157)		(2,039)		(35,868)		(14,573)

		India real estate ventures			4.1%-36.5%		(917)		(1,704)		(3,537)		(18,380)	⁽²⁾

		PREIT (see page 13 for details):			8.0%		52		(3,481)		(4,763)		(3,845)

		Other investments⁽³⁾			Various		3,206		(2,045)		14,227		2,643

						$	4,127	$	(325)	$	529	$	(8,709)


(1)	Includes interests in 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 7 West 34th Street, 330 Madison Avenue, 512 West 22nd Street and others. We recognized our share of a write-off of a below market lease liability related to a tenant vacating at 650 Madison of $7,364 and $12,751 for the three and nine months ended September 30, 2015, respectively.
(2)	Includes $14,806 for our share of non-cash impairment losses.
(3)	Includes interests in Independence Plaza, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street, Toys "R" Us, Inc. and others.

Dispositions

9 Months Ended

Sep. 30, 2016

Dispositions [Abstract]

Dispositions

8. Dispositions

Discontinued Operations

The tables below set forth the assets and liabilities related to discontinued operations at September 30, 2016 and December 31, 2015 and their combined results of operations and cash flows for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)	Balance as of
	September 30, 2016		December 31, 2015
Assets related to discontinued operations:
Real estate, net	$	2,642	$	29,561
Other assets		2,904		7,459
	$	5,546	$	37,020

Liabilities related to discontinued operations:
Other liabilities	$	3,284	$	12,470

(Amounts in thousands)	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Income from discontinued operations:
Total revenues	$	676	$	2,589	$	2,805	$	24,868
Total expenses		106		1,279		1,254		16,672
		570		1,310		1,551		8,196
Net gains on sale of real estate and a lease position		2,864		33,153		5,074		65,396
Impairment losses		(465)		-		(465)		(256)
UE spin-off transaction related costs		-		-		-		(22,972)
Pretax income from discontinued operations		2,969		34,463		6,160		50,364
Income tax expense		-		-		-		(86)
Income from discontinued operations	$	2,969	$	34,463	$	6,160	$	50,278

(Amounts in thousands)					For the Nine Months Ended
					September 30,
					2016		2015
Cash flows related to discontinued operations:
Cash flows from operating activities					$	850	$	(34,490)
Cash flows from investing activities						2,785		348,697

- Definition

The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

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-URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721683-107760

+ Details

Identified Intangible Assets and Liabilities

9 Months Ended

Sep. 30, 2016

Identified Intangible Assets and Liabilities [Abstract]

Identified Intangible Assets and Liabilities

9. Identified Intangible Assets and Liabilities

The following summarizes our identified intangible assets (primarily above-market leases) and liabilities (primarily acquired below-market leases) as of September 30, 2016 and December 31, 2015.

(Amounts in thousands)	Balance as of
	September 30, 2016		December 31, 2015
Identified intangible assets:
Gross amount	$	402,614	$	415,261
Accumulated amortization		(201,164)		(187,360)
Net	$	201,450	$	227,901
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	587,157	$	643,488
Accumulated amortization		(310,685)		(325,340)
Net	$	276,472	$	318,148

Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase to rental income of $11,868,000 and $19,786,000 for the three months ended September 30, 2016 and 2015, respectively, and $41,676,000 and $45,614,000 for the nine months ended September 30, 2016 and 2015, respectively. Estimated annual amortization of acquired below-market leases, net of acquired above-market leases, for each of the five succeeding years commencing January 1, 2017 is as follows:

(Amounts in thousands)
2017	$	45,591
2018		44,331
2019		32,168
2020		23,342
2021		18,159

Amortization of all other identified intangible assets (a component of depreciation and amortization expense) was $6,918,000 and $12,908,000 for the three months ended September 30, 2016 and 2015, respectively, and $22,777,000 and $24,402,000 for the nine months ended September 30, 2016 and 2015, respectively. Estimated annual amortization of all other identified intangible assets including acquired in-place leases, customer relationships, and third party contracts for each of the five succeeding years commencing January 1, 2017 is as follows:

(Amounts in thousands)
2017	$	24,502
2018		20,251
2019		15,912
2020		12,441
2021		11,209

We are a tenant under ground leases for certain properties. Amortization of these acquired below-market leases, net of above-market leases, resulted in an increase to rent expense of $458,000 and $458,000 for the three months ended September 30, 2016 and 2015, respectively, and $1,374,000 and $1,374,000 for the nine months ended September 30, 2016 and 2015. Estimated annual amortization of these below-market leases, net of above-market leases, for each of the five succeeding years commencing January 1, 2017 is as follows:

(Amounts in thousands)
2017	$	1,832
2018		1,832
2019		1,832
2020		1,832
2021		1,832

Debt

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Debt

10. Debt

The following is a summary of our debt:

(Amounts in thousands)			Interest Rate at		Balance at
			September 30, 2016		September 30, 2016		December 31, 2015
Mortgages Payable:
	Fixed rate			3.90%	$	6,685,606	$	6,356,634
	Variable rate			2.34%		3,282,893		3,258,204
		Total		3.39%		9,968,499		9,614,838
	Deferred financing costs, net and other					(100,949)		(101,125)
		Total, net			$	9,867,550	$	9,513,713

Unsecured Debt:
	Senior unsecured notes			3.68%	$	850,000	$	850,000
	Deferred financing costs, net and other					(4,777)		(5,841)
		Senior unsecured notes, net				845,223		844,159

	Unsecured term loan			1.67%		375,000		187,500
	Deferred financing costs, net and other					(3,165)		(4,362)
		Unsecured term loan, net				371,835		183,138

	Unsecured revolving credit facilities			1.57%		115,630		550,000

		Total, net			$	1,332,688	$	1,577,297

On February 8, 2016, we completed a $700,000,000 refinancing of 770 Broadway, a 1,158,000 square foot Manhattan office building. The five-year loan is interest only at LIBOR plus 1.75%, (2.28% at September 30, 2016) which was swapped for four and a half years to a fixed rate of 2.56%. The Company realized net proceeds of approximately $330,000,000. The property was previously encumbered by a 5.65%, $353,000,000 mortgage which was scheduled to mature in March 2016.

On September 6, 2016, we completed a $675,000,000 refinancing of theMART, a 3,644,000 square foot commercial building in Chicago. The five-year loan is interest only and has a fixed rate of 2.70%. The Company realized net proceeds of approximately $124,000,000. The property was previously encumbered by a 5.57%, $550,000,000 mortgage which was scheduled to mature in December 2016.

Skyline Properties

On March 15, 2016, we notified the servicer of the $678,000,000 non-recourse mortgage loan on the Skyline properties in Virginia that cash flow will be insufficient to service the debt and pay other property related costs and expenses and that we were not willing to fund additional cash shortfalls. Accordingly, at our request, the loan has been transferred to the special servicer. Consequently, based on our shortened estimated holding period for the underlying assets, we concluded that the excess of carrying amount over our estimate of fair value was not recoverable and recognized a $160,700,000 non-cash impairment loss in the first quarter of 2016. The Company’s estimate of fair value was derived from a discounted cash flow model based upon market conditions and expectations of growth and utilized unobservable quantitative inputs including a capitalization rate of 8.0% and a discount rate of 8.2%. In the second quarter of 2016, cash flow became insufficient to service the debt and we ceased making debt service payments. Pursuant to the loan agreement, the loan is in default, causing the loan to be immediately due and payable, and is subject to incremental default interest which increased the weighted average interest rate from 2.97% to 4.51% while the outstanding balance remains unpaid. For the three and nine months ended September 30, 2016, we accrued $2,632,000 and $5,343,000 of default interest expense, respectively. We continue to negotiate with the special servicer. There can be no assurance as to the timing or ultimate resolution of this matter.

Redeemable Noncontrolling Interests

9 Months Ended

Sep. 30, 2016

Redeemable Noncontrolling Interests [Abstract]

Redeemable Noncontrolling Interests

11. Redeemable Noncontrolling Interests

Redeemable noncontrolling interests on our consolidated balance sheets are comprised primarily of Class A Operating Partnership units held by third parties and 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. Below is a table summarizing the activity of redeemable noncontrolling interests.

(Amounts in thousands)
Balance at December 31, 2014	$	1,337,780
Net income		28,189
Other comprehensive loss		(3,082)
Distributions		(22,502)
Redemption of Class A units for common shares, at redemption value		(46,693)
Adjustments to carry redeemable Class A units at redemption value		(295,713)
Issuance of Class A units		80,000
Issuance of Series D-17 preferred units		4,428
Other, net		31,478
Balance at September 30, 2015	$	1,113,885

Balance at December 31, 2015	$	1,229,221
Net income		11,410
Other comprehensive income		2,326
Distributions		(23,582)
Redemption of Class A units for common shares, at redemption value		(28,126)
Adjustments to carry redeemable Class A units at redemption value		30,260
Other, net		26,814
Balance at September 30, 2016	$	1,248,323

As of September 30, 2016 and December 31, 2015, the aggregate redemption value of redeemable Class A units was $1,242,895,000 and $1,223,793,000, respectively.

Redeemable noncontrolling interests exclude our Series G-1 through G-4 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. Accordingly, the fair value of these units is included as a component of “other liabilities” on our consolidated balance sheets and aggregated $50,561,000 as of September 30, 2016 and December 31, 2015. Changes in the value from period to period, if any, are charged to “interest and debt expense” in our consolidated statements of income.

Shareholders Equity	9 Months Ended
Shareholders Equity	Sep. 30, 2016
Shareholders Equity [Abstract]
Shareholders' Equity	12. Shareholders’ Equity On September 1, 2016, we redeemed all of the outstanding 6.875% Series J cumulative redeemable preferred shares at their redemption price of $25.00 per share, or $246,250,000 in the aggregate, plus accrued and unpaid dividends through the date of redemption. In connection therewith, we expensed $7,408,000 of issuance costs, which reduced net income attributable to common shareholders in the three months ended September 30, 2016. These costs had been initially recorded as a reduction of shareholders’ equity.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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-Name Staff Accounting Bulletin (SAB)
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+ Details

Accumulated Other Compreshensive Income ("AOCI")

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (AOCI) [Abstract]

Accumulated Other Comprehensive Income ("AOCI") [Text Block]

13. Accumulated Other Comprehensive Income (“AOCI”)

The following tables set forth the changes in accumulated other comprehensive income by component.

(Amounts in thousands)				Securities		Pro rata share of		Interest
				available-		nonconsolidated		rate
		Total		for-sale		subsidiaries' OCI		swaps		Other
For the Three Months Ended September 30, 2016
Balance as of June 30, 2016		$	72,556	$	117,561	$	(9,941)	$	(30,538)	$	(4,526)
	OCI before reclassifications		9,818		3,685		(915)		7,688		(640)
	Amounts reclassified from AOCI		-		-		-		-		-
Net current period OCI			9,818		3,685		(915)		7,688		(640)
Balance as of September 30, 2016		$	82,374	$	121,246	$	(10,856)	$	(22,850)	$	(5,166)

For the Three Months Ended September 30, 2015
Balance as of June 30, 2015		$	50,613	$	87,442	$	(10,026)	$	(23,730)	$	(3,073)
	OCI before reclassifications		(7,020)		(7,064)		(114)		(290)		448
	Amounts reclassified from AOCI		-		-		-		-		-
Net current period OCI			(7,020)		(7,064)		(114)		(290)		448
Balance as of September 30, 2015		$	43,593	$	80,378	$	(10,140)	$	(24,020)	$	(2,625)

For the Nine Months Ended September 30, 2016
Balance as of December 31, 2015		$	46,921	$	78,448	$	(9,319)	$	(19,368)	$	(2,840)
	OCI before reclassifications		35,453		42,798		(1,537)		(3,482)		(2,326)
	Amounts reclassified from AOCI		-		-		-		-		-
Net current period OCI			35,453		42,798		(1,537)		(3,482)		(2,326)
Balance as of September 30, 2016		$	82,374	$	121,246	$	(10,856)	$	(22,850)	$	(5,166)

For the Nine Months Ended September 30, 2015
Balance as of December 31, 2014		$	93,267	$	133,774	$	(8,992)	$	(25,803)	$	(5,712)
	OCI before reclassifications		(49,674)		(53,396)		(1,148)		1,783		3,087
	Amounts reclassified from AOCI		-		-		-		-		-
Net current period OCI			(49,674)		(53,396)		(1,148)		1,783		3,087
Balance as of September 30, 2015		$	43,593	$	80,378	$	(10,140)	$	(24,020)	$	(2,625)

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Variable Interest Entities ("VIEs")	9 Months Ended
Variable Interest Entities ("VIEs")	Sep. 30, 2016
Variable Interest Entities [Abstract]
Variable Interest Entities ("VIEs")	14. Variable Interest Entities At September 30, 2016 and December 31, 2015, we have several unconsolidated VIEs. We do not consolidate these entities because we are not the primary beneficiary and the nature of our involvement in the activities of these entities does not give us power over decisions that significantly affect these entities’ economic performance. We account for our investment in these entities under the equity method (see Note 7 – Investments in Partially Owned Entities). As of September 30, 2016 and December 31, 2015, the net carrying amounts of our investment in these entities were $402,592,000 and $379,939,000, respectively, and our maximum exposure to loss in these entities, is limited to our investments. We adopted ASU 2015-02 on January 1, 2016 which resulted in the identification of several VIEs which, prior to the adoption of ASU 2015-02, were consolidated under the voting interest model. Our most significant consolidated VIEs are our Operating Partnership, real estate fund investments, and certain properties that have non-controlling interests. These entities are VIEs because the non-controlling interests do not have substantive kick-out or participating rights. We consolidate these entities because we control all significant business activities. We conduct our business through, and all of our assets and liabilities are held by, our Operating Partnership which is a VIE.

Fair Value Measurements

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurements

15. Fair Value Measurements

ASC 820 defines fair value and establishes a framework for measuring fair value. The objective of fair value is to determine the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price). ASC 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three levels: Level 1 – quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities; Level 2 – observable prices that are based on inputs not quoted in active markets, but corroborated by market data; and Level 3 – unobservable inputs that are used when little or no market data is available. The fair value hierarchy gives the highest priority to Level 1 inputs and the lowest priority to Level 3 inputs. In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, as well as consider counterparty credit risk in our assessment of fair value. Considerable judgment is necessary to interpret Level 2 and 3 inputs in determining the fair value of our financial and non-financial assets and liabilities. Accordingly, our fair value estimates, which are made at the end of each reporting period, may be different than the amounts that may ultimately be realized upon sale or disposition of these assets.

Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

Financial assets and liabilities that are measured at fair value on our consolidated balance sheets consist of (i) marketable securities, (ii) real estate fund investments, (iii) the assets in our deferred compensation plan (for which there is a corresponding liability on our consolidated balance sheet), (iv) mandatorily redeemable instruments (Series G-1 through G-4 convertible preferred units and Series D-13 cumulative redeemable preferred units), and (v) interest rate swaps. The tables below aggregate the fair values of these financial assets and liabilities by their levels in the fair value hierarchy as of September 30, 2016 and December 31, 2015, respectively.

(Amounts in thousands)		As of September 30, 2016
		Total		Level 1		Level 2		Level 3
Marketable securities		$	198,165	$	198,165	$	-	$	-
Real estate fund investments			519,386		-		-		519,386
Deferred compensation plan assets (included in other assets)			118,359		61,444		-		56,915
Interest rate swap (included in other assets)			3,064		-		3,064		-
	Total assets	$	838,974	$	259,609	$	3,064	$	576,301

Mandatorily redeemable instruments (included in other liabilities)		$	50,561	$	50,561	$	-	$	-
Interest rate swaps (included in other liabilities)			23,646		-		23,646		-
	Total liabilities	$	74,207	$	50,561	$	23,646	$	-

(Amounts in thousands)		As of December 31, 2015
		Total		Level 1		Level 2		Level 3
Marketable securities		$	150,997	$	150,997	$	-	$	-
Real estate fund investments			574,761		-		-		574,761
Deferred compensation plan assets (included in other assets)			117,475		58,289		-		59,186
	Total assets	$	843,233	$	209,286	$	-	$	633,947

Mandatorily redeemable instruments (included in other liabilities)		$	50,561	$	50,561	$	-	$	-
Interest rate swaps (included in other liabilities)			19,600		-		19,600		-
	Total liabilities	$	70,161	$	50,561	$	19,600	$	-

Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis - continued

Real Estate Fund Investments

At September 30, 2016, we had six real estate fund investments with an aggregate fair value of $519,386,000, or $210,451,000 in excess of cost. These investments are classified as Level 3. We use a discounted cash flow valuation technique to estimate the fair value of each of these investments, which is updated quarterly by personnel responsible for the management of each investment and reviewed by senior management at each reporting period. The discounted cash flow valuation technique requires us to estimate cash flows for each investment over the anticipated holding period, which currently ranges from 1.0 to 4.3 years. Cash flows are derived from property rental revenue (base rents plus reimbursements) less operating expenses, real estate taxes and capital and other costs, plus projected sales proceeds in the year of exit. Property rental revenue is based on leases currently in place and our estimates for future leasing activity, which are based on current market rents for similar space plus a projected growth factor. Similarly, estimated operating expenses and real estate taxes are based on amounts incurred in the current period plus a projected growth factor for future periods. Anticipated sales proceeds at the end of an investment’s expected holding period are determined based on the net cash flow of the investment in the year of exit, divided by a terminal capitalization rate, less estimated selling costs.

The fair value of each property is calculated by discounting the future cash flows (including the projected sales proceeds), using an appropriate discount rate and then reduced by the property’s outstanding debt, if any, to determine the fair value of the equity in each investment. Significant unobservable quantitative inputs used in determining the fair value of each investment include capitalization rates and discount rates. These rates are based on the location, type and nature of each property, and current and anticipated market conditions, industry publications and from the experience of our Acquisitions and Capital Markets departments. Significant unobservable quantitative inputs in the table below were utilized in determining the fair value of these real estate fund investments at September 30, 2016 and December 31, 2015.

			Weighted Average
	Range		(based on fair value of investments)
Unobservable Quantitative Input	September 30, 2016	December 31, 2015	September 30, 2016	December 31, 2015
Discount rates	12.0% to 14.9%	12.0% to 14.9%	13.7%	13.6%
Terminal capitalization rates	4.7% to 5.8%	4.8% to 6.1%	5.4%	5.5%

The above inputs are subject to change based on changes in economic and market conditions and/or changes in use or timing of exit. Changes in discount rates and terminal capitalization rates result in increases or decreases in the fair values of these investments. The discount rates encompass, among other things, uncertainties in the valuation models with respect to terminal capitalization rates and the amount and timing of cash flows. Therefore, a change in the fair value of these investments resulting from a change in the terminal capitalization rate, may be partially offset by a change in the discount rate. It is not possible for us to predict the effect of future economic or market conditions on our estimated fair values.

The table below summarizes the changes in the fair value of real estate fund investments that are classified as Level 3, for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
		2016		2015	2016		2015
Beginning balance	$	524,150	$	565,976	$	574,761	$	513,973
Purchases		-		11		-		95,011
Dispositions / distributions		-		(8,029)		(71,888)		(91,450)
Net unrealized (losses) gains		(4,764)		(2,544)		16,091		37,001
Net realized (losses) gains		-		(907)		422		1,405
Other, net		-		907		-		(526)
Ending balance	$	519,386	$	555,414	$	519,386	$	555,414

Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis - continued

Deferred Compensation Plan Assets

Deferred compensation plan assets that are classified as Level 3 consist of investments in limited partnerships and investment funds, which are managed by third parties. We receive quarterly financial reports from a third-party administrator, which are compiled from the quarterly reports provided to them from each limited partnership and investment fund. The quarterly reports provide net asset values on a fair value basis which are audited by independent public accounting firms on an annual basis. The third-party administrator does not adjust these values in determining our share of the net assets and we do not adjust these values when reported in our consolidated financial statements.

The table below summarizes the changes in the fair value of deferred compensation plan assets that are classified as Level 3, for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
		2016		2015	2016		2015
Beginning balance	$	60,140	$	67,668	$	59,186	$	63,315
Purchases		1,251		2,153		3,523		8,384
Sales		(3,737)		(171)		(5,888)		(5,264)
Realized and unrealized (losses) gains		(1,055)		(1,466)		(743)		1,256
Other, net		316		24		837		517
Ending balance	$	56,915	$	68,208	$	56,915	$	68,208

Financial Assets and Liabilities not Measured at Fair Value

Financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash equivalents (primarily money market funds, which invest in obligations of the United States government), and our secured and unsecured debt. Estimates of the fair value of these instruments are determined by the standard practice of modeling the contractual cash flows required under the instrument and discounting them back to their present value at the appropriate current risk adjusted interest rate, which is provided by a third-party specialist. For floating rate debt, we use forward rates derived from observable market yield curves to project the expected cash flows we would be required to make under the instrument. The fair value of cash equivalents and borrowings under our unsecured revolving credit facilities and unsecured term loan are classified as Level 1. The fair value of our secured and unsecured debt is classified as Level 2. The table below summarizes the carrying amounts and fair value of these financial instruments as of September 30, 2016 and December 31, 2015.

(Amounts in thousands)		As of September 30, 2016					As of December 31, 2015
		Carrying			Fair		Carrying			Fair
		Amount			Value		Amount			Value
Cash equivalents		$	1,003,149		$	1,003,000	$	1,295,980		$	1,296,000
Debt:
	Mortgages payable	$	9,968,499		$	9,371,000	$	9,614,838		$	9,306,000
	Senior unsecured notes		850,000			896,000		850,000			868,000
	Unsecured term loan		375,000			375,000		187,500			188,000
	Unsecured revolving credit facilities		115,630			116,000		550,000			550,000
	Total	$	11,309,129	⁽¹⁾	$	10,758,000	$	11,202,338	⁽¹⁾	$	10,912,000


(1)	Excludes $108,891 and $111,328 of deferred financing costs, net and other as of September 30, 2016 and December 31, 2015, respectively.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Incentive Compensation	9 Months Ended
Incentive Compensation	Sep. 30, 2016
Incentive Compensation [Abstract]
Incentive Compensation	16. Incentive Compensation Our 2010 Omnibus Share Plan (the “Plan”) provides for grants of incentive and non-qualified stock options, restricted shares, restricted Operating Partnership units and Out-Performance Plan awards to certain of our employees and officers. We account for all equity-based compensation in accordance with ASC 718. Equity-based compensation expense was $6,117,000 and $6,501,000 for the three months ended September 30, 2016 and 2015, respectively, and $27,903,000 and $33,328,000 for the nine months ended September 30, 2016 and 2015, respectively.

Fee and Other Income

9 Months Ended

Sep. 30, 2016

Fee and Other Income [Abstract]

Fee and Other Income

17. Fee and Other Income

The following table sets forth the details of fee and other income:

(Amounts in thousands)	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
BMS cleaning fees	$	20,820	$	18,563	$	57,760	$	62,937
Management and leasing fees		6,644		4,045		16,047		12,511
Lease termination fees		2,118		1,517		7,722		8,157
Other income		8,192		10,036		23,904		29,393
	$	37,774	$	34,161	$	105,433	$	112,998

Management and leasing fees include management fees from Interstate Properties, a related party, of $128,000 and $132,000 for the three months ended September 30, 2016 and 2015, and $390,000 and $403,000 for the nine months ended September 30, 2016 and 2015, respectively. The above table excludes fee income from partially owned entities, which is included in “income (loss) from partially owned entities” (see Note 7 – Investments in Partially Owned Entities).

Interest and Other Investment Income, Net

9 Months Ended

Sep. 30, 2016

Interest and Other Investment Income, Net [Abstract]

Interest and Other Investment Income, Net

18. Interest and Other Investment Income, Net

The following table sets forth the details of interest and other investment income, net:

(Amounts in thousands)		For the Three Months Ended				For the Nine Months Ended
		September 30,				September 30,
		2016		2015		2016		2015
Dividends on marketable securities		$	3,354	$	3,215	$	9,799	$	9,620
Interest on loans receivable			754		1,154		2,250		5,113
Mark-to-market income (loss) of investments in our
	deferred compensation plan⁽¹⁾		204		(2,577)		2,625		(327)
Other, net			2,196		1,368		5,588		5,212
		$	6,508	$	3,160	$	20,262	$	19,618


(1)	This income (loss) is entirely offset by the income (expense) resulting from the mark-to-market of the deferred compensation plan liability, which is included in "general and administrative" expense.

Interest and Debt Expense

9 Months Ended

Sep. 30, 2016

Interest and Debt Expense [Abstract]

Interest And Debt Expense

19. Interest and Debt Expense

The following table sets forth the details of interest and debt expense:

(Amounts in thousands)		For the Three Months Ended				For the Nine Months Ended
		September 30,				September 30,
		2016		2015		2016		2015
Interest expense		$	98,210	$	113,485	$	302,940	$	305,110
Amortization of deferred financing costs			8,539		7,864		26,312		22,817
Capitalized interest and debt expense			(8,384)		(11,005)		(24,822)		(33,817)
Capitalized standby loan commitment termination fee
	(220 Central Park South development project)		-		(15,000)		-		(15,000)
		$	98,365	$	95,344	$	304,430	$	279,110

Income Per Share

9 Months Ended

Sep. 30, 2016

Income Per Share [Abstract]

Income Per Share

20. Income Per Share

The following table provides a reconciliation of both net income and the number of common shares used in the computation of (i) basic income per common share - which includes the weighted average number of common shares outstanding without regard to dilutive potential common shares, and (ii) diluted income per common share - which includes the weighted average common shares and dilutive share equivalents. Dilutive share equivalents may include our Series A convertible preferred shares, employee stock options, restricted stock awards and Out-Performance Plan awards.

(Amounts in thousands, except per share amounts)			For the Three Months Ended				For the Nine Months Ended
			September 30,				September 30,
			2016		2015		2016		2015
Numerator:
	Income from continuing operations, net of income
		attributable to noncontrolling interests	$	89,793	$	186,833	$	233,826	$	462,040
	Income from discontinued operations, net of income
		attributable to noncontrolling interests		2,787		32,401		5,781		47,287
	Net income attributable to Vornado			92,580		219,234		239,607		509,327
	Preferred share dividends			(19,047)		(20,364)		(59,774)		(60,213)
	Preferred share issuance costs (Series J redemption)			(7,408)		-		(7,408)		-
	Net income attributable to common shareholders			66,125		198,870		172,425		449,114
	Earnings allocated to unvested participating securities			(13)		(18)		(43)		(56)
	Numerator for basic income per share			66,112		198,852		172,382		449,058
	Impact of assumed conversions:
		Convertible preferred share dividends		-		23		-		69
		Earnings allocated to Out-Performance Plan units		-		-		96		628
	Numerator for diluted income per share		$	66,112	$	198,875	$	172,478	$	449,755

Denominator:
	Denominator for basic income per share – weighted average shares			188,901		188,504		188,778		188,291
	Effect of dilutive securities⁽¹⁾:
		Employee stock options and restricted share awards		1,147		1,032		1,067		1,187
		Convertible preferred shares		-		45		-		46
		Out-Performance Plan units		-		-		241		265
	Denominator for diluted income per share – weighted average
		shares and assumed conversions		190,048		189,581		190,086		189,789

INCOME PER COMMON SHARE – BASIC:
	Income from continuing operations, net		$	0.34	$	0.88	$	0.88	$	2.13
	Income from discontinued operations, net			0.01		0.17		0.03		0.25
	Net income per common share		$	0.35	$	1.05	$	0.91	$	2.38

INCOME PER COMMON SHARE – DILUTED:
	Income from continuing operations, net		$	0.33	$	0.88	$	0.88	$	2.12
	Income from discontinued operations, net			0.02		0.17		0.03		0.25
	Net income per common share		$	0.35	$	1.05	$	0.91	$	2.37


(1)	The effect of dilutive securities for the three months ended September 30, 2016 and 2015 excludes an aggregate of 12,315 and 11,871 weighted average common share equivalents, respectively, and 12,072 and 11,341 weighted average common share equivalents for the nine months ended September 30, 2016 and 2015, respectively, as their effect was anti-dilutive.

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	21. Commitments and Contingencies Insurance We maintain general liability insurance with limits of $300,000,000 per occurrence and per property, and all risk property and rental value insurance with limits of $2.0 billion per occurrence, with sub-limits for certain perils such as flood and earthquake. Our California properties have earthquake insurance with coverage of $180,000,000 per occurrence and in the annual aggregate, subject to a deductible in the amount of 5% of the value of the affected property. We maintain coverage for terrorism acts with limits of $4.0 billion per occurrence and in the aggregate, and $2.0 billion per occurrence and in the aggregate for terrorism involving nuclear, biological, chemical and radiological (“NBCR”) terrorism events, as defined by Terrorism Risk Insurance Program Reauthorization Act of 2015, which expires in December 2020. Penn Plaza Insurance Company, LLC (“PPIC”), our wholly owned consolidated subsidiary, acts as a re-insurer with respect to a portion of all risk property and rental value insurance and a portion of our earthquake insurance coverage, and as a direct insurer for coverage for acts of terrorism including NBCR acts. Coverage for acts of terrorism (excluding NBCR acts) is fully reinsured by third party insurance companies and the Federal government with no exposure to PPIC. For NBCR acts, PPIC is responsible for a deductible of $2,400,000 per occurrence and 16% of the balance of a covered loss and the Federal government is responsible for the remaining 84% of a covered loss. We are ultimately responsible for any loss incurred by PPIC. We continue to monitor the state of the insurance market and the scope and costs of coverage for acts of terrorism. However, we cannot anticipate what coverage will be available on commercially reasonable terms in the future. Our debt instruments, consisting of mortgage loans secured by our properties which are non-recourse to us, senior unsecured notes and revolving credit agreements contain customary covenants requiring us to maintain insurance. Although we believe that we have adequate insurance coverage for purposes of these agreements, we may not be able to obtain an equivalent amount of coverage at reasonable costs in the future. Further, if lenders insist on greater coverage than we are able to obtain, it could adversely affect our ability to finance our properties and expand our portfolio. Other Commitments and Contingencies We are from time to time involved in legal actions arising in the ordinary course of business. In our opinion, after consultation with legal counsel, the outcome of such matters is not expected to have a material adverse effect on our financial position, results of operations or cash flows. Each of our properties has been subjected to varying degrees of environmental assessment at various times. The environmental assessments did not reveal any material environmental contamination. However, there can be no assurance that the identification of new areas of contamination, changes in the extent or known scope of contamination, the discovery of additional sites, or changes in cleanup requirements would not result in significant costs to us. Generally, our mortgage loans are non-recourse to us. However, in certain cases we have provided guarantees or master leased tenant space. These guarantees and master leases terminate either upon the satisfaction of specified circumstances or repayment of the underlying loans. As of September 30, 2016, the aggregate dollar amount of these guarantees and master leases is approximately $811,000,000. At September 30, 2016, $38,882,000 of letters of credit were outstanding under one of our unsecured revolving credit facilities. Our unsecured revolving credit facilities contain financial covenants that require us to maintain minimum interest coverage and maximum debt to market capitalization ratios, and provide for higher interest rates in the event of a decline in our ratings below Baa3/BBB. Our unsecured revolving credit facilities also contain customary conditions precedent to borrowing, including representations and warranties, and also contain customary events of default that could give rise to accelerated repayment, including such items as failure to pay interest or principal. As of September 30, 2016, we expect to fund additional capital to certain of our partially owned entities aggregating approximately $66,000,000. As of September 30, 2016, we have construction commitments aggregating approximately $687,000,000.

Segment Information

9 Months Ended

Sep. 30, 2016

Segment Information [Abstract]

Segment Information

22. Segment Information

Below is a summary of net income and a reconciliation of net income to EBITDA⁽¹⁾ by segment for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)		For the Three Months Ended September 30, 2016
			Total		New York			Washington, DC			Other
Total revenues			$	633,197	$	432,869		$	134,446		$	65,882
Total expenses				444,044		280,689			90,756			72,599
Operating income (loss)				189,153		152,180			43,690			(6,717)
Income (loss) from partially owned entities				4,127		(579)			(452)			5,158
Income from real estate fund investments				1,077		-			-			1,077
Interest and other investment income, net				6,508		1,355			49			5,104
Interest and debt expense				(98,365)		(51,212)			(18,644)			(28,509)
Income (loss) before income taxes				102,500		101,744			24,643			(23,887)
Income tax expense				(4,865)		(2,356)			(302)			(2,207)
Income (loss) from continuing operations				97,635		99,388			24,341			(26,094)
Income from discontinued operations				2,969		-			-			2,969
Net income (loss)				100,604		99,388			24,341			(23,125)
Less net income attributable to noncontrolling interests				(8,024)		(2,985)			-			(5,039)
Net income (loss) attributable to Vornado				92,580		96,403			24,341			(28,164)
Net income attributable to noncontrolling interests in the
	Operating Partnership			4,366		-			-			4,366
Interest and debt expense⁽²⁾				122,979		66,314			20,991			35,674
Depreciation and amortization⁽²⁾				172,980		111,731			37,123			24,126
Income tax expense⁽²⁾				5,102		2,445			310			2,347
EBITDA⁽¹⁾			$	398,007	$	276,893	⁽³⁾	$	82,765	⁽⁴⁾	$	38,349	⁽⁵⁾

See notes on pages 31 and 32.

(Amounts in thousands)		For the Three Months Ended September 30, 2015
			Total		New York			Washington, DC			Other
Total revenues			$	627,596	$	429,433		$	132,704		$	65,459
Total expenses				436,156		263,805			102,114			70,237
Operating income (loss)				191,440		165,628			30,590			(4,778)
(Loss) income from partially owned entities				(325)		4,010			(1,909)			(2,426)
Income from real estate fund investments				1,665		-			-			1,665
Interest and other investment income, net				3,160		1,888			34			1,238
Interest and debt expense				(95,344)		(50,480)			(16,580)			(28,284)
Net gain on disposition of wholly owned and partially
	owned assets			103,037		-			102,404			633
Income (loss) before income taxes				203,633		121,046			114,539			(31,952)
Income tax expense				(2,856)		(1,147)			(287)			(1,422)
Income (loss) from continuing operations				200,777		119,899			114,252			(33,374)
Income from discontinued operations				34,463		-			-			34,463
Net income				235,240		119,899			114,252			1,089
Less net income attributable to noncontrolling interests				(16,006)		(2,582)			-			(13,424)
Net income (loss) attributable to Vornado				219,234		117,317			114,252			(12,335)
Net income attributable to noncontrolling interests in the
	Operating Partnership			12,704		-			-			12,704
Interest and debt expense⁽²⁾				118,977		64,653			20,010			34,314
Depreciation and amortization⁽²⁾				174,209		99,206			48,132			26,871
Income tax expense ⁽²⁾				3,043		1,214			294			1,535
EBITDA⁽¹⁾			$	528,167	$	282,390	⁽³⁾	$	182,688	⁽⁴⁾	$	63,089	⁽⁵⁾

See notes on pages 31 and 32.

(Amounts in thousands)		For the Nine Months Ended September 30, 2016
			Total		New York			Washington, DC			Other
Total revenues			$	1,867,942	$	1,269,464		$	389,926		$	208,552
Total expenses				1,492,255		818,419			436,427			237,409
Operating income (loss)				375,687		451,045			(46,501)			(28,857)
Income (loss) from partially owned entities				529		(5,143)			(5,453)			11,125
Income from real estate fund investments				28,750		-			-			28,750
Interest and other investment income, net				20,262		3,684			141			16,437
Interest and debt expense				(304,430)		(162,193)			(54,396)			(87,841)
Net gain on disposition of wholly owned and partially
	owned assets			160,225		159,511			-			714
Income (loss) before income taxes				281,023		446,904			(106,209)			(59,672)
Income tax expense				(9,805)		(4,131)			(884)			(4,790)
Income (loss) from continuing operations				271,218		442,773			(107,093)			(64,462)
Income from discontinued operations				6,160		-			-			6,160
Net income (loss)				277,378		442,773			(107,093)			(58,302)
Less net income attributable to noncontrolling interests				(37,771)		(9,811)			-			(27,960)
Net income (loss) attributable to Vornado				239,607		432,962			(107,093)			(86,262)
Net income attributable to noncontrolling interests in the
	Operating Partnership			11,410		-			-			11,410
Interest and debt expense⁽²⁾				376,898		208,683			63,038			105,177
Depreciation and amortization⁽²⁾				521,143		331,448			119,109			70,586
Income tax expense ⁽²⁾				13,067		4,424			2,780			5,863
EBITDA⁽¹⁾			$	1,162,125	$	977,517	⁽³⁾	$	77,834	⁽⁴⁾	$	106,774	⁽⁵⁾

(Amounts in thousands)		For the Nine Months Ended September 30, 2015
		Total		New York			Washington, DC			Other
Total revenues		$	1,850,686	$	1,243,208		$	401,528		$	205,950
Total expenses			1,298,141		766,863			293,772			237,506
Operating income (loss)			552,545		476,345			107,756			(31,556)
(Loss) income from partially owned entities			(8,709)		1,523			(3,583)			(6,649)
Income from real estate fund investments			52,122		-			-			52,122
Interest and other investment income, net			19,618		5,642			60			13,916
Interest and debt expense			(279,110)		(143,004)			(52,223)			(83,883)
Net gain on disposition of wholly owned and partially
	owned assets		104,897		-			102,404			2,493
Income (loss) before income taxes			441,363		340,506			154,414			(53,557)
Income tax benefit (expense)			84,245		(3,185)			(79)			87,509
Income from continuing operations			525,608		337,321			154,335			33,952
Income from discontinued operations			50,278		-			-			50,278
Net income			575,886		337,321			154,335			84,230
Less net income attributable to noncontrolling interests			(66,559)		(6,640)			-			(59,919)
Net income attributable to Vornado			509,327		330,681			154,335			24,311
Net income attributable to noncontrolling interests in the
	Operating Partnership		28,189		-			-			28,189
Interest and debt expense⁽²⁾			348,725		184,377			62,413			101,935
Depreciation and amortization⁽²⁾			493,904		288,897			136,687			68,320
Income tax (benefit) expense⁽²⁾			(85,349)		3,368			(1,856)			(86,861)
EBITDA⁽¹⁾		$	1,294,796	$	807,323	⁽³⁾	$	351,579	⁽⁴⁾	$	135,894	⁽⁵⁾


See notes on the following pages.

Notes to preceding tabular information:

(1)	EBITDA represents "Earnings Before Interest, Taxes, Depreciation and Amortization." We calculate EBITDA on an Operating Partnership basis which is before allocation to noncontrolling interests in the Operating Partnership. We consider EBITDA a non-GAAP financial measure for making decisions and assessing the unlevered performance of our segments as it relates to the total return on assets as opposed to the levered return on equity. As properties are bought and sold based on a multiple of EBITDA, we utilize this measure to make investment decisions as well as to compare the performance of our assets to that of our peers. EBITDA should not be considered a substitute for net income. EBITDA may not be comparable to similarly titled measures employed by other companies.

(2)	Interest and debt expense, depreciation and amortization and income tax expense (benefit) in the reconciliation of net income (loss) to EBITDA includes our share of these items from partially owned entities.

(3)	The elements of "New York" EBITDA are summarized below.

	(Amounts in thousands)			For the Three Months Ended				For the Nine Months Ended
				September 30,				September 30,
				2016		2015		2016		2015
	Office^(a)			$	159,937	$	161,168	$	475,726	$	480,508
	Retail^(b)				95,274		97,604		284,212		265,060
	Residential				6,214		5,495		18,901		16,254
	Alexander's				11,506		10,502		34,880		31,150
	Hotel Pennsylvania				3,962		7,621		4,287		14,351
					276,893		282,390		818,006		807,323
	Net gain on sale of 47% ownership interest
		in 7 West 34th Street			-		-		159,511		-
			Total New York	$	276,893	$	282,390	$	977,517	$	807,323


	(a)	The three and nine months ended September 30, 2015 include $5,151 and $16,954, respectively, of EBITDA from sold properties and other. Excluding these items, EBITDA was $156,017 and $463,554, respectively. The nine months ended September 30, 2016 includes $2,935 of EBITDA from a sold property. Excluding this item, EBITDA was $472,791.
	(b)	The three and nine months ended September 30, 2015 include $524 and $1,597, respectively, of EBITDA from a sold property. Excluding this item, EBITDA was $97,080 and $263,463, respectively. The nine months ended September 30, 2016 includes $185 of EBITDA from a sold property. Excluding this item, EBITDA was $284,027.

(4)	The elements of "Washington, DC" EBITDA are summarized below.

	(Amounts in thousands)			For the Three Months Ended				For the Nine Months Ended
				September 30,				September 30,
				2016		2015		2016		2015
	Office, excluding the Skyline properties ^(a)			$	67,073	$	63,879	$	191,646	$	199,757
	Skyline properties				4,222		5,998		14,177		19,037
	Skyline properties impairment loss				-		-		(160,700)		-
	Net gain on sale of 1750 Pennsylvania Avenue				-		102,404		-		102,404
			Total Office		71,295		172,281		45,123		321,198
	Residential				11,470		10,407		32,711		30,381
			Total Washington, DC	$	82,765	$	182,688	$	77,834	$	351,579


	(a)	The three and nine months ended September 30, 2015 include $1,601 and $5,591, respectively, of EBITDA from a sold property. Excluding this item, EBITDA was $62,278 and $194,166, respectively.

Notes to preceding tabular information - continued:

(5)	The elements of "Other" EBITDA are summarized below.

	(Amounts in thousands)			For the Three Months Ended				For the Nine Months Ended
				September 30,				September 30,
				2016		2015		2016		2015
	Our share of real estate fund investments:
		Income before net realized/unrealized gains and losses		$	2,552	$	2,594	$	6,309	$	6,879
		Net realized/unrealized (losses) gains on investments			(2,118)		(922)		3,333		9,542
		Carried interest			373		(49)		4,020		6,248
	Total				807		1,623		13,662		22,669
	theMART (including trade shows)				21,696		19,044		70,689		62,229
	555 California Street				11,405		13,005		35,137		38,237
	India real estate ventures				836		13		2,585		2,229
	Other investments				19,092		11,009		46,180		31,705
					53,836		44,694		168,253		157,069
	Corporate general and administrative expenses^(a)(b)				(21,519)		(22,341)		(76,364)		(82,043)
	Investment income and other, net^(a)				6,871		5,952		19,317		21,275
	Acquisition and transaction related costs				(3,808)		(1,518)		(11,319)		(7,560)
	UE and residual retail properties discontinued operations^(c)				2,969		2,516		6,173		26,313
	Net gain on sale of Monmouth Mall				-		33,153		-		33,153
	Net gain on sale of residential condominiums				-		633		714		2,493
	Our share of impairment loss on India real estate ventures				-		-		-		(14,806)
			Total Other	$	38,349	$	63,089	$	106,774	$	135,894


	(a)	The amounts in these captions (for this table only) exclude the results of the mark-to-market of our deferred compensation plan of $204 of income and $2,577 of loss for the three months ended September 30, 2016 and 2015, respectively, and $2,625 of income and $327 of loss for the nine months ended September 30, 2016 and 2015, respectively.
	(b)	The nine months ended September 30, 2015 includes a cumulative catch up of $4,542 from the acceleration of recognition of compensation expense related to the modification of the 2012-2014 Out-Performance Plans.
	(c)	The nine months ended September 30, 2015 includes $22,972 of transaction costs related to the spin-off of our strip shopping centers and malls.

22. Segment Information – continued

Subsequent to the issuance of our consolidated financial statements for the quarterly period ended June 30, 2016, we determined to correct our calculation of “Other" EBITDA as previously presented to add back net income attributable to the noncontrolling interest of the Operating Partnership in order to report “Other" EBITDA on an Operating Partnership basis, consistent with the manner that EBITDA is reported for the New York and Washington DC segments. This change results in an increase (decrease) in both “Other” EBITDA and “Total” EBITDA as follows:

(Amounts in thousands)		Total EBITDA						Other EBITDA
				Net income (loss)						Net income (loss)
				attributable to						attributable to
				noncontrolling						noncontrolling
				interests in the						interests in the
				Operating						Operating
		As reported		Partnership		As restated		As reported		Partnership		As restated
For the year ended:
	December 31, 2015	$	1,809,535	$	43,231	$	1,852,766	$	128,246	$	43,231	$	171,477
	December 31, 2014		2,229,471		47,613		2,277,084		454,692		47,613		502,305
	December 31, 2013		1,993,880		24,817		2,018,697		572,975		24,817		597,792

For the three months ended:
	June 30, 2016		546,681		14,531		561,212		27,102		14,531		41,633
	March 31, 2016		210,393		(7,487)		202,906		34,279		(7,487)		26,792
	December 31, 2015		542,928		15,042		557,970		20,541		15,042		35,583
	September 30, 2015		515,463		12,704		528,167		50,385		12,704		63,089
	June 30, 2015		376,681		10,198		386,879		15,059		10,198		25,257
	March 31, 2015		374,463		5,287		379,750		42,261		5,287		47,548

For the six months ended:
	June 30, 2016		757,074		7,044		764,118		61,381		7,044		68,425
	June 30, 2015		751,144		15,485		766,629		57,320		15,485		72,805

For the nine months ended:
	September 30, 2015		1,266,607		28,189		1,294,796		107,705		28,189		135,894

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Name Accounting Standards Codification
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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+ Details

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2016
Subsequent Events [Abstract]
Subsequent Events	23. Subsequent Event On October 31, 2016, our Board of Trustees approved the tax-free spin-off of our Washington, DC business and we entered into a definitive agreement to merge it with the business and certain select assets of The JBG Companies (“JBG”), a Washington, DC real estate company. Steven Roth, our Chairman and Chief Executive Officer, will be Chairman of the Board of Trustees of the new combined company. Mitchell Schear, President of our Washington, DC business, will be a member of management’s Executive Committee and a Trustee of the new combined company. The pro rata distribution to Vornado common shareholders and Vornado Realty L.P. common unitholders is intended to be treated as a tax-free spin-off for U.S. federal income tax purposes. It is expected to be made on a pro rata 1:2 basis. The initial Form 10 registration statement relating to the spin-off is expected to be filed with the SEC in the fourth quarter of 2016, and the distribution and combination are expected to be completed in the second quarter of 2017. The transactions are subject to certain conditions, including the SEC declaring the Form 10 registration statement effective, filing and approval of the new company’s listing application, receipt of regulatory approvals and third party consents by each of Vornado and JBG, and formal declaration of the distribution by our Board of Trustees. The transactions are not subject to a vote by Vornado shareholders. Our Board of Trustees has approved the transaction. JBG’s investors have consented to the transaction. There can be no assurance that this transaction will be completed.

Significant Accounting Policies (Policy)	9 Months Ended
Significant Accounting Policies (Policy)	Sep. 30, 2016
Basis of Presentation [Abstract]
Basis of Presentation [Policy Text Block]	The accompanying consolidated financial statements are unaudited and include the accounts of Vornado and its consolidated subsidiaries, including the Operating Partnership. All inter-company amounts have been eliminated. In our opinion, all adjustments (which include only normal recurring adjustments) necessary to present fairly the financial position, results of operations and changes in cash flows have been made. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted. These condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q of the Securities and Exchange Commission (“SEC”) and should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K, as amended, for the year ended December 31, 2015, as filed with the SEC. We have made estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. The results of operations for the three and nine months ended September 30, 2016 are not necessarily indicative of the operating results for the full year.
Recently Issued Accounting Literature [Policy Text Block]	3. Recently Issued Accounting Literature In May 2014, the Financial Accounting Standards Board (“FASB”) issued an update ("ASU 2014-09") establishing Accounting Standards Codification (“ASC”) Topic 606, Revenue from Contracts with Customers (“ASC 606”). ASU 2014-09 establishes a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most of the existing revenue recognition guidance. ASU 2014-09 requires an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services and also requires certain additional disclosures. In August 2015, the FASB issued an update (“ASU 2015-14”) to ASC 606, Deferral of the Effective Date, which defers the adoption of ASU 2014-09 to interim and annual reporting periods in fiscal years that begin after December 15, 2017. In March 2016, the FASB issued an update (“ASU 2016-08”) to ASC 606, Principal versus Agent Considerations (Reporting Revenue Gross versus Net), which clarifies the implementation guidance on principal versus agent considerations in the new revenue recognition standard pursuant to ASU 2014-09. In April 2016, the FASB issued an update (“ASU 2016-10”) to ASC 606, Identifying Performance Obligations and Licensing, which clarifies guidance related to identifying performance obligations and licensing implementation guidance contained in ASU 2014-09. In May 2016, the FASB issued an update (“ASU 2016-12”) to ASC 606, Narrow-Scope Improvements and Practical Expedients, which amends certain aspects of the new revenue recognition standard pursuant to ASU 2014-09. We are currently evaluating the impact of the adoption of these ASUs on our consolidated financial statements. In June 2014, the FASB issued an update (“ASU 2014-12”) to ASC Topic 718, Compensation – Stock Compensation (“ASC 718”). ASU 2014-12 requires an entity to treat performance targets that can be met after the requisite service period of a share based award has ended, as a performance condition that affects vesting. ASU 2014-12 is effective for interim and annual reporting periods in fiscal years that began after December 15, 2015. The adoption of this update as of January 1, 2016, did not have any impact on our consolidated financial statements. In February 2015, the FASB issued an update (“ASU 2015-02”) Amendments to the Consolidation Analysis to ASC Topic 810, Consolidation. ASU 2015-02 affects reporting entities that are required to evaluate whether they should consolidate certain legal entities. Specifically, the amendments: (i) modify the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIEs") or voting interest entities, (ii) eliminate the presumption that a general partner should consolidate a limited partnership, (iii) affect the consolidation analysis of reporting entities that are involved with VIEs, and (iv) provide a scope exception for certain entities. ASU 2015-02 is effective for interim and annual reporting periods beginning after December 15, 2015. The adoption of this update on January 1, 2016 resulted in the identification of additional VIEs, but did not have an impact on our consolidated financial statements other than additional disclosures (see Note 15 - Variable Interest Entities). In January 2016, the FASB issued an update (“ASU 2016-01”) Recognition and Measurement of Financial Assets and Financial Liabilities to ASC Topic 825, Financial Instruments. ASU 2016-01 amends certain aspects of recognition, measurement, presentation and disclosure of financial instruments, including the requirement to measure certain equity investments at fair value with changes in fair value recognized in net income. ASU 2016-01 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. We are currently evaluating the impact of the adoption of ASU 2016-01 on our consolidated financial statements. In February 2016, the FASB issued (“ASU 2016-02”) Leases, which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. ASU 2016-02 requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase. Lessees are required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months. Leases with a term of 12 months or less will be accounted for similar to existing guidance for operating leases. Lessees will recognize expense based on the effective interest method for finance leases or on a straight-line basis for operating leases. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance. ASU 2016-02 is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. We are currently evaluating the impact of the adoption of ASU 2016-02 on our consolidated financial statements. In March 2016, the FASB issued an update (“ASU 2016-09”) Improvements to Employee Share-Based Payment Accounting to ASC 718. ASU 2016-09 amends several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. We are currently evaluating the impact of the adoption of ASU 2016-09 on our consolidated financial statements. In August 2016, the FASB issued an update (“ASU 2016-15”) Classification of Certain Cash Receipts and Cash Payments to ASC Topic 230, Statement of Cash Flows. ASU 2016-15 clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows to reduce diversity in practice with respect to (i) debt prepayment or debt extinguishment costs, (ii) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, (iii) contingent consideration payments made after a business combination, (iv) proceeds from the settlement of insurance claims, (v) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies, (vi) distributions received from equity method investees, (vii) beneficial interests in securitization transactions, and (viii) separately identifiable cash flows and application of the predominance principle. ASU 2016-15 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017, with early adoption permitted. The adoption of this update is not expected to have a significant impact on our consolidated financial statements.
Real Estate Fund Investments [Policy Text Block]	The Fund is accounted for under ASC 946, Financial Services – Investment Companies (“ASC 946”) and its investments are reported on its balance sheet at fair value, with changes in value each period recognized in earnings. We consolidate the accounts of the Fund into our consolidated financial statements, retaining the fair value basis of accounting. The Co-Investment is also accounted for under ASC 946. We consolidate the accounts of the Co-Investment into our consolidated financial statements, retaining the fair value basis of accounting.
Redeemable Noncontrolling Interests [Policy Text Block]	Redeemable noncontrolling interests on our consolidated balance sheets are comprised primarily of Class A Operating Partnership units held by third parties and 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-1 through G-4 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.
Fair Value Measurement [Policy Text Block]	In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible, as well as consider counterparty credit risk in our assessment of fair value. Considerable judgment is necessary to interpret Level 2 and 3 inputs in determining the fair value of our financial and non-financial assets and liabilities. Accordingly, our fair value estimates, which are made at the end of each reporting period, may be different than the amounts that may ultimately be realized upon sale or disposition of these assets. Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Financial assets and liabilities that are measured at fair value on our consolidated balance sheets consist of (i) marketable securities, (ii) real estate fund investments, (iii) the assets in our deferred compensation plan (for which there is a corresponding liability on our consolidated balance sheet), (iv) mandatorily redeemable instruments (Series G-1 through G-4 convertible preferred units and Series D-13 cumulative redeemable preferred units), and (v) interest rate swaps. Financial Assets and Liabilities not Measured at Fair Value Financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash equivalents (primarily money market funds, which invest in obligations of the United States government), and our secured and unsecured debt. Estimates of the fair value of these instruments are determined by the standard practice of modeling the contractual cash flows required under the instrument and discounting them back to their present value at the appropriate current risk adjusted interest rate, which is provided by a third-party specialist. For floating rate debt, we use forward rates derived from observable market yield curves to project the expected cash flows we would be required to make under the instrument. The fair value of cash equivalents and borrowings under our unsecured revolving credit facilities and unsecured term loan are classified as Level 1. The fair value of our secured and unsecured debt is classified as Level 2.

Real Estate Fund Investments (Tables)

9 Months Ended

Sep. 30, 2016

Real Estate Fund Investments [Abstract]

Schedule Of Income And Loss From The Fund [Table Text Block]

Below is a summary of income from the Fund and the Co-Investment for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)		For the Three Months Ended				For the Nine Months Ended
		September 30,				September 30,
		2016		2015		2016		2015
Net investment income		$	5,841	$	5,116	$	12,237	$	13,716
Net unrealized (losses) gains on held investments			(4,764)		(2,544)		16,091		37,001
Net realized (losses) gains on exited investments			-		(907)		14,676		24,684
Previously recorded unrealized gain on exited investment			-		-		(14,254)		(23,279)
Income from real estate fund investments			1,077		1,665		28,750		52,122
Less income attributable to noncontrolling interests			(270)		(42)		(15,088)		(29,453)
Income from real estate fund investments
	attributable to Vornado ⁽¹⁾	$	807	$	1,623	$	13,662	$	22,669


(1)	Excludes management, leasing and development fees of $804 and $678 for the three months ended September 30, 2016 and 2015, respectively, and $2,499 and $2,015 for the nine months ended September 30, 2016 and 2015, respectively, which are included as a component of "fee and other income" in our consolidated statements of income.

Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2016

Marketable Securities [Abstract]

Marketable Securities [Table Text Block]

Below is a summary of our marketable securities portfolio as of September 30, 2016 and December 31, 2015.

(Amounts in thousands)		As of September 30, 2016						As of December 31, 2015
				GAAP		Unrealized				GAAP		Unrealized
		Fair Value		Cost		Gain		Fair Value		Cost		Gain
Equity securities:
	Lexington Realty Trust	$	190,230	$	72,549	$	117,681	$	147,752	$	72,549	$	75,203
	Other		7,935		4,379		3,556		3,245		-		3,245
		$	198,165	$	76,928	$	121,237	$	150,997	$	72,549	$	78,448

Investments in Partially Owned Entities (Tables)

9 Months Ended

Sep. 30, 2016

Schedule Of Equity Method Investments [Line Items]

Equity Method Investments [Table Text Block]

Below are schedules summarizing our investments in, and income (loss) from, partially owned entities.

(Amounts in thousands)		Percentage
		Ownership at		Balance as of
		September 30, 2016		September 30, 2016		December 31, 2015
Investments:
	Partially owned office buildings⁽¹⁾		Various	$	811,062	$	909,782
	Alexander’s		32.4%		130,485		133,568
	PREIT		8.0%		124,300		133,375
	India real estate ventures		4.1%-36.5%		44,671		48,310
	UE		5.4%		25,817		25,351
	Other investments⁽²⁾		Various		361,590		300,036
				$	1,497,925	$	1,550,422

	7 West 34th Street⁽³⁾		53.0%	$	(41,439)	$	-


(1)	Includes interests in 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue, 512 West 22nd Street and others.
(2)	Includes interests in Independence Plaza, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street, Toys "R" Us, Inc. (which has a carrying amount of zero) and others.
(3)	Our negative basis results from a $43,813 deferred gain from the sale of a 47.0% ownership interest in the property and is included in "other liabilities" on our consolidated balance sheet.

(Amounts in thousands)				Percentage		For the Three Months Ended				For the Nine Months Ended
				Ownership at		September 30,				September 30,
				September 30, 2016		2016		2015		2016		2015
Our Share of Net Income (Loss):
		Alexander's (see page 13 for details):
			Equity in net income		32.4%	$	6,891	$	5,716	$	20,640	$	16,757
			Management, leasing and development fees				1,894		1,828		5,307		5,801
							8,785		7,544		25,947		22,558
		UE (see page 13 for details):
			Equity in net earnings		5.4%		1,949		934		3,896		1,338
			Management fees				209		466		627		1,550
							2,158		1,400		4,523		2,888

		Partially owned office buildings⁽¹⁾			Various		(9,157)		(2,039)		(35,868)		(14,573)

		India real estate ventures			4.1%-36.5%		(917)		(1,704)		(3,537)		(18,380)	⁽²⁾

		PREIT (see page 13 for details):			8.0%		52		(3,481)		(4,763)		(3,845)

		Other investments⁽³⁾			Various		3,206		(2,045)		14,227		2,643

						$	4,127	$	(325)	$	529	$	(8,709)


(1)	Includes interests in 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 7 West 34th Street, 330 Madison Avenue, 512 West 22nd Street and others. We recognized our share of a write-off of a below market lease liability related to a tenant vacating at 650 Madison of $7,364 and $12,751 for the three and nine months ended September 30, 2015, respectively.
(2)	Includes $14,806 for our share of non-cash impairment losses.
(3)	Includes interests in Independence Plaza, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street, Toys "R" Us, Inc. and others.

Dispositions (Tables)

9 Months Ended

Sep. 30, 2016

Dispositions [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

(Amounts in thousands)	Balance as of
	September 30, 2016		December 31, 2015
Assets related to discontinued operations:
Real estate, net	$	2,642	$	29,561
Other assets		2,904		7,459
	$	5,546	$	37,020

Liabilities related to discontinued operations:
Other liabilities	$	3,284	$	12,470

(Amounts in thousands)	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Income from discontinued operations:
Total revenues	$	676	$	2,589	$	2,805	$	24,868
Total expenses		106		1,279		1,254		16,672
		570		1,310		1,551		8,196
Net gains on sale of real estate and a lease position		2,864		33,153		5,074		65,396
Impairment losses		(465)		-		(465)		(256)
UE spin-off transaction related costs		-		-		-		(22,972)
Pretax income from discontinued operations		2,969		34,463		6,160		50,364
Income tax expense		-		-		-		(86)
Income from discontinued operations	$	2,969	$	34,463	$	6,160	$	50,278

(Amounts in thousands)					For the Nine Months Ended
					September 30,
					2016		2015
Cash flows related to discontinued operations:
Cash flows from operating activities					$	850	$	(34,490)
Cash flows from investing activities						2,785		348,697

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=51716988&loc=SL51721533-107759

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Identified Intangible Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2016

Finite-Lived Intangible Assets [Line Items]

Schedule of Identified Intangible Assets and Intangible Liabilities [Table Text Block]

The following summarizes our identified intangible assets (primarily above-market leases) and liabilities (primarily acquired below-market leases) as of September 30, 2016 and December 31, 2015.

(Amounts in thousands)	Balance as of
	September 30, 2016		December 31, 2015
Identified intangible assets:
Gross amount	$	402,614	$	415,261
Accumulated amortization		(201,164)		(187,360)
Net	$	201,450	$	227,901
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	587,157	$	643,488
Accumulated amortization		(310,685)		(325,340)
Net	$	276,472	$	318,148

Below Market Leases Net Of Above Market Leases [Member]

Finite-Lived Intangible Assets [Line Items]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(Amounts in thousands)
2017	$	45,591
2018		44,331
2019		32,168
2020		23,342
2021		18,159

Other Identified Intangible Assets [Member]

Finite-Lived Intangible Assets [Line Items]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Estimated annual amortization of all other identified intangible assets including acquired in-place leases, customer relationships, and third party contracts for each of the five succeeding years commencing January 1, 2017 is as follows:

(Amounts in thousands)
2017	$	24,502
2018		20,251
2019		15,912
2020		12,441
2021		11,209

Tenant Under Ground Leases [Member]

Finite-Lived Intangible Assets [Line Items]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Estimated annual amortization of these below-market leases, net of above-market leases, for each of the five succeeding years commencing January 1, 2017 is as follows:

(Amounts in thousands)
2017	$	1,832
2018		1,832
2019		1,832
2020		1,832
2021		1,832

Debt (Tables)

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

The following is a summary of our debt:

(Amounts in thousands)			Interest Rate at		Balance at
			September 30, 2016		September 30, 2016		December 31, 2015
Mortgages Payable:
	Fixed rate			3.90%	$	6,685,606	$	6,356,634
	Variable rate			2.34%		3,282,893		3,258,204
		Total		3.39%		9,968,499		9,614,838
	Deferred financing costs, net and other					(100,949)		(101,125)
		Total, net			$	9,867,550	$	9,513,713

Unsecured Debt:
	Senior unsecured notes			3.68%	$	850,000	$	850,000
	Deferred financing costs, net and other					(4,777)		(5,841)
		Senior unsecured notes, net				845,223		844,159

	Unsecured term loan			1.67%		375,000		187,500
	Deferred financing costs, net and other					(3,165)		(4,362)
		Unsecured term loan, net				371,835		183,138

	Unsecured revolving credit facilities			1.57%		115,630		550,000

		Total, net			$	1,332,688	$	1,577,297

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Subparagraph (SX 210.4-08.(e),(f))
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

+ Details

Redeemable Noncontrolling Interests (Tables)

9 Months Ended

Sep. 30, 2016

Redeemable Noncontrolling Interests [Abstract]

Summary Of Activity Of Redeemable Noncontrolling Interests [Table Text Block]

Below is a table summarizing the activity of redeemable noncontrolling interests.

(Amounts in thousands)
Balance at December 31, 2014	$	1,337,780
Net income		28,189
Other comprehensive loss		(3,082)
Distributions		(22,502)
Redemption of Class A units for common shares, at redemption value		(46,693)
Adjustments to carry redeemable Class A units at redemption value		(295,713)
Issuance of Class A units		80,000
Issuance of Series D-17 preferred units		4,428
Other, net		31,478
Balance at September 30, 2015	$	1,113,885

Balance at December 31, 2015	$	1,229,221
Net income		11,410
Other comprehensive income		2,326
Distributions		(23,582)
Redemption of Class A units for common shares, at redemption value		(28,126)
Adjustments to carry redeemable Class A units at redemption value		30,260
Other, net		26,814
Balance at September 30, 2016	$	1,248,323

Accumulated Other Comprehensive Income ("AOCI") (Tables)

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (AOCI) [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following tables set forth the changes in accumulated other comprehensive income by component.

(Amounts in thousands)				Securities		Pro rata share of		Interest
				available-		nonconsolidated		rate
		Total		for-sale		subsidiaries' OCI		swaps		Other
For the Three Months Ended September 30, 2016
Balance as of June 30, 2016		$	72,556	$	117,561	$	(9,941)	$	(30,538)	$	(4,526)
	OCI before reclassifications		9,818		3,685		(915)		7,688		(640)
	Amounts reclassified from AOCI		-		-		-		-		-
Net current period OCI			9,818		3,685		(915)		7,688		(640)
Balance as of September 30, 2016		$	82,374	$	121,246	$	(10,856)	$	(22,850)	$	(5,166)

For the Three Months Ended September 30, 2015
Balance as of June 30, 2015		$	50,613	$	87,442	$	(10,026)	$	(23,730)	$	(3,073)
	OCI before reclassifications		(7,020)		(7,064)		(114)		(290)		448
	Amounts reclassified from AOCI		-		-		-		-		-
Net current period OCI			(7,020)		(7,064)		(114)		(290)		448
Balance as of September 30, 2015		$	43,593	$	80,378	$	(10,140)	$	(24,020)	$	(2,625)

For the Nine Months Ended September 30, 2016
Balance as of December 31, 2015		$	46,921	$	78,448	$	(9,319)	$	(19,368)	$	(2,840)
	OCI before reclassifications		35,453		42,798		(1,537)		(3,482)		(2,326)
	Amounts reclassified from AOCI		-		-		-		-		-
Net current period OCI			35,453		42,798		(1,537)		(3,482)		(2,326)
Balance as of September 30, 2016		$	82,374	$	121,246	$	(10,856)	$	(22,850)	$	(5,166)

For the Nine Months Ended September 30, 2015
Balance as of December 31, 2014		$	93,267	$	133,774	$	(8,992)	$	(25,803)	$	(5,712)
	OCI before reclassifications		(49,674)		(53,396)		(1,148)		1,783		3,087
	Amounts reclassified from AOCI		-		-		-		-		-
Net current period OCI			(49,674)		(53,396)		(1,148)		1,783		3,087
Balance as of September 30, 2015		$	43,593	$	80,378	$	(10,140)	$	(24,020)	$	(2,625)

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Schedule of Fair Values of Financial Assets and Liabilities by Levels [Table Text Block]

The tables below aggregate the fair values of these financial assets and liabilities by their levels in the fair value hierarchy as of September 30, 2016 and December 31, 2015, respectively.

(Amounts in thousands)		As of September 30, 2016
		Total		Level 1		Level 2		Level 3
Marketable securities		$	198,165	$	198,165	$	-	$	-
Real estate fund investments			519,386		-		-		519,386
Deferred compensation plan assets (included in other assets)			118,359		61,444		-		56,915
Interest rate swap (included in other assets)			3,064		-		3,064		-
	Total assets	$	838,974	$	259,609	$	3,064	$	576,301

Mandatorily redeemable instruments (included in other liabilities)		$	50,561	$	50,561	$	-	$	-
Interest rate swaps (included in other liabilities)			23,646		-		23,646		-
	Total liabilities	$	74,207	$	50,561	$	23,646	$	-

(Amounts in thousands)		As of December 31, 2015
		Total		Level 1		Level 2		Level 3
Marketable securities		$	150,997	$	150,997	$	-	$	-
Real estate fund investments			574,761		-		-		574,761
Deferred compensation plan assets (included in other assets)			117,475		58,289		-		59,186
	Total assets	$	843,233	$	209,286	$	-	$	633,947

Mandatorily redeemable instruments (included in other liabilities)		$	50,561	$	50,561	$	-	$	-
Interest rate swaps (included in other liabilities)			19,600		-		19,600		-
	Total liabilities	$	70,161	$	50,561	$	19,600	$	-

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments [Table Text Block]

The table below summarizes the carrying amounts and fair value of these financial instruments as of September 30, 2016 and December 31, 2015.

(Amounts in thousands)		As of September 30, 2016					As of December 31, 2015
		Carrying			Fair		Carrying			Fair
		Amount			Value		Amount			Value
Cash equivalents		$	1,003,149		$	1,003,000	$	1,295,980		$	1,296,000
Debt:
	Mortgages payable	$	9,968,499		$	9,371,000	$	9,614,838		$	9,306,000
	Senior unsecured notes		850,000			896,000		850,000			868,000
	Unsecured term loan		375,000			375,000		187,500			188,000
	Unsecured revolving credit facilities		115,630			116,000		550,000			550,000
	Total	$	11,309,129	⁽¹⁾	$	10,758,000	$	11,202,338	⁽¹⁾	$	10,912,000


(1)	Excludes $108,891 and $111,328 of deferred financing costs, net and other as of September 30, 2016 and December 31, 2015, respectively.

Real Estate Fund [Member]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

Significant unobservable quantitative inputs in the table below were utilized in determining the fair value of these real estate fund investments at September 30, 2016 and December 31, 2015.

			Weighted Average
	Range		(based on fair value of investments)
Unobservable Quantitative Input	September 30, 2016	December 31, 2015	September 30, 2016	December 31, 2015
Discount rates	12.0% to 14.9%	12.0% to 14.9%	13.7%	13.6%
Terminal capitalization rates	4.7% to 5.8%	4.8% to 6.1%	5.4%	5.5%

Summary of Changes in Level 3 Plan Assets [Table Text Block]

The table below summarizes the changes in the fair value of real estate fund investments that are classified as Level 3, for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
		2016		2015	2016		2015
Beginning balance	$	524,150	$	565,976	$	574,761	$	513,973
Purchases		-		11		-		95,011
Dispositions / distributions		-		(8,029)		(71,888)		(91,450)
Net unrealized (losses) gains		(4,764)		(2,544)		16,091		37,001
Net realized (losses) gains		-		(907)		422		1,405
Other, net		-		907		-		(526)
Ending balance	$	519,386	$	555,414	$	519,386	$	555,414

Deferred Compensation Plan Assets [Member]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Summary of Changes in Level 3 Plan Assets [Table Text Block]

The table below summarizes the changes in the fair value of deferred compensation plan assets that are classified as Level 3, for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
		2016		2015	2016		2015
Beginning balance	$	60,140	$	67,668	$	59,186	$	63,315
Purchases		1,251		2,153		3,523		8,384
Sales		(3,737)		(171)		(5,888)		(5,264)
Realized and unrealized (losses) gains		(1,055)		(1,466)		(743)		1,256
Other, net		316		24		837		517
Ending balance	$	56,915	$	68,208	$	56,915	$	68,208

Fee and Other Income (Tables)

9 Months Ended

Sep. 30, 2016

Fee And Other Income Tables [Abstract]

Fee and Other Income (Table)

The following table sets forth the details of fee and other income:

(Amounts in thousands)	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
BMS cleaning fees	$	20,820	$	18,563	$	57,760	$	62,937
Management and leasing fees		6,644		4,045		16,047		12,511
Lease termination fees		2,118		1,517		7,722		8,157
Other income		8,192		10,036		23,904		29,393
	$	37,774	$	34,161	$	105,433	$	112,998

Interest and Other Investment Income, Net (Tables)

9 Months Ended

Sep. 30, 2016

Interest and Other Investment Income, Net [Abstract]

Interest And Other Investment Income, Net [Table Text Block]

The following table sets forth the details of interest and other investment income, net:

(Amounts in thousands)		For the Three Months Ended				For the Nine Months Ended
		September 30,				September 30,
		2016		2015		2016		2015
Dividends on marketable securities		$	3,354	$	3,215	$	9,799	$	9,620
Interest on loans receivable			754		1,154		2,250		5,113
Mark-to-market income (loss) of investments in our
	deferred compensation plan⁽¹⁾		204		(2,577)		2,625		(327)
Other, net			2,196		1,368		5,588		5,212
		$	6,508	$	3,160	$	20,262	$	19,618


(1)	This income (loss) is entirely offset by the income (expense) resulting from the mark-to-market of the deferred compensation plan liability, which is included in "general and administrative" expense.

Interest and Debt Expense (Tables)

9 Months Ended

Sep. 30, 2016

Interest and Debt Expense [Abstract]

Interest And Debt Expense [Table Text Block]

The following table sets forth the details of interest and debt expense:

(Amounts in thousands)		For the Three Months Ended				For the Nine Months Ended
		September 30,				September 30,
		2016		2015		2016		2015
Interest expense		$	98,210	$	113,485	$	302,940	$	305,110
Amortization of deferred financing costs			8,539		7,864		26,312		22,817
Capitalized interest and debt expense			(8,384)		(11,005)		(24,822)		(33,817)
Capitalized standby loan commitment termination fee
	(220 Central Park South development project)		-		(15,000)		-		(15,000)
		$	98,365	$	95,344	$	304,430	$	279,110

Income Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Income Per Share [Abstract]

Schedule Of Earnings Per Share Basic And Diluted [Text Block]

(Amounts in thousands, except per share amounts)			For the Three Months Ended				For the Nine Months Ended
			September 30,				September 30,
			2016		2015		2016		2015
Numerator:
	Income from continuing operations, net of income
		attributable to noncontrolling interests	$	89,793	$	186,833	$	233,826	$	462,040
	Income from discontinued operations, net of income
		attributable to noncontrolling interests		2,787		32,401		5,781		47,287
	Net income attributable to Vornado			92,580		219,234		239,607		509,327
	Preferred share dividends			(19,047)		(20,364)		(59,774)		(60,213)
	Preferred share issuance costs (Series J redemption)			(7,408)		-		(7,408)		-
	Net income attributable to common shareholders			66,125		198,870		172,425		449,114
	Earnings allocated to unvested participating securities			(13)		(18)		(43)		(56)
	Numerator for basic income per share			66,112		198,852		172,382		449,058
	Impact of assumed conversions:
		Convertible preferred share dividends		-		23		-		69
		Earnings allocated to Out-Performance Plan units		-		-		96		628
	Numerator for diluted income per share		$	66,112	$	198,875	$	172,478	$	449,755

Denominator:
	Denominator for basic income per share – weighted average shares			188,901		188,504		188,778		188,291
	Effect of dilutive securities⁽¹⁾:
		Employee stock options and restricted share awards		1,147		1,032		1,067		1,187
		Convertible preferred shares		-		45		-		46
		Out-Performance Plan units		-		-		241		265
	Denominator for diluted income per share – weighted average
		shares and assumed conversions		190,048		189,581		190,086		189,789

INCOME PER COMMON SHARE – BASIC:
	Income from continuing operations, net		$	0.34	$	0.88	$	0.88	$	2.13
	Income from discontinued operations, net			0.01		0.17		0.03		0.25
	Net income per common share		$	0.35	$	1.05	$	0.91	$	2.38

INCOME PER COMMON SHARE – DILUTED:
	Income from continuing operations, net		$	0.33	$	0.88	$	0.88	$	2.12
	Income from discontinued operations, net			0.02		0.17		0.03		0.25
	Net income per common share		$	0.35	$	1.05	$	0.91	$	2.37


(1)	The effect of dilutive securities for the three months ended September 30, 2016 and 2015 excludes an aggregate of 12,315 and 11,871 weighted average common share equivalents, respectively, and 12,072 and 11,341 weighted average common share equivalents for the nine months ended September 30, 2016 and 2015, respectively, as their effect was anti-dilutive.

Segment Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Information [Abstract]

Schedule of Segment Information [Table Text Block]

Below is a summary of net income and a reconciliation of net income to EBITDA⁽¹⁾ by segment for the three and nine months ended September 30, 2016 and 2015.

(Amounts in thousands)		For the Three Months Ended September 30, 2016
			Total		New York			Washington, DC			Other
Total revenues			$	633,197	$	432,869		$	134,446		$	65,882
Total expenses				444,044		280,689			90,756			72,599
Operating income (loss)				189,153		152,180			43,690			(6,717)
Income (loss) from partially owned entities				4,127		(579)			(452)			5,158
Income from real estate fund investments				1,077		-			-			1,077
Interest and other investment income, net				6,508		1,355			49			5,104
Interest and debt expense				(98,365)		(51,212)			(18,644)			(28,509)
Income (loss) before income taxes				102,500		101,744			24,643			(23,887)
Income tax expense				(4,865)		(2,356)			(302)			(2,207)
Income (loss) from continuing operations				97,635		99,388			24,341			(26,094)
Income from discontinued operations				2,969		-			-			2,969
Net income (loss)				100,604		99,388			24,341			(23,125)
Less net income attributable to noncontrolling interests				(8,024)		(2,985)			-			(5,039)
Net income (loss) attributable to Vornado				92,580		96,403			24,341			(28,164)
Net income attributable to noncontrolling interests in the
	Operating Partnership			4,366		-			-			4,366
Interest and debt expense⁽²⁾				122,979		66,314			20,991			35,674
Depreciation and amortization⁽²⁾				172,980		111,731			37,123			24,126
Income tax expense⁽²⁾				5,102		2,445			310			2,347
EBITDA⁽¹⁾			$	398,007	$	276,893	⁽³⁾	$	82,765	⁽⁴⁾	$	38,349	⁽⁵⁾

See notes on pages 31 and 32.

(Amounts in thousands)		For the Three Months Ended September 30, 2015
			Total		New York			Washington, DC			Other
Total revenues			$	627,596	$	429,433		$	132,704		$	65,459
Total expenses				436,156		263,805			102,114			70,237
Operating income (loss)				191,440		165,628			30,590			(4,778)
(Loss) income from partially owned entities				(325)		4,010			(1,909)			(2,426)
Income from real estate fund investments				1,665		-			-			1,665
Interest and other investment income, net				3,160		1,888			34			1,238
Interest and debt expense				(95,344)		(50,480)			(16,580)			(28,284)
Net gain on disposition of wholly owned and partially
	owned assets			103,037		-			102,404			633
Income (loss) before income taxes				203,633		121,046			114,539			(31,952)
Income tax expense				(2,856)		(1,147)			(287)			(1,422)
Income (loss) from continuing operations				200,777		119,899			114,252			(33,374)
Income from discontinued operations				34,463		-			-			34,463
Net income				235,240		119,899			114,252			1,089
Less net income attributable to noncontrolling interests				(16,006)		(2,582)			-			(13,424)
Net income (loss) attributable to Vornado				219,234		117,317			114,252			(12,335)
Net income attributable to noncontrolling interests in the
	Operating Partnership			12,704		-			-			12,704
Interest and debt expense⁽²⁾				118,977		64,653			20,010			34,314
Depreciation and amortization⁽²⁾				174,209		99,206			48,132			26,871
Income tax expense ⁽²⁾				3,043		1,214			294			1,535
EBITDA⁽¹⁾			$	528,167	$	282,390	⁽³⁾	$	182,688	⁽⁴⁾	$	63,089	⁽⁵⁾

See notes on pages 31 and 32.

(Amounts in thousands)		For the Nine Months Ended September 30, 2016
			Total		New York			Washington, DC			Other
Total revenues			$	1,867,942	$	1,269,464		$	389,926		$	208,552
Total expenses				1,492,255		818,419			436,427			237,409
Operating income (loss)				375,687		451,045			(46,501)			(28,857)
Income (loss) from partially owned entities				529		(5,143)			(5,453)			11,125
Income from real estate fund investments				28,750		-			-			28,750
Interest and other investment income, net				20,262		3,684			141			16,437
Interest and debt expense				(304,430)		(162,193)			(54,396)			(87,841)
Net gain on disposition of wholly owned and partially
	owned assets			160,225		159,511			-			714
Income (loss) before income taxes				281,023		446,904			(106,209)			(59,672)
Income tax expense				(9,805)		(4,131)			(884)			(4,790)
Income (loss) from continuing operations				271,218		442,773			(107,093)			(64,462)
Income from discontinued operations				6,160		-			-			6,160
Net income (loss)				277,378		442,773			(107,093)			(58,302)
Less net income attributable to noncontrolling interests				(37,771)		(9,811)			-			(27,960)
Net income (loss) attributable to Vornado				239,607		432,962			(107,093)			(86,262)
Net income attributable to noncontrolling interests in the
	Operating Partnership			11,410		-			-			11,410
Interest and debt expense⁽²⁾				376,898		208,683			63,038			105,177
Depreciation and amortization⁽²⁾				521,143		331,448			119,109			70,586
Income tax expense ⁽²⁾				13,067		4,424			2,780			5,863
EBITDA⁽¹⁾			$	1,162,125	$	977,517	⁽³⁾	$	77,834	⁽⁴⁾	$	106,774	⁽⁵⁾

(Amounts in thousands)		For the Nine Months Ended September 30, 2015
		Total		New York			Washington, DC			Other
Total revenues		$	1,850,686	$	1,243,208		$	401,528		$	205,950
Total expenses			1,298,141		766,863			293,772			237,506
Operating income (loss)			552,545		476,345			107,756			(31,556)
(Loss) income from partially owned entities			(8,709)		1,523			(3,583)			(6,649)
Income from real estate fund investments			52,122		-			-			52,122
Interest and other investment income, net			19,618		5,642			60			13,916
Interest and debt expense			(279,110)		(143,004)			(52,223)			(83,883)
Net gain on disposition of wholly owned and partially
	owned assets		104,897		-			102,404			2,493
Income (loss) before income taxes			441,363		340,506			154,414			(53,557)
Income tax benefit (expense)			84,245		(3,185)			(79)			87,509
Income from continuing operations			525,608		337,321			154,335			33,952
Income from discontinued operations			50,278		-			-			50,278
Net income			575,886		337,321			154,335			84,230
Less net income attributable to noncontrolling interests			(66,559)		(6,640)			-			(59,919)
Net income attributable to Vornado			509,327		330,681			154,335			24,311
Net income attributable to noncontrolling interests in the
	Operating Partnership		28,189		-			-			28,189
Interest and debt expense⁽²⁾			348,725		184,377			62,413			101,935
Depreciation and amortization⁽²⁾			493,904		288,897			136,687			68,320
Income tax (benefit) expense⁽²⁾			(85,349)		3,368			(1,856)			(86,861)
EBITDA⁽¹⁾		$	1,294,796	$	807,323	⁽³⁾	$	351,579	⁽⁴⁾	$	135,894	⁽⁵⁾


See notes on the following pages.

Notes to preceding tabular information:

(1)	EBITDA represents "Earnings Before Interest, Taxes, Depreciation and Amortization." We calculate EBITDA on an Operating Partnership basis which is before allocation to noncontrolling interests in the Operating Partnership. We consider EBITDA a non-GAAP financial measure for making decisions and assessing the unlevered performance of our segments as it relates to the total return on assets as opposed to the levered return on equity. As properties are bought and sold based on a multiple of EBITDA, we utilize this measure to make investment decisions as well as to compare the performance of our assets to that of our peers. EBITDA should not be considered a substitute for net income. EBITDA may not be comparable to similarly titled measures employed by other companies.

(2)	Interest and debt expense, depreciation and amortization and income tax expense (benefit) in the reconciliation of net income (loss) to EBITDA includes our share of these items from partially owned entities.

(3)	The elements of "New York" EBITDA are summarized below.

	(Amounts in thousands)			For the Three Months Ended				For the Nine Months Ended
				September 30,				September 30,
				2016		2015		2016		2015
	Office^(a)			$	159,937	$	161,168	$	475,726	$	480,508
	Retail^(b)				95,274		97,604		284,212		265,060
	Residential				6,214		5,495		18,901		16,254
	Alexander's				11,506		10,502		34,880		31,150
	Hotel Pennsylvania				3,962		7,621		4,287		14,351
					276,893		282,390		818,006		807,323
	Net gain on sale of 47% ownership interest
		in 7 West 34th Street			-		-		159,511		-
			Total New York	$	276,893	$	282,390	$	977,517	$	807,323


	(a)	The three and nine months ended September 30, 2015 include $5,151 and $16,954, respectively, of EBITDA from sold properties and other. Excluding these items, EBITDA was $156,017 and $463,554, respectively. The nine months ended September 30, 2016 includes $2,935 of EBITDA from a sold property. Excluding this item, EBITDA was $472,791.
	(b)	The three and nine months ended September 30, 2015 include $524 and $1,597, respectively, of EBITDA from a sold property. Excluding this item, EBITDA was $97,080 and $263,463, respectively. The nine months ended September 30, 2016 includes $185 of EBITDA from a sold property. Excluding this item, EBITDA was $284,027.

(4)	The elements of "Washington, DC" EBITDA are summarized below.

	(Amounts in thousands)			For the Three Months Ended				For the Nine Months Ended
				September 30,				September 30,
				2016		2015		2016		2015
	Office, excluding the Skyline properties ^(a)			$	67,073	$	63,879	$	191,646	$	199,757
	Skyline properties				4,222		5,998		14,177		19,037
	Skyline properties impairment loss				-		-		(160,700)		-
	Net gain on sale of 1750 Pennsylvania Avenue				-		102,404		-		102,404
			Total Office		71,295		172,281		45,123		321,198
	Residential				11,470		10,407		32,711		30,381
			Total Washington, DC	$	82,765	$	182,688	$	77,834	$	351,579


	(a)	The three and nine months ended September 30, 2015 include $1,601 and $5,591, respectively, of EBITDA from a sold property. Excluding this item, EBITDA was $62,278 and $194,166, respectively.

Details of Other EBITDA [Table Text Block]

Notes to preceding tabular information - continued:

(5)	The elements of "Other" EBITDA are summarized below.

	(Amounts in thousands)			For the Three Months Ended				For the Nine Months Ended
				September 30,				September 30,
				2016		2015		2016		2015
	Our share of real estate fund investments:
		Income before net realized/unrealized gains and losses		$	2,552	$	2,594	$	6,309	$	6,879
		Net realized/unrealized (losses) gains on investments			(2,118)		(922)		3,333		9,542
		Carried interest			373		(49)		4,020		6,248
	Total				807		1,623		13,662		22,669
	theMART (including trade shows)				21,696		19,044		70,689		62,229
	555 California Street				11,405		13,005		35,137		38,237
	India real estate ventures				836		13		2,585		2,229
	Other investments				19,092		11,009		46,180		31,705
					53,836		44,694		168,253		157,069
	Corporate general and administrative expenses^(a)(b)				(21,519)		(22,341)		(76,364)		(82,043)
	Investment income and other, net^(a)				6,871		5,952		19,317		21,275
	Acquisition and transaction related costs				(3,808)		(1,518)		(11,319)		(7,560)
	UE and residual retail properties discontinued operations^(c)				2,969		2,516		6,173		26,313
	Net gain on sale of Monmouth Mall				-		33,153		-		33,153
	Net gain on sale of residential condominiums				-		633		714		2,493
	Our share of impairment loss on India real estate ventures				-		-		-		(14,806)
			Total Other	$	38,349	$	63,089	$	106,774	$	135,894


	(a)	The amounts in these captions (for this table only) exclude the results of the mark-to-market of our deferred compensation plan of $204 of income and $2,577 of loss for the three months ended September 30, 2016 and 2015, respectively, and $2,625 of income and $327 of loss for the nine months ended September 30, 2016 and 2015, respectively.
	(b)	The nine months ended September 30, 2015 includes a cumulative catch up of $4,542 from the acceleration of recognition of compensation expense related to the modification of the 2012-2014 Out-Performance Plans.
	(c)	The nine months ended September 30, 2015 includes $22,972 of transaction costs related to the spin-off of our strip shopping centers and malls.

Revision of our calculation of Other segment EBITDA

(Amounts in thousands)		Total EBITDA						Other EBITDA
				Net income (loss)						Net income (loss)
				attributable to						attributable to
				noncontrolling						noncontrolling
				interests in the						interests in the
				Operating						Operating
		As reported		Partnership		As restated		As reported		Partnership		As restated
For the year ended:
	December 31, 2015	$	1,809,535	$	43,231	$	1,852,766	$	128,246	$	43,231	$	171,477
	December 31, 2014		2,229,471		47,613		2,277,084		454,692		47,613		502,305
	December 31, 2013		1,993,880		24,817		2,018,697		572,975		24,817		597,792

For the three months ended:
	June 30, 2016		546,681		14,531		561,212		27,102		14,531		41,633
	March 31, 2016		210,393		(7,487)		202,906		34,279		(7,487)		26,792
	December 31, 2015		542,928		15,042		557,970		20,541		15,042		35,583
	September 30, 2015		515,463		12,704		528,167		50,385		12,704		63,089
	June 30, 2015		376,681		10,198		386,879		15,059		10,198		25,257
	March 31, 2015		374,463		5,287		379,750		42,261		5,287		47,548

For the six months ended:
	June 30, 2016		757,074		7,044		764,118		61,381		7,044		68,425
	June 30, 2015		751,144		15,485		766,629		57,320		15,485		72,805

For the nine months ended:
	September 30, 2015		1,266,607		28,189		1,294,796		107,705		28,189		135,894

Organization (Details)	9 Months Ended
Organization (Details)	Sep. 30, 2016
Real Estate Properties [Line Items]
Common limited partnership interest in the Operating Partnership	93.70%

Acquisitions (Details) $ in Thousands	May 20, 2016 USD ($) ft² Extensions	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Mortgages payable		$ 9,867,550	$ 9,513,713
Houston Street \| Office and retail building \| Joint Venture
Business Acquisition [Line Items]
Business Acquisition Cost Of Acquired Entity	$ 19,650
Equity method ownership percentage	50.00%
Square Footage Of Real Estate Property \| ft²	33,000
Estimated Development Cost	$ 104,000
Mortgages payable	$ 65,000	$ 22,500
Debt Instrument Maturity	May 2019
Number Of Extensions Available \| Extensions	2
Length Of Extension Available	1 year
Houston Street \| Office and retail building \| Joint Venture \| London Interbank Offered Rate (LIBOR)
Business Acquisition [Line Items]
Spread Over LIBOR (in percentage)	3.00%
Interest Rate, End of Period (in percentage)		3.52%

Real Estate Fund Investments (Narratives) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) Investments	Dec. 31, 2015 USD ($)
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)	$ 519,386	$ 574,761
Co Venture [Member] \| Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Equity method ownership percentage	24.70%
Real Estate Fund [Member]
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)	$ 519,386
Term of the Fund, years	8 years
Investment period for commitments of the Fund, years	3 years
Number Of Investments Held By Fund \| Investments	6
Excess of fair value over cost	$ 210,451
Unfunded Commitments Of Real Estate Investments	117,907
Vornado Realty Trust [Member]
Investment Holdings [Line Items]
Unfunded Commitments Of Real Estate Investments	$ 34,422

Real Estate Fund Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Details Of Income From Real Estate Funds [Abstract]
Income from real estate fund investments	$ 1,077	$ 1,665	$ 28,750	$ 52,122
Less income attributable to noncontrolling interests	(3,658)	(3,302)	(26,361)	(38,370)
Fee And Other Income	37,774	34,161	105,433	112,998
Real estate fund investments
Details Of Income From Real Estate Funds [Abstract]
Net investment income	5,841	5,116	12,237	13,716
Net unrealized (losses) gains on held investments	(4,764)	(2,544)	16,091	37,001
Net realized (losses) gains on exited investments	0	(907)	14,676	24,684
Previously recorded unrealized gain on exited investment	0	0	(14,254)	(23,279)
Income from real estate fund investments	1,077	1,665	28,750	52,122
Less income attributable to noncontrolling interests	(270)	(42)	(15,088)	(29,453)
Income from real estate fund investments attributable to Vornado	807	1,623	13,662	22,669
Fee And Other Income	$ 804	$ 678	$ 2,499	$ 2,015

Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	$ 198,165	$ 150,997
Available-for-sale Equity Securities, Amortized Cost Basis	76,928	72,549
Available-for-sale Securities, Gross Unrealized Gain	121,237	78,448
Lexington Realty Trust [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	190,230	147,752
Available-for-sale Equity Securities, Amortized Cost Basis	72,549	72,549
Available-for-sale Securities, Gross Unrealized Gain	117,681	75,203
Other Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	7,935	3,245
Available-for-sale Equity Securities, Amortized Cost Basis	4,379	0
Available-for-sale Securities, Gross Unrealized Gain	$ 3,556	$ 3,245

Investments in Partially Owned Entities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	May 27, 2016	Dec. 31, 2015
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entitiies	$ 1,497,925		$ 1,497,925			$ 1,550,422
Our share of Net Income (Loss)	4,127	$ (325)	529	$ (8,709)
Other liabilities	457,928		457,928			426,965
650 Madison Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Write off of below market lease liability	$ 7,364		$ 12,751
7 West 34th Street
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	53.00%		53.00%
Carrying amount of investments in partially owned entitiies	$ (41,439)		$ (41,439)			0
Deferred gain	$ 43,813		$ 43,813
Sale of ownership (percent)	47.00%		47.00%
7 West 34th Street \| Joint Venture [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage					53.00%
Deferred gain					$ 43,813
Alexanders Inc [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	32.40%		32.40%
Carrying amount of investments in partially owned entitiies	$ 130,485		$ 130,485			133,568
Equity in net income or earnings	6,891	5,716	20,640	16,757
Management, leasing and development fees	1,894	1,828	5,307	5,801
Our share of Net Income (Loss)	8,785	7,544	25,947	22,558
India real estate ventures [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entitiies	44,671		44,671			48,310
Our share of Net Income (Loss)	$ (917)	(1,704)	$ (3,537)	(18,380)
Non-cash impairment losses				14,806
India real estate ventures [Member] \| Minimum
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	4.10%		4.10%
India real estate ventures [Member] \| Maximum
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	36.50%		36.50%
Partially owned office buildings [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entitiies	$ 811,062		$ 811,062			909,782
Our share of Net Income (Loss)	$ (9,157)	(2,039)	$ (35,868)	(14,573)
Urban Edge Properties [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	5.40%		5.40%
Carrying amount of investments in partially owned entitiies	$ 25,817		$ 25,817			25,351
Equity in net income or earnings	1,949	934	3,896	1,338
Management, leasing and development fees	209	466	627	1,550
Our share of Net Income (Loss)	$ 2,158	1,400	$ 4,523	2,888
PREIT Associates
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	8.00%		8.00%
Carrying amount of investments in partially owned entitiies	$ 124,300		$ 124,300			133,375
Our share of Net Income (Loss)	52	(3,481)	(4,763)	(3,845)
Other equity method investments [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entitiies	361,590		361,590			$ 300,036
Our share of Net Income (Loss)	$ 3,206	$ (2,045)	$ 14,227	$ 2,643

Investments in Partially Owned Entities (Alexander's Inc.) (Details) - Alexanders Inc $ / shares in Units, $ in Thousands	Sep. 30, 2016 USD ($) $ / shares shares
Equity Method Investments And Income From Equity Method Investments [Abstract]
Ownership common shares, investee (in shares) \| shares	1,654,068
Equity method ownership percentage	32.40%
Closing share price (in dollars per share) \| $ / shares	$ 419.6
Equity Method Investment Market Value	$ 694,047
Excess of investee's fair value over carrying amount	563,562
Excess of investee's carrying amount over equity in net assets	$ 39,778

Investments in Partially Owned Entities (Urban Edge Properties and PREIT Associates L.P.) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares
PREIT Associates
Schedule Of Equity Method Investments [Line Items]
Operating Partnership Units Owned \| shares	6,250,000
Equity method ownership percentage	8.00%
Closing share price (in dollars per share) \| $ / shares	$ 23.03
Equity Method Investment fair Value	$ 143,938
Excess of investee's fair value over carrying amount	19,638
Excess of investee's carrying amount over equity in net assets	$ 66,596
Urban Edge Properties
Schedule Of Equity Method Investments [Line Items]
Operating Partnership Units Owned \| shares	5,717,184
Equity method ownership percentage	5.40%
Closing share price (in dollars per share) \| $ / shares	$ 28.14
Equity Method Investment fair Value	$ 160,882
Excess of investee's fair value over carrying amount	$ 135,065

Investments in Partially Owned Entities (One Park, NY Mezzanine Loan) (Details) ft² in Thousands, $ in Thousands			9 Months Ended
	Mar. 17, 2016 USD ($) Extensions	Mar. 07, 2016 USD ($) ft²	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable			$ 9,867,550	$ 9,513,713
One Park Avenue \| Joint Venture
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage		55.00%
Square Footage Of Real Estate Property \| ft²		947
One Park Avenue \| Joint Venture \| Mortgage loan at 2.28% Matures March 2021
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable		$ 300,000
Debt Instrument Maturity			March 2021
Spread Over LIBOR (in percentage)		1.75%
Interest Rate, End of Period (in percentage)			2.28%
One Park Avenue \| Joint Venture \| Mortgage loan at 4.995% Matures March 2016
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable		$ 250,000
Debt Instrument Maturity		March 2016
Interest Rate, End of Period (in percentage)		4.995%
Mezzanine Loan New York \| Joint Venture
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	33.30%
Mezzanine Loan New York \| Joint Venture \| Mortgage loan at 9.38% Matures November 2016
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable	$ 146,004
Debt Instrument Maturity	November 2016
Number Of Extensions Available \| Extensions	2
Length Of Extension Available	3 months
Spread Over LIBOR (in percentage)	8.875%
Interest Rate, End of Period (in percentage)			9.38%
Mezzanine Loan New York \| Joint Venture \| London Interbank Offered Rate (LIBOR)
Schedule Of Equity Method Investments [Line Items]
Remaining committment			$ 3,996
Our share of remaining commitment			1,332
Subordinated Debt			$ 350,000

Investments in Partially Owned Entities (Warner Building,280 Park Avenue,7West 34th Street,West93rdStreet) (Details) ft² in Thousands, $ in Thousands						3 Months Ended			9 Months Ended
	Aug. 03, 2016 USD ($) Extensions	May 27, 2016 USD ($) $ / ft²	May 16, 2016 USD ($) ft²	May 11, 2016 USD ($) ft² Extensions	May 06, 2016 USD ($) ft²	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable						$ 9,867,550			$ 9,867,550		$ 9,513,713
Net gains on sale of real estate and a lease position									5,074	$ 65,396
Gain on sale, recognized						$ 0		$ 103,037	$ 160,225	$ 104,897
The Warner Building \| Joint Venture
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage					55.00%
Square Footage Of Real Estate Property \| ft²					621
The Warner Building \| Joint Venture \| Mortgage Loan at 3.65% matures June 2023
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable					$ 273,000
Interest Rate, End of Period (in percentage)					3.65%
Debt Instrument Maturity					Jun 2023
Fixed interest rate, duration					2 years
Debt amortization, duration					30 years
The Warner Building \| Joint Venture \| Mortgage Loan at 6.26% matures May 2016
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable					$ 293,000
Interest Rate, End of Period (in percentage)					6.26%
Debt Instrument Maturity					May 2016
280 Park Avenue \| Joint Venture
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage				50.00%
Square Footage Of Real Estate Property \| ft²				1,250
280 Park Avenue \| Joint Venture \| Mortgage Loan at 2.51% matures 2019
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable				$ 900,000
Interest Rate, End of Period (in percentage)						2.51%			2.51%
Spread Over LIBOR (in percentage)				2.00%
Number Of Extensions Available \| Extensions				4
Length Of Extension Available				1 year
Term of loan				3 years
280 Park Avenue \| Joint Venture \| Mortgage Loan at 6.35% matures June 2016
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable				$ 721,000
Interest Rate, End of Period (in percentage)				6.35%
Debt Instrument Maturity				Jun 2016
7 West 34th Street
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage						53.00%			53.00%
Deferred gain						$ 43,813			$ 43,813
7 West 34th Street \| Joint Venture
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage		53.00%
Square Footage Of Real Estate Property \| ft²			477
Ownership sold, percentage		47.00%
Value of property		$ 561,000
Value of property, per square foot \| $ / ft²		1,176
Net proceeds from sale		$ 127,382
Net gains on sale of real estate and a lease position		203,324
Gain on sale, recognized							$ 159,511
Deferred gain		43,813
Net gain, Total		$ 90,017
7 West 34th Street \| Joint Venture \| Mortgage Loan at 3.65% matures June 2026
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable			$ 300,000
Interest Rate, End of Period (in percentage)			3.65%
Term of loan			10 years
Debt Instrument Maturity			June 2026
50-70 West 93rd Street \| Joint Venture
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	49.90%
Number Of Extensions Available \| Extensions	2
50-70 West 93rd Street \| Joint Venture \| Previous First Mortgage
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable	$ 44,980
Spread Over LIBOR (in percentage)	1.90%
50-70 West 93rd Street \| Joint Venture \| Previous Second Mortgage matures in September 2016
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable	$ 18,481
Spread Over LIBOR (in percentage)	1.65%
Debt Instrument Maturity	September 2016
50-70 West 93rd Street \| Joint Venture \| Mortgage Loan at 2.22%
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable	$ 80,000
Interest Rate, End of Period (in percentage)						2.22%			2.22%
Spread Over LIBOR (in percentage)	1.70%
Length Of Extension Available	1 year
Term of loan	3 years

Dispositions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Dispositions (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Dispositions [Abstract]
Real Estate, Net	$ 2,642		$ 2,642		$ 29,561
Other Assets	2,904		2,904		7,459
Assets related to discontinued operations	5,546		5,546		37,020
Liabilities related to discontinued operations	3,284		3,284		$ 12,470
Income from discontinued operations:
Total revenues	676	$ 2,589	2,805	$ 24,868
Total expenses	106	1,279	1,254	16,672
Income from discontinued operations before gain on sale of real estate and a lease position	570	1,310	1,551	8,196
Net gains on sale of real estate and a lease position	2,864	33,153	5,074	65,396
Impairment losses	(465)	0	(465)	(256)
UE spin-off transaction related costs	0	0	0	(22,972)
Pretax income from discontinued operations	2,969	34,463	6,160	50,364
Income tax expense	0	0	0	(86)
Income from discontinued operations	$ 2,969	$ 34,463	6,160	50,278
Cash flows related to discontinued Operations:
Cash flows from operating activities			850	(34,490)
Cash flows from investing activities			$ 2,785	$ 348,697

Identified Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross amount	$ 402,614		$ 402,614		$ 415,261
Accumulated amortization	(201,164)		(201,164)		(187,360)
Net	201,450		201,450		227,901
Gross amount	587,157		587,157		643,488
Accumulated amortization	(310,685)		(310,685)		(325,340)
Net	276,472		276,472		$ 318,148
Below Market Leases Net Of Above Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	11,868	$ 19,786	41,676	$ 45,614
2017	45,591		45,591
2018	44,331		44,331
2019	32,168		32,168
2020	23,342		23,342
2021	18,159		18,159
Other Identified Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	6,918	12,908	22,777	24,402
2017	24,502		24,502
2018	20,251		20,251
2019	15,912		15,912
2020	12,441		12,441
2021	11,209		11,209
Tenant Under Ground Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	458	$ 458	1,374	$ 1,374
2017	1,832		1,832
2018	1,832		1,832
2019	1,832		1,832
2020	1,832		1,832
2021	$ 1,832		$ 1,832

Debt (Narratives) (Details) $ in Thousands			3 Months Ended		9 Months Ended
Debt (Narratives) (Details) $ in Thousands	Sep. 06, 2016 USD ($) ft²	Feb. 08, 2016 USD ($) ft²	Sep. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Mar. 15, 2016 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Net gains on sale of real estate and a lease position					$ 5,074	$ 65,396
Mortgages payable			$ 9,867,550		9,867,550			$ 9,513,713
Net proceeds from borrowings					2,000,604	2,876,460
Real estate impairment losses					$ 161,165	$ 256
Skyline Properties
Debt Instrument [Line Items]
Capitalization rate					8.00%
Discount rates					8.20%
Weighted Average interest rate			4.51%	2.97%	4.51%
Real estate impairment losses				$ 160,700
Secured Debt \| 770 Broadway
Debt Instrument [Line Items]
Square Footage Of Real Estate Property \| ft²		1,158,000
Net proceeds from borrowings		$ 330,000
Secured Debt \| 770 Broadway \| Fixed Rate \| Mortgage Loan 2.28%
Debt Instrument [Line Items]
Notes And Loans Payable Refinanced Amount (in US Dollars)		$ 700,000
Debt Term		5 years
Secured Debt \| 770 Broadway \| Fixed Rate \| Mortgage Loan 5.65% due March 2016
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)		5.65%
Debt Instrument Maturity		March 2016
Mortgages payable		$ 353,000
Secured Debt \| 770 Broadway \| Fixed Rate \| Interest rate Swaps
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)		2.56%
Debt Term		4 years 6 months
Secured Debt \| 770 Broadway \| London Interbank Offered Rate (LIBOR) \| Mortgage Loan 2.28%
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)			2.28%		2.28%
Spread Over LIBOR (in percentage)		1.75%
Secured Debt \| Skyline Properties
Debt Instrument [Line Items]
Accrued default interest expense			$ 2,632		$ 5,343
Secured Debt \| Skyline Properties \| Mortgage Special Servicer [Member]
Debt Instrument [Line Items]
Mortgages payable							$ 678,000
Secured Debt \| MART
Debt Instrument [Line Items]
Square Footage Of Real Estate Property \| ft²	3,644,000
Net proceeds from borrowings	$ 124,000
Secured Debt \| MART \| Fixed Rate \| Mortgage Loan 2.70%
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)	2.70%
Notes And Loans Payable Refinanced Amount (in US Dollars)	$ 675,000
Debt Term	5 years
Secured Debt \| MART \| Fixed Rate \| Mortgage Loan 5.57% due December 2016
Debt Instrument [Line Items]
Interest Rate, End of Period (in percentage)	5.57%
Debt Instrument Maturity	December 2016
Mortgages payable	$ 550,000

Debt (Summary of Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Deferred financing costs, net and other	$ (108,891)	$ (111,328)
Mortgages payable, net	9,867,550	9,513,713
Senior unsecured notes, net	845,223	844,159
Unsecured term loan, net	371,835	183,138
Unsecured revolving credit facilities	115,630	550,000
Unsecured Debt, net	1,332,688	1,577,297
Mortgages Payable [Member]
Debt Instrument [Line Items]
Mortgages payable	9,968,499	9,614,838
Deferred financing costs, net and other	(100,949)	(101,125)
Mortgages payable, net	$ 9,867,550	9,513,713
Interest Rate, End of Period (in percentage)	3.39%
Mortgages Payable [Member] \| Fixed Rate [Member]
Debt Instrument [Line Items]
Mortgages payable	$ 6,685,606	6,356,634
Interest Rate, End of Period (in percentage)	3.90%
Mortgages Payable [Member] \| Variable Rate [Member]
Debt Instrument [Line Items]
Mortgages payable	$ 3,282,893	3,258,204
Interest Rate, End of Period (in percentage)	2.34%
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Deferred financing costs, net and other	$ (4,777)	(5,841)
Unsecured debt, gross	850,000	850,000
Senior unsecured notes, net	$ 845,223	844,159
Interest Rate, End of Period (in percentage)	3.68%
Term Loan [Member]
Debt Instrument [Line Items]
Deferred financing costs, net and other	$ (3,165)	(4,362)
Unsecured debt, gross	375,000	187,500
Unsecured term loan, net	$ 371,835	183,138
Interest Rate, End of Period (in percentage)	1.67%
Unsecured Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
Unsecured revolving credit facilities	$ 115,630	$ 550,000
Interest Rate, End of Period (in percentage)	1.57%

Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	$ 1,242,895		$ 1,242,895		$ 1,223,793
Redeemable Noncontrolling Interests Rollforward [Abstract]
Reedemable Noncontrolling Interest, Beginning Balance			1,229,221	$ 1,337,780
Net income	4,366	$ 12,704	11,410	28,189
Other comprehensive income (loss)			2,326	(3,082)
Distributions			(23,582)	(22,502)
Other, net			26,814	31,478
Reedemable Noncontrolling Interest, Ending Balance	1,248,323	$ 1,113,885	1,248,323	1,113,885
Common Class A [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	1,242,895		1,242,895		1,223,793
Redeemable Noncontrolling Interests Rollforward [Abstract]
Redemption of Class A units for common shares, at redemption value			(28,126)	(46,693)
Adjustments to carry redeemable Class A units at redemption value			30,260	(295,713)
Issuance of units				80,000
Series D17 Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interests Rollforward [Abstract]
Issuance of units				$ 4,428
Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interests Additional Disclosure [Abstract]
Fair value of Series G1 through G4 convertible preferred units and Series D-13 cumulative redeemable preferred units	$ 50,561		$ 50,561		$ 50,561

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 01, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred share issuance costs (Series J redemption)		$ (7,408)	$ 0	$ (7,408)	$ 0
Series J Preferred Stock \| Redeemable Preferred Stock
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage	6.875%
Preferred Stock Redemption Price Per Share	$ 25
Preferred Stock, Redemption Amount	$ 246,250
Preferred share issuance costs (Series J redemption)				$ 7,408

Accumulated Other Comprehensive Income - ("AOCI") (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated other comprehensive income (loss), Beginning Balance	$ 72,556	$ 50,613	$ 46,921	$ 93,267
OCI before reclassifications	9,818	(7,020)	35,453	(49,674)
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	9,818	(7,020)	35,453	(49,674)
Accumulated other comprehensive income (loss), Ending Balance	82,374	43,593	82,374	43,593
Interest rate Swaps
Accumulated other comprehensive income (loss), Beginning Balance	(30,538)	(23,730)	(19,368)	(25,803)
OCI before reclassifications	7,688	(290)	(3,482)	1,783
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	7,688	(290)	(3,482)	1,783
Accumulated other comprehensive income (loss), Ending Balance	(22,850)	(24,020)	(22,850)	(24,020)
Securities available for sale [Member]
Accumulated other comprehensive income (loss), Beginning Balance	117,561	87,442	78,448	133,774
OCI before reclassifications	3,685	(7,064)	42,798	(53,396)
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	3,685	(7,064)	42,798	(53,396)
Accumulated other comprehensive income (loss), Ending Balance	121,246	80,378	121,246	80,378
Pro Rata Share Of Non Consolidated Subsidiaries Oci [Member]
Accumulated other comprehensive income (loss), Beginning Balance	(9,941)	(10,026)	(9,319)	(8,992)
OCI before reclassifications	(915)	(114)	(1,537)	(1,148)
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	(915)	(114)	(1,537)	(1,148)
Accumulated other comprehensive income (loss), Ending Balance	(10,856)	(10,140)	(10,856)	(10,140)
Other [Member]
Accumulated other comprehensive income (loss), Beginning Balance	(4,526)	(3,073)	(2,840)	(5,712)
OCI before reclassifications	(640)	448	(2,326)	3,087
Amounts reclassified from AOCI	0	0	0	0
Net current period OCI	(640)	448	(2,326)	3,087
Accumulated other comprehensive income (loss), Ending Balance	$ (5,166)	$ (2,625)	$ (5,166)	$ (2,625)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References + Details

Variable Interest Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Non Consolidated Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	$ 402,592	$ 379,939

Fair Value Measurements (Narratives) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) Investments	Dec. 31, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate fund investments	$ 519,386	$ 574,761
Real estate fund investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number Of Investments Held By Fund \| Investments	6
Real estate fund investments	$ 519,386
Excess of fair value over cost	$ 210,451
Real estate fund investments \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Anticipated Investment Holding Period	1 year
Real estate fund investments \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Anticipated Investment Holding Period	4 years 4 months

Fair Value Measurements (Details - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$ 198,165	$ 150,997
Real estate fund investments	519,386	574,761
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	198,165	150,997
Real estate fund investments	519,386	574,761
Deferred compensation plan assets (included in other assets)	118,359	117,475
Interest rate swap (included in other assets)	3,064
Total assets	838,974	843,233
Mandatorily redeemable instruments (included in other liabilities)	50,561	50,561
Interest rate swaps (included in other liabilities)	23,646	19,600
Total liabilities	74,207	70,161
Fair Value, Inputs, Level 1 \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	198,165	150,997
Real estate fund investments	0	0
Deferred compensation plan assets (included in other assets)	61,444	58,289
Interest rate swap (included in other assets)	0
Total assets	259,609	209,286
Mandatorily redeemable instruments (included in other liabilities)	50,561	50,561
Interest rate swaps (included in other liabilities)	0	0
Total liabilities	50,561	50,561
Fair Value Inputs Level 2 \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	0	0
Real estate fund investments	0	0
Deferred compensation plan assets (included in other assets)	0	0
Interest rate swap (included in other assets)	3,064
Total assets	3,064	0
Mandatorily redeemable instruments (included in other liabilities)	0	0
Interest rate swaps (included in other liabilities)	23,646	19,600
Total liabilities	23,646	19,600
Fair Value, Inputs, Level 3 \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	0	0
Real estate fund investments	519,386	574,761
Deferred compensation plan assets (included in other assets)	56,915	59,186
Interest rate swap (included in other assets)	0
Total assets	576,301	633,947
Mandatorily redeemable instruments (included in other liabilities)	0	0
Interest rate swaps (included in other liabilities)	0	0
Total liabilities	$ 0	$ 0

Fair Value Measurements (Details - Significant unobservable quantitative inputs and Investments classified as Level 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Real estate fund investments
Unobservable Quantitative Input [Abstract]
Beginning balance	$ 524,150	$ 565,976	$ 574,761	$ 513,973	$ 513,973
Purchases	0	11	0	95,011
Sales/Dispositions/distributions	0	(8,029)	(71,888)	(91,450)
Net unrealized (losses) gains	(4,764)	(2,544)	16,091	37,001
Net realized gains (losses)	0	(907)	422	1,405
Other, net	0	907	0	(526)
Ending balance	519,386	555,414	$ 519,386	555,414	$ 574,761
Real estate fund investments \| Minimum
Unobservable Quantitative Input [Abstract]
Discount rates			12.00%		12.00%
Capitalization rate			4.70%		4.80%
Real estate fund investments \| Maximum
Unobservable Quantitative Input [Abstract]
Discount rates			14.90%		14.90%
Capitalization rate			5.80%		6.10%
Real estate fund investments \| Weighted Average
Unobservable Quantitative Input [Abstract]
Discount rates			13.70%		13.60%
Capitalization rate			5.40%		5.50%
Deferred Compensation Plan Assets
Unobservable Quantitative Input [Abstract]
Beginning balance	60,140	67,668	$ 59,186	63,315	$ 63,315
Purchases	1,251	2,153	3,523	8,384
Sales/Dispositions/distributions	(3,737)	(171)	(5,888)	(5,264)
Realized and unrealized (losses) gain	(1,055)	(1,466)	(743)	1,256
Other, net	316	24	837	517
Ending balance	$ 56,915	$ 68,208	$ 56,915	$ 68,208	$ 59,186

Fair Value Measurements (Details - Deferred Compensation Plan Assets) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured Debt, Total	$ 845,223	$ 844,159
Deferred financing costs, net and other	108,891	111,328
Senior Unsecured Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior unsecured notes	850,000	850,000
Unsecured Debt, Total	845,223	844,159
Deferred financing costs, net and other	4,777	5,841
Unsecured Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior unsecured notes	375,000	187,500
Deferred financing costs, net and other	3,165	4,362
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	1,003,149	1,295,980
Mortgages payable	9,968,499	9,614,838
Unsecured revolving credit facilities	115,630	550,000
Total debt	11,309,129	11,202,338
Carrying (Reported) Amount, Fair Value Disclosure \| Senior Unsecured Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured Debt, Total	850,000	850,000
Carrying (Reported) Amount, Fair Value Disclosure \| Unsecured Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior unsecured notes	375,000	187,500
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	1,003,000	1,296,000
Mortgages payable	9,371,000	9,306,000
Unsecured revolving credit facilities	116,000	550,000
Total debt	10,758,000	10,912,000
Estimate of Fair Value, Fair Value Disclosure \| Senior Unsecured Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured Debt, Total	896,000	868,000
Estimate of Fair Value, Fair Value Disclosure \| Unsecured Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior unsecured notes	$ 375,000	$ 188,000

Incentive Compensation Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	$ 6,117	$ 6,501	$ 27,903	$ 33,328

Fee and Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Fee and Other Income (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fee And Other Income [Line Items]
BMS cleaning fees	$ 20,820	$ 18,563	$ 57,760	$ 62,937
Management and leasing fees	6,644	4,045	16,047	12,511
Lease termination fees	2,118	1,517	7,722	8,157
Other income	8,192	10,036	23,904	29,393
Fee and other income	37,774	34,161	105,433	112,998
Interstate Properties
Fee And Other Income [Line Items]
Management and leasing fees	$ 128	$ 132	$ 390	$ 403

Interest and Other Investment Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest and Other Investment Income, Net [Abstract]
Dividends on marketable securities	$ 3,354	$ 3,215	$ 9,799	$ 9,620
Interest on loans receivable	754	1,154	2,250	5,113
Mark-to-market income (loss) of investments in our deferred compensation plan	204	(2,577)	2,625	(327)
Other, net	2,196	1,368	5,588	5,212
Interest and other investment income, net	$ 6,508	$ 3,160	$ 20,262	$ 19,618

Interest and Debt Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest and Debt Expense [Abstract]
Interest expense	$ 98,210	$ 113,485	$ 302,940	$ 305,110
Amortization of deferred financing costs	8,539	7,864	26,312	22,817
Capitalized interest and debt expense	(8,384)	(11,005)	(24,822)	(33,817)
Capitalized standby loan commitment termination fee (220 Central Park South development project)	0	(15,000)	0	(15,000)
Interest and Debt Expense, Total	$ 98,365	$ 95,344	$ 304,430	$ 279,110

Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Per Share [Abstract]
Income from continuing operations, net of income attributable to noncontrolling interests	$ 89,793	$ 186,833	$ 233,826	$ 462,040
Income from discontinued operations, net of income attributable to noncontrolling interests	2,787	32,401	5,781	47,287
Net income attributable to Vornado	92,580	219,234	239,607	509,327
Preferred share dividends	(19,047)	(20,364)	(59,774)	(60,213)
Preferred share issuance costs (Series J redemption)	(7,408)	0	(7,408)	0
Net income attributable to common shareholders	66,125	198,870	172,425	449,114
Earnings allocated to unvested participating securities	(13)	(18)	(43)	(56)
Numerator for basic income per share	66,112	198,852	172,382	449,058
Convertible preferred share dividends	0	23	0	69
Earnings allocated to Out-Performance Plan units	0	0	96	628
Numerator for diluted income per share	$ 66,112	$ 198,875	$ 172,478	$ 449,755
Denominator for basic income per share - weighted average shares (in shares)	188,901	188,504	188,778	188,291
Employee stock options and restricted share awards (in shares)	1,147	1,032	1,067	1,187
Convertible preferred shares	0	45	0	46
Out-Performance Plan units	0	0	241	265
Denominator for diluted income per share - weighted average shares and assumed conversions (in shares)	190,048	189,581	190,086	189,789
INCOME PER COMMON SHARE - BASIC:
Income from continuing operations, net (in dollars per share)	$ 0.34	$ 0.88	$ 0.88	$ 2.13
Income from discontinued operations, net (in dollars per share)	0.01	0.17	0.03	0.25
Net income per common share (in dollars per share)	0.35	1.05	0.91	2.38
INCOME PER COMMON SHARE - DILUTED:
Income from continuing operations, net (in dollars per share)	0.33	0.88	0.88	2.12
Income from discontinued operations, net (in dollars per share)	0.02	0.17	0.03	0.25
Net income per common share (in dollars per share)	$ 0.35	$ 1.05	$ 0.91	$ 2.37

Income Per Share (Footnote) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Per Share [Abstract]
Weighted average common share equivalents of excluded dilutive securities due to anti-dilutive effect	12,315	11,871	12,072	11,341

Commitments and Contingencies (Details) $ in Thousands	9 Months Ended
Commitments and Contingencies (Details) $ in Thousands	Sep. 30, 2016 USD ($)
Loss Contingencies [Line Items]
Guarantees and master leases	$ 811,000
Outstanding letters of credit	38,882
Commitment To Fund Additional Capital To Partially Owned Entities	66,000
Construction Committment	687,000
NBCR Losses
Loss Contingencies [Line Items]
Insurance limit per occurrence	2,000,000
Insurance limit per property in aggregate	$ 2,000,000
Insurance Coverage End Date	December 2020
Federal government deductible, percentage of balance of a covered loss	84.00%
Earthquake California Properties
Loss Contingencies [Line Items]
Insurance limit per occurrence	$ 180,000
Insurance limit per property in aggregate	$ 180,000
Vornado deductible, percentage of property value	5.00%
All Risk And Rental Value
Loss Contingencies [Line Items]
Insurance limit per occurrence	$ 2,000,000
General Liability
Loss Contingencies [Line Items]
Insurance limit per occurrence	300,000
Insurance limit per property in aggregate	300,000
Terrorism Acts
Loss Contingencies [Line Items]
Insurance limit per occurrence	4,000,000
Insurance limit per property in aggregate	4,000,000
PPIC \| NBCR Losses
Loss Contingencies [Line Items]
Insurance deductible	$ 2,400
Insurance Deductible Percentage Of Balance Of Covered Loss	16.00%

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Segment Information (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Information [Line Items]
Total Revenues	$ 633,197	$ 627,596	$ 1,867,942	$ 1,850,686
Total expenses	444,044	436,156	1,492,255	1,298,141
Operating income	189,153	191,440	375,687	552,545
Income (loss) from partially owned entities	4,127	(325)	529	(8,709)
Income from real estate fund investments	1,077	1,665	28,750	52,122
Interest and other investment income, net	6,508	3,160	20,262	19,618
Interest and debt expense	(98,365)	(95,344)	(304,430)	(279,110)
Net gain on disposition of wholly owned and partially owned assets	0	103,037	160,225	104,897
Income (loss) before income taxes	102,500	203,633	281,023	441,363
Income tax (expense) benefit	(4,865)	(2,856)	(9,805)	84,245
Income (loss) from continuing operations	97,635	200,777	271,218	525,608
Income from discontinued operations	2,969	34,463	6,160	50,278
Net income	100,604	235,240	277,378	575,886
Net income attributable to Vornado	92,580	219,234	239,607	509,327
Net income attributable to noncontrolling interest in the Operating Partnership	4,366	12,704	11,410	28,189
Operating Segments
Segment Information [Line Items]
Total Revenues	633,197	627,596	1,867,942	1,850,686
Total expenses	444,044	436,156	1,492,255	1,298,141
Operating income	189,153	191,440	375,687	552,545
Income (loss) from partially owned entities	4,127	(325)	529	(8,709)
Income from real estate fund investments	1,077	1,665	28,750	52,122
Interest and other investment income, net	6,508	3,160	20,262	19,618
Interest and debt expense	(98,365)	(95,344)	(304,430)	(279,110)
Net gain on disposition of wholly owned and partially owned assets		103,037	160,225	104,897
Income (loss) before income taxes	102,500	203,633	281,023	441,363
Income tax (expense) benefit	(4,865)	(2,856)	(9,805)	84,245
Income (loss) from continuing operations	97,635	200,777	271,218	525,608
Income from discontinued operations	2,969	34,463	6,160	50,278
Net income	100,604	235,240	277,378	575,886
Less net income attributable to noncontrolling interests	(8,024)	(16,006)	(37,771)	(66,559)
Net income attributable to Vornado	92,580	219,234	239,607	509,327
Net income attributable to noncontrolling interest in the Operating Partnership	4,366	12,704	11,410	28,189
Interest and debt expense	122,979	118,977	376,898	348,725
Depreciation and amortization	172,980	174,209	521,143	493,904
Income tax (benefit) expense	5,102	3,043	13,067	(85,349)
EBITDA	398,007	528,167	1,162,125	1,294,796
New York Segment \| Operating Segments
Segment Information [Line Items]
Total Revenues	432,869	429,433	1,269,464	1,243,208
Total expenses	280,689	263,805	818,419	766,863
Operating income	152,180	165,628	451,045	476,345
Income (loss) from partially owned entities	(579)	4,010	(5,143)	1,523
Income from real estate fund investments	0	0	0	0
Interest and other investment income, net	1,355	1,888	3,684	5,642
Interest and debt expense	(51,212)	(50,480)	(162,193)	(143,004)
Net gain on disposition of wholly owned and partially owned assets		0	159,511	0
Income (loss) before income taxes	101,744	121,046	446,904	340,506
Income tax (expense) benefit	(2,356)	(1,147)	(4,131)	(3,185)
Income (loss) from continuing operations	99,388	119,899	442,773	337,321
Income from discontinued operations	0	0	0	0
Net income	99,388	119,899	442,773	337,321
Less net income attributable to noncontrolling interests	(2,985)	(2,582)	(9,811)	(6,640)
Net income attributable to Vornado	96,403	117,317	432,962	330,681
Net income attributable to noncontrolling interest in the Operating Partnership	0	0	0	0
Interest and debt expense	66,314	64,653	208,683	184,377
Depreciation and amortization	111,731	99,206	331,448	288,897
Income tax (benefit) expense	2,445	1,214	4,424	3,368
EBITDA	276,893	282,390	977,517	807,323
Washington DC Segment \| Operating Segments
Segment Information [Line Items]
Total Revenues	134,446	132,704	389,926	401,528
Total expenses	90,756	102,114	436,427	293,772
Operating income	43,690	30,590	(46,501)	107,756
Income (loss) from partially owned entities	(452)	(1,909)	(5,453)	(3,583)
Income from real estate fund investments	0	0	0	0
Interest and other investment income, net	49	34	141	60
Interest and debt expense	(18,644)	(16,580)	(54,396)	(52,223)
Net gain on disposition of wholly owned and partially owned assets		102,404	0	102,404
Income (loss) before income taxes	24,643	114,539	(106,209)	154,414
Income tax (expense) benefit	(302)	(287)	(884)	(79)
Income (loss) from continuing operations	24,341	114,252	(107,093)	154,335
Income from discontinued operations	0	0	0	0
Net income	24,341	114,252	(107,093)	154,335
Less net income attributable to noncontrolling interests	0	0	0	0
Net income attributable to Vornado	24,341	114,252	(107,093)	154,335
Net income attributable to noncontrolling interest in the Operating Partnership	0	0	0	0
Interest and debt expense	20,991	20,010	63,038	62,413
Depreciation and amortization	37,123	48,132	119,109	136,687
Income tax (benefit) expense	310	294	2,780	(1,856)
EBITDA	82,765	182,688	77,834	351,579
Other Segment \| Operating Segments
Segment Information [Line Items]
Total Revenues	65,882	65,459	208,552	205,950
Total expenses	72,599	70,237	237,409	237,506
Operating income	(6,717)	(4,778)	(28,857)	(31,556)
Income (loss) from partially owned entities	5,158	(2,426)	11,125	(6,649)
Income from real estate fund investments	1,077	1,665	28,750	52,122
Interest and other investment income, net	5,104	1,238	16,437	13,916
Interest and debt expense	(28,509)	(28,284)	(87,841)	(83,883)
Net gain on disposition of wholly owned and partially owned assets		633	714	2,493
Income (loss) before income taxes	(23,887)	(31,952)	(59,672)	(53,557)
Income tax (expense) benefit	(2,207)	(1,422)	(4,790)	87,509
Income (loss) from continuing operations	(26,094)	(33,374)	(64,462)	33,952
Income from discontinued operations	2,969	34,463	6,160	50,278
Net income	(23,125)	1,089	(58,302)	84,230
Less net income attributable to noncontrolling interests	(5,039)	(13,424)	(27,960)	(59,919)
Net income attributable to Vornado	(28,164)	(12,335)	(86,262)	24,311
Net income attributable to noncontrolling interest in the Operating Partnership	4,366	12,704	11,410	28,189
Interest and debt expense	35,674	34,314	105,177	101,935
Depreciation and amortization	24,126	26,871	70,586	68,320
Income tax (benefit) expense	2,347	1,535	5,863	(86,861)
EBITDA	$ 38,349	$ 63,089	$ 106,774	$ 135,894

Segment Information (Notes to preceding tabular information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Information [Line Items]
Mark-to-market income (loss) of investments in our deferred compensation plan	$ 204	$ (2,577)	$ 2,625	$ (327)
Transaction Costs Spin Off	0	0	0	22,972
Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	398,007	528,167	1,162,125	1,294,796
Corporate General And Administrative Expenses
Segment Information [Line Items]
Mark-to-market income (loss) of investments in our deferred compensation plan	204	(2,577)	2,625	(327)
New York Segment \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	276,893	282,390	977,517	807,323
New York Segment \| Office \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	159,937	161,168	475,726	480,508
New York Segment \| Office \| Properties Sold and other \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization		5,151	2,935	16,954
New York Segment \| Office \| Excluding properties sold and other \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization		156,017	472,791	463,554
New York Segment \| Retail \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	95,274	97,604	284,212	265,060
New York Segment \| Retail \| Properties Sold and other \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization		524	185	1,597
New York Segment \| Retail \| Excluding properties sold and other \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization		97,080	284,027	263,463
New York Segment \| Residential \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	6,214	5,495	18,901	16,254
New York Segment \| Alexanders Inc \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	11,506	10,502	34,880	31,150
New York Segment \| Hotel Pennsylvania \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	3,962	7,621	4,287	14,351
New York Segment \| Net gain on sale of 7 west 34th street \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	0	159,511	0
New York Segment \| EBITDA before Gain on Sale \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	276,893	282,390	818,006	807,323
Washington DC Segment \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	82,765	182,688	77,834	351,579
Washington DC Segment \| Office \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	71,295	172,281	45,123	321,198
Washington DC Segment \| Residential \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	11,470	10,407	32,711	30,381
Washington DC Segment \| Skyline Properties \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	4,222	5,998	14,177	19,037
Washington DC Segment \| Skyline Properties \| Impairment Loss \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	0	(160,700)	0
Washington DC Segment \| Office, excluding the Skyline properties \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	67,073	63,879	191,646	199,757
Washington DC Segment \| Office, excluding the Skyline properties \| Properties Sold and other \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization		1,601		5,591
Washington DC Segment \| Office, excluding the Skyline properties \| Excluding properties sold and other \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization		62,278		194,166
Washington DC Segment \| 1750 Pennsylvania Avenue \| Net Gain On Sale Of Real Estate \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	102,404	0	102,404
Other Segment \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	38,349	63,089	106,774	135,894
Other Segment \| Real estate fund investments \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	807	1,623	13,662	22,669
Other Segment \| The Mart and trade shows \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	21,696	19,044	70,689	62,229
Other Segment \| 555 California Street \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	11,405	13,005	35,137	38,237
Other Segment \| India real estate ventures \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	836	13	2,585	2,229
Other Segment \| Other Investments \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	19,092	11,009	46,180	31,705
Other Segment \| Corporate General And Administrative Expenses \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	(21,519)	(22,341)	(76,364)	(82,043)
Mark-to-market income (loss) of investments in our deferred compensation plan	204	(2,577)	2,625	(327)
Additional Expense From Acceleration Of Vesting				4,542
Other Segment \| Investment Income and other, net \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	6,871	5,952	19,317	21,275
Other Segment \| Our share of impairment loss on India real estate ventures \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	0	0	(14,806)
Other Segment \| Acquisition and transaction related costs \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	(3,808)	(1,518)	(11,319)	(7,560)
Other Segment \| Net gain on sale of residential condominiums \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	633	714	2,493
Other Segment \| Net gain on sale of Monmouth Mall \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	33,153	0	33,153
Other Segment \| Other EBITDA attributable to identifiable investments \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	53,836	44,694	168,253	157,069
Other Segment \| UE and residual retail properties discontinued operations \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	2,969	2,516	6,173	26,313
Transaction Costs Spin Off				22,972
Other Segment \| Income before net realized/unrealized gains \| Real estate fund investments \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	2,552	2,594	6,309	6,879
Other Segment \| Net unrealized/realized (losses) gains on investments \| Real estate fund investments \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	(2,118)	(922)	3,333	9,542
Other Segment \| Carried Interest \| Real estate fund investments \| Operating Segments
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	$ 373	$ (49)	$ 4,020	$ 6,248

Segment Reporting (Details - Change results in an increase (decrease) in both Other and Total) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Information [Line Items]
Net income (loss) attributable to the noncontrolling interest in the Operating Partnership	$ 14,531	$ (7,487)	$ 15,042	$ 12,704	$ 10,198	$ 5,287	$ 7,044	$ 15,485	$ 28,189	$ 43,231	$ 47,613	$ 24,817
As Reported
Segment Information [Line Items]
Net income (loss) attributable to the noncontrolling interest in the Operating Partnership	546,681	210,393	542,928	515,463	376,681	374,463	757,074	751,144	1,266,607	1,809,535	2,229,471	1,993,880
As restated
Segment Information [Line Items]
Net income (loss) attributable to the noncontrolling interest in the Operating Partnership	561,212	202,906	557,970	528,167	386,879	379,750	764,118	766,629	1,294,796	1,852,766	2,277,084	2,018,697
Other Segment
Segment Information [Line Items]
Net income (loss) attributable to the noncontrolling interest in the Operating Partnership	14,531	(7,487)	15,042	12,704	10,198	5,287	7,044	15,485	28,189	43,231	47,613	24,817
Other Segment \| As Reported
Segment Information [Line Items]
Net income (loss) attributable to the noncontrolling interest in the Operating Partnership	27,102	34,279	20,541	50,385	15,059	42,261	61,381	57,320	107,705	128,246	454,692	572,975
Other Segment \| As restated
Segment Information [Line Items]
Net income (loss) attributable to the noncontrolling interest in the Operating Partnership	$ 41,633	$ 26,792	$ 35,583	$ 63,089	$ 25,257	$ 47,548	$ 68,425	$ 72,805	$ 135,894	$ 171,477	$ 502,305	$ 597,792

Subsequent Events (Details) - Subsequent Event - Joint Venture	Oct. 31, 2016
Subsequent Events [Line Items]
Subsequent Event, Description	our Board of Trustees approved the tax-free spin-off of our Washington, DC business and we entered into a definitive agreement to merge it with the business and certain select assets of The JBG Companies (“JBG”), a Washington, DC real estate company
Pro Rata Distribution
Subsequent Events [Line Items]
Initial Form 10 registration statement relating to the spin-off is expected to be filed with the SEC	Fourth quarter of 2016
Distribution and combination are expected to be completed	Second quarter of 2017
Vornado Trust Realty and Vornado Realty LP \| Pro Rata Distribution
Subsequent Events [Line Items]
Pro rata basis of distribution	1:2