Vornado Realty Trust (VNO) 10-K 16 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Jun. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	VORNADO REALTY TRUST
Entity Central Index Key	899,689
Document Type	10-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	188,576,853
Entity Public Float		$ 16,366,466
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Trading Symbol	vno

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Real estate, at cost:
Land	$ 4,164,799	$ 3,861,913
Buildings and improvements	12,582,671	11,705,749
Development costs and construction in progress	1,226,637	1,128,037
Leasehold improvements and equipment	116,030	126,659
Total	18,090,137	16,822,358
Less accumulated depreciation and amortization	(3,418,267)	(3,161,633)
Real estate, net	14,671,870	13,660,725
Cash and cash equivalents	1,835,707	1,198,477
Restricted cash	107,799	176,204
Marketable securities	150,997	206,323
Tenant and other receivables, net of allowance for doubtful accounts of $11,908 and $12,210	98,062	109,998
Investments in partially owned entities	1,550,422	1,240,489
Real estate fund investments	574,761	513,973
Receivable arising from the straight-lining of rents, net of allowance of $2,751 and $3,188	931,245	787,271
Deferred leasing costs, net of accumulated amortization of $218,239 and $212,339	480,421	382,433
Identified intangible assets, net of accumulated amortization of $187,360 and $199,821	227,901	225,155
Assets related to discontinued operations	37,020	2,234,128
Other assets	477,088	422,804
Assets	21,143,293	21,157,980
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Mortgages payable, net	9,513,713	8,187,843
Senior unsecured notes, net	844,159	1,342,494
Unsecured revolving credit facilities	550,000	0
Unsecured term loan, net	183,138	0
Accounts payable and accrued expenses	443,955	447,745
Deferred revenue	346,119	358,613
Deferred compensation plan	117,475	117,284
Liabilities related to discontinued operations	12,470	1,501,009
Other liabilities	426,965	375,830
Total liabilities	$ 12,437,994	$ 12,330,818
Commitments and contingencies
Redeemable noncontrolling interests:
Class A units - 12,242,820 and 11,356,550 units outstanding	$ 1,223,793	$ 1,336,780
Series D cumulative redeemable preferred units - 177,101 and 1 units outstanding	5,428	1,000
Total redeemable noncontrolling interests	1,229,221	1,337,780
Vornado shareholders' equity:
Preferred shares of beneficial interest: no par value per share; authorized 110,000,000 shares; issued and outstanding 52,676,629 and 52,678,939 shares	1,276,954	1,277,026
Common shares of beneficial interest: $.04 par value per share; authorized 250,000,000 shares; issued and outstanding 188,576,853 and 187,887,498 shares	7,521	7,493
Additional capital	7,132,979	6,873,025
Earnings less than distributions	(1,766,780)	(1,505,385)
Accumulated other comprehensive income	46,921	93,267
Total Vornado shareholders' equity	6,697,595	6,745,426
Noncontrolling interests in consolidated subsidiaries	778,483	743,956
Total equity	7,476,078	7,489,382
Total liabilities, redeemable noncontrolling interests and equity	$ 21,143,293	$ 21,157,980

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Tenant and other receivables, allowance for doubtful accounts (in US dollars)	$ 11,908	$ 12,210
Receivable arising from the straight-lining of rents, allowance (in US dollars)	2,751	3,188
Deferred leasing costs, accumulated amortization (in US dollars)	218,239	212,339
Identified intangible assets, accumulated amortization (in US dollars)	$ 187,360	$ 199,821
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	52,676,629	52,678,939
Preferred shares of beneficial interest: outstanding shares	52,676,629	52,678,939
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	188,576,853	187,887,498
Common shares of beneficial interest: outstanding shares	188,576,853	187,887,498
Common Class A [Member]
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	12,242,820	11,356,550
Series D Cumulative Redeemable Preferred Unit [Member]
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	177,101	1

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUES:
Property rentals	$ 2,076,586	$ 1,911,487	$ 1,880,405
Tenant expense reimbursements	260,976	245,819	226,831
Cleveland Medical Mart development project	0	0	36,369
Fee and other income	164,705	155,206	155,571
Total revenues	2,502,267	2,312,512	2,299,176
EXPENSES:
Operating	1,011,249	953,611	928,565
Depreciation and amortization	542,952	481,303	461,627
General and administrative	175,307	169,270	177,366
Cleveland Medical Mart development project	0	0	32,210
Acquisition and transaction related costs	12,511	18,435	24,857
Total expenses	1,742,019	1,622,619	1,624,625
Operating income	760,248	689,893	674,551
Income from real estate fund investments	74,081	163,034	102,898
Loss from partially owned entities	(12,630)	(59,861)	(340,882)
Interest and other investment income (loss), net	26,978	38,752	(24,887)
Interest and debt expense	(378,025)	(412,755)	(425,782)
Net gain on disposition of wholly owned and partially owned assets	251,821	13,568	2,030
Income (loss) before income taxes	722,473	432,631	(12,072)
Income tax benefit (expense)	84,695	(9,281)	8,717
Income (loss) from continuing operations	807,168	423,350	(3,355)
Income from discontinued operations	52,262	585,676	568,095
Net income	859,430	1,009,026	564,740
Less net income attributable to noncontrolling interests in:
Consolidated subsidiaries	(55,765)	(96,561)	(63,952)
Operating Partnership	(43,231)	(47,613)	(24,817)
Net income attributable to Vornado	760,434	864,852	475,971
Preferred share dividends	(80,578)	(81,464)	(82,807)
Preferred unit and share redemptions	0	0	(1,130)
NET INCOME attributable to common shareholders	$ 679,856	$ 783,388	$ 392,034
INCOME (LOSS) PER COMMON SHARE - BASIC:
Income (loss) from continuing operations, net (in dollars per share)	$ 3.35	$ 1.23	$ (0.75)
Income from discontinued operations, net (in dollars per share)	0.26	2.95	2.85
Net income per common share (in dollars per share)	$ 3.61	$ 4.18	$ 2.10
Weighted average shares outstanding	188,353	187,572	186,941
INCOME (LOSS) PER COMMON SHARE - DILUTED:
Income (loss) from continuing operations, net (in dollars per share)	$ 3.33	$ 1.22	$ (0.75)
Income from discontinued operations, net (in dollars per share)	0.26	2.93	2.84
Net income per common share (in dollars per share)	$ 3.59	$ 4.15	$ 2.09
Weighted average shares outstanding	189,564	188,690	187,709

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income	$ 859,430	$ 1,009,026	$ 564,740
Other comprehensive (loss) income:
(Reduction) increase in unrealized net gain on available-for-sale securities	(55,326)	14,465	142,281
Amounts reclassified from accumulated other comprehensive income for the sale of available-for-sale securities	0	0	(42,404)
Pro rata share of other comprehensive (loss) income of nonconsolidated subsidiaries	(327)	2,509	(22,814)
Increase in value of interest rate swap and other	6,441	6,079	18,716
Comprehensive income	810,218	1,032,079	660,519
Less comprehensive income attributable to noncontrolling interests	(96,130)	(145,497)	(94,065)
Comprehensive income attributable to Vornado	$ 714,088	$ 886,582	$ 566,454

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands	Total	Series L Preferred Stock [Member]	Series F And Series H Preferred Stock [Member]	Real estate fund investments	Other	Preferred Shares	Preferred SharesSeries L Preferred Stock [Member]	Preferred SharesSeries F And Series H Preferred Stock [Member]	Common Shares	Additional Capital	Earnings Less Than Distributions	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests in Consolidated Subsidiaries	Non-controlling Interests in Consolidated SubsidiariesReal estate fund investments	Non-controlling Interests in Consolidated SubsidiariesOther
Beginning balance, Shares at Dec. 31, 2012						51,185			186,735
Beginning balance, Value at Dec. 31, 2012	$ 7,904,144					$ 1,240,278			$ 7,440	$ 7,195,438	$ (1,573,275)	$ (18,946)	$ 1,053,209
Net income attributable to Vornado	475,971										475,971
Net income attributable to noncontrolling interests in consolidated subsidiaries	63,952			$ 53,427									63,952
Dividends on common shares	(545,913)										(545,913)
Dividends on preferred shares	(82,807)										(82,807)
Issuance of preferred shares, Shares							12,000
Issuance of preferred shares, Value		$ 290,306					$ 290,306
Redemption of preferred shares, Shares								(10,500)
Redemption of preferred shares, Value			$ (253,269)					$ (253,269)
Common shares issued:
Upon redemption of Class A units, at redemption value, Shares									299
Upon redemption of Class A units, at redemption value, Value	25,317								$ 12	25,305
Under employees' share option plan, Shares									104
Under employees' share option plan, Value	5,808								$ 23	5,892	(107)
Under dividend reinvestment plan, Shares									22
Under dividend reinvestment plan, Value	1,851								$ 1	1,850
Upon acquisition of real estate, Shares									128
Upon acquisition of real estate, Value	11,461								$ 5	11,456
Contributions:
Contributions				28,078	$ 15,886									$ 28,078	$ 15,886
Distribution:
Distributions				(47,268)	(133,153)									(47,268)	(133,153)
Transfer of noncontrolling interest in real estate fund	0
Conversion of Series A preferred shares to common shares, Shares						(2)			3
Conversion of Series A preferred shares to common shares, Value						$ (90)			$ 0	90
Deferred compensation shares and options, Shares									(6)
Deferred compensation shares and options, Value	9,270								$ (12)	9,589	(307)
(Reduction) increase in unrealized net gain on available-for-sale securities	142,281											142,281
Pro rata share of other comprehensive (loss) income of nonconsolidated subsidiaries	(22,814)											(22,814)
Increase in value of interest rate swap	18,183											18,183
Amounts reclassified related to sale of available-for-sale securities	(42,404)											(42,404)
Adjustments to carry redeemable Class A units at redemption value	(108,252)									(108,252)
Redeemable noncontrolling interests' share of above adjustments	(5,296)											(5,296)
Preferred unit and share redemptions	(1,130)										(1,130)
Deconsolidation of partially owned entity	(165,427)												(165,427)
Consolidation of a partially owned entity	16,799												16,799
Other	(6,830)									2,472	(7,271)	533	(2,564)
Ending balance, Shares at Dec. 31, 2013						52,683			187,285
Ending balance, Value at Dec. 31, 2013	7,594,744					$ 1,277,225			$ 7,469	7,143,840	(1,734,839)	71,537	829,512
Net income attributable to Vornado	864,852										864,852
Net income attributable to noncontrolling interests in consolidated subsidiaries	96,561			92,728									96,561
Dividends on common shares	(547,831)										(547,831)
Dividends on preferred shares	(81,464)										(81,464)
Common shares issued:
Upon redemption of Class A units, at redemption value, Shares									271
Upon redemption of Class A units, at redemption value, Value	27,273								$ 11	27,262
Under employees' share option plan, Shares									304
Under employees' share option plan, Value	14,047								$ 12	17,428	(3,393)
Under dividend reinvestment plan, Shares									17
Under dividend reinvestment plan, Value	1,804								$ 1	1,803
Contributions:
Contributions				5,297	32,998									5,297	32,998
Distribution:
Distributions	(33,469)			(182,964)	(4,463)									(182,964)	(4,463)
Transfer of noncontrolling interest in real estate fund	(33,028)												(33,028)
Conversion of Series A preferred shares to common shares, Shares						(4)			5
Conversion of Series A preferred shares to common shares, Value						$ (193)			$ 0	193
Deferred compensation shares and options, Shares									5
Deferred compensation shares and options, Value	5,512								$ 0	5,852	(340)
(Reduction) increase in unrealized net gain on available-for-sale securities	14,465											14,465
Pro rata share of other comprehensive (loss) income of nonconsolidated subsidiaries	2,509											2,509
Increase in value of interest rate swap	6,079											6,079
Amounts reclassified related to sale of available-for-sale securities	0
Adjustments to carry redeemable Class A units at redemption value	(315,276)									(315,276)
Redeemable noncontrolling interests' share of above adjustments	(1,323)											(1,323)
Preferred unit and share redemptions	0
Other	(10,410)					$ (6)				(8,077)	(2,370)		43
Ending balance, Shares at Dec. 31, 2014						52,679			187,887
Ending 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	760,434										760,434
Net income attributable to noncontrolling interests in consolidated subsidiaries	55,765			40,117									55,765
Distribution of Urban Edge Properties	(464,603)										(464,262)		(341)
Dividends on common shares	(474,751)										(474,751)
Dividends on preferred shares	(80,578)										(80,578)
Common shares issued:
Upon redemption of Class A units, at redemption value, Shares									452
Upon redemption of Class A units, at redemption value, Value	48,230								$ 18	48,212
Under employees' share option plan, Shares									214
Under employees' share option plan, Value	12,762								$ 9	15,332	(2,579)
Under dividend reinvestment plan, Shares									14
Under dividend reinvestment plan, Value	1,438								$ 1	1,437
Contributions:
Contributions				51,725	250									51,725	250
Distribution:
Distributions	(30,263)			$ (72,114)	$ (525)									$ (72,114)	$ (525)
Transfer of noncontrolling interest in real estate fund	0
Conversion of Series A preferred shares to common shares, Shares						(2)			4
Conversion of Series A preferred shares to common shares, Value						$ (72)			$ 1	71
Deferred compensation shares and options, Shares									6
Deferred compensation shares and options, Value	2,080								$ 1	2,438	(359)
(Reduction) increase in unrealized net gain on available-for-sale securities	(55,326)											(55,326)
Pro rata share of other comprehensive (loss) income of nonconsolidated subsidiaries	(327)											(327)
Increase in value of interest rate swap	6,435											6,435
Amounts reclassified related to sale of available-for-sale securities	0
Adjustments to carry redeemable Class A units at redemption value	192,464									192,464
Redeemable noncontrolling interests' share of above adjustments	2,866											2,866
Preferred unit and share redemptions	0
Other	471								$ (2)		700	6	(233)
Ending balance, Shares at Dec. 31, 2015						52,677			188,577
Ending balance, Value at Dec. 31, 2015	$ 7,476,078					$ 1,276,954			$ 7,521	$ 7,132,979	$ (1,766,780)	$ 46,921	$ 778,483

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities:
Net income	$ 859,430	$ 1,009,026	$ 564,740
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	566,207	583,408	561,998
Net gain on disposition of wholly owned and partially owned assets	(251,821)	(13,568)	(3,407)
Straight-lining of rental income	(153,668)	(82,800)	(69,391)
Return of capital from real estate fund investments	91,458	215,676	56,664
Reversal of allowance for deferred tax assets	(90,030)	0	0
Amortization of below-market leases, net	(79,053)	(46,786)	(52,876)
Net gains on sale of real estate and other	(65,396)	(507,192)	(414,502)
Distributions of income from partially owned entities	65,018	96,286	54,030
Net realized and unrealized gains on real estate fund investments	(57,752)	(150,139)	(85,771)
Other non-cash adjustments	37,721	37,303	41,663
Loss from partially owned entities	12,630	59,861	340,882
Impairment losses and tenant buy-outs	256	26,518	37,170
Defeasance cost in connection with the refinancing of mortgage payable	0	5,589	0
Losses from the disposition of investment in J.C. Penney	0	0	72,974
Changes in operating assets and liabilities:
Real estate fund investments	(95,010)	(3,392)	(37,817)
Tenant and other receivables, net	11,936	(8,282)	83,897
Prepaid assets	(14,804)	(8,786)	(2,207)
Other assets	(116,157)	(123,435)	(50,856)
Accounts payable and accrued expenses	(33,747)	44,628	(41,729)
Other liabilities	(14,320)	3,125	(12,576)
Net cash provided by operating activities	672,150	1,135,310	1,040,789
Cash Flows from Investing Activities:
Proceeds from sales of real estate and related investments	573,303	388,776	1,027,608
Development costs and construction in progress	(490,819)	(544,187)	(469,417)
Acquisitions of real estate and other	(478,215)	(211,354)	(193,417)
Additions to real estate	(301,413)	(279,206)	(260,343)
Investments in partially owned entities	(235,439)	(120,639)	(230,300)
Restricted cash	200,229	99,464	(26,892)
Distributions of capital from partially owned entities	37,818	25,943	290,404
Proceeds from sales and repayments of mortgage and mezzanine loans receivable and other	16,790	96,913	50,569
Investments in loans receivable and other	(1,000)	(30,175)	(390)
Proceeds from sales of, and return of investment in, marketable securities	0	0	378,709
Proceeds from the sale of LNR	0	0	240,474
Funding of J.C. Penney derivative collateral; and settlement of derivative in 2013	0	0	(186,079)
Return of J.C. Penney derivative collateral	0	0	101,150
Net cash (used in) provided by investing activities	(678,746)	(574,465)	722,076
Cash Flows from Financing Activities:
Proceeds from borrowings	4,468,872	2,428,285	2,262,245
Repayments of borrowings	(2,936,578)	(1,312,258)	(3,580,100)
Dividends paid on common shares	(474,751)	(547,831)	(545,913)
Cash included in the spin-off of Urban Edge Properties	(225,000)	0	0
Distributions to noncontrolling interests	(102,866)	(220,895)	(215,247)
Dividends paid on preferred shares	(80,578)	(81,468)	(83,188)
Debt issuance and other costs	(66,554)	(58,336)	(19,883)
Contributions from noncontrolling interests	51,975	30,295	43,964
Proceeds received from exercise of employee share options	16,779	19,245	7,765
Repurchase of shares related to stock compensation agreements and related tax withholdings and other	(7,473)	(3,811)	(443)
Purchase of marketable securities in connection with the defeasance of mortgage payable	0	(198,884)	0
Purchases of outstanding preferred units and shares	0	0	(299,400)
Proceeds from the issuance of preferred shares	0	0	290,306
Net cash provided by (used in) financing activities	643,826	54,342	(2,139,894)
Net increase (decrease) in cash and cash equivalents	637,230	615,187	(377,029)
Cash and cash equivalents at beginning of period	1,198,477	583,290	960,319
Cash and cash equivalents at end of period	1,835,707	1,198,477	583,290
Supplemental Disclosure Of Cash Flow Information:
Cash payments for interest, excluding capitalized interest of $48,539, $53,139 and $42,303	376,620	443,538	465,260
Cash payments for income taxes	8,287	11,696	9,023
Non-cash distribution of Urban Edge Properties:
Assets	1,709,256	0	0
Liabilities	(1,469,659)	0	0
Equity	(239,597)	0	0
Adjustments to carry redeemable Class A units at redemption value	192,464	(315,276)	(108,252)
Write-off of fully depreciated assets	(167,250)	(121,673)	(77,106)
Transfer of interest in real estate to Pennsylvania Real Estate Investment Trust	(145,313)	0	0
Accrued capital expenditures included in accounts payable and accrued expenses	122,711	100,528	72,042
Class A units in connection with acquisition	80,000	0	0
Financing assumed in acquisitions	62,000	0	79,253
Marketable securities transferred in connection with the defeasance of mortgage payable	0	198,884	0
Defeasance of mortgage notes payable	0	(193,406)	0
Elimination of a mortgage and mezzanine loan asset and liability	0	59,375	0
Transfer of interest in real estate fund to an unconsolidated joint venture	0	(58,564)	0
Transfer of noncontrolling interest in real estate fund	0	(33,028)	0
Beverly Connection seller financing	0	13,620	0
Decrease in assets and liabilities resulting from the deconsolidation of discontinued operations and/or investments that were previously consolidated:
Real estate, net	0	0	(852,166)
Mortgages payable	0	0	(322,903)
Discontinued Operations [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Loss from partially owned entities	11,882	58,131	338,785
Acquisitions [Member]
Non-cash distribution of Urban Edge Properties:
Like-kind exchange of real estate	80,269	606,816	66,076
Dispositions [Member]
Non-cash distribution of Urban Edge Properties:
Like-kind exchange of real estate	$ (213,621)	$ (630,352)	$ (128,767)

Consolidated Statements of Cas8

Consolidated Statements of Cash Flows (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Cash Flows [Abstract]
Capitalized interest	$ 48,539	$ 53,139	$ 42,303

Organization and Business

Organization and Business	12 Months Ended
	Dec. 31, 2015
Organization and Business [Abstract]
Organization and Business	1. Organization and Business Vornado Realty Trust (“Vornado”) is a fully -integrated real estate investment trust (“REIT”) and conducts its business through, and substantially all of its interests in properties are held by, Vornado Realty L.P., a Delaware limited partnership (the “Operating Partnership”). Accordingly, Vornado's cash flow and ability to pay dividends to its shareholders is dependent upon the cash flow of the Operating Partnership and the ability of its direct and indirect subsidiaries to first satisfy their obligations to creditors. Vornado is the sole general partner of, and owned approximately 93.7 % of the common limited partnership interest in the Operating Partnership at December 31, 2015. All references to “we,” “us,” “our,” the “Company” and “Vornado” refer to Vornado Realty Trust and its consolidated subsidiaries, including the Operating Partnership. On January 15, 2015, we completed the spin-off of substantially all of our retail segment comprised of 79 strip shopping centers, three malls, a warehouse park and $225,000,000 of cash to Urban Edge Properties (“UE”) (NYSE: UE). As part of this transaction, we retained 5,717,184 UE operating partnership units (5.4% ownership interest). We are providing transition services to UE for an initial period of up to two years, primarily for 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, Inc. (NYSE: ALX) Rego Park retail assets. Steven Roth, our Chairman and Chief Executive Officer , is a member of the Board of Trustees of UE. The spin-off distribution was effected by Vornado distributing one UE common share for every two Vornado common shares. The historical financial results of UE are reflected in our consolidated financial statements as discontinued operations for all periods presented. W e currently own all or portions of : New York : 2 1 . 3 million square feet of Manhattan office space in 3 5 properties ; 2. 6 million square feet of Manhattan street retail space in 65 properties; 1,711 units in eleven residential properties; The 1,700 room Hotel Pennsylvania located on Seventh Avenue at 33 rd Street in the h eart of the Penn Plaza district ; A 32.4% interest in Alexander's, Inc . (NYSE: ALX), which owns s even properties in the greater New York metropolitan area, including 731 Lexington Avenue, the 1.3 million square foot Bloomberg , L.P. headquarters building; Was h ington, DC: 15 . 8 million square feet of office space in 57 properties ; 2,414 units in seven residential properties ; Other Real Estate and Related Investments: The 3.6 million square foot Mart (“ the Mart ”) in Chicago; A 70% controlling interest in 555 California Street, a three-building office complex in San Francisco's financial district aggregating 1.8 million square feet, known as the Bank of America Center; A 25.0% interest in Vornado Capital Partners, our real estate fund . We are the general partner and investment manager of the fund ; A 32.5% interest in Toys “R” Us, Inc. (“Toys”) ; and O ther real estate and other investments .

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
Basis of Presentation and Significant Accounting Policies [Abstract]
Basis Of Presentation And Significant Accounting Policies	2 . Basis of Presentation and Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements include the accounts of Vornado and its consolidated subsidiaries, including the Operating Partnership . All inter-company amounts have been eliminated. Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America, which require us to make estimates and assumptions that affect the reported amounts of assets and liabilities , disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates . Certain prior year balances have been reclassified in order to conform to the current period presentation. Beginning in the year ended December 31, 2015, we classified signage revenue within “property rentals”. For the years ended December 31, 2014 and 2013, $37,929,000 and $32,866,000, respectively, related to signage revenue has been reclassified from “fee and other income” to “property rentals” to conform to the current period presentation. On January 15, 2015, we completed the spin-off of substantially all of our retail segment comprised of 79 strip shopping centers, three malls, a warehouse park and $225 ,000,000 of cash to UE. As part of this tra nsaction, we received 5,717,184 UE operating partnership units (5.4% ownership interest). Recently Issued Accounting Literature In April 2014, the Financial Accounting Standards Board (“FASB”) issued an update (“ASU 2014-08”) Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity to ASC Topic 205, Presentation of Financial Statements and ASC Topic 360, Property Plant and Equipment. Under ASU 2014-08, only disposals that represent a strategic shift that has (or will have) a major effect on the entity's results and operations would qualify as discontinued operations. In addition, ASU 2014-08 expands the disclosure requirements for disposals that meet the definition of a discontinued operation and requires entities to disclose information about disposals of individually significant components that do not meet the definition of discontinued operations. ASU 2014-08 is effective for interim and annual reporting periods in fiscal years that began after December 15, 2014. Upon adoption of this standard on January 1, 2015, individual properties sold in the ordinary course of business are not expected to qualify as discontinued operations. Under ASU 2014-08, operating results of disposals are included in income from continuing operations, and any associated gains are now included in “n et g ain on d isposition of w holly o wned and p artially owned a ssets ” on our consolidated statements of income . Gain on sales of properties classified as discontinued operations prior to January 1, 2015 are classified in “i ncome from d iscontinued o perations ” on our consolidated statements of income . The financial results of UE and certain other retail assets are reflected in our consolidated financial statements as discontinued operations for a ll periods presented (see Note 7 – Dispositions for further details). In May 2014, the FASB issued an update ("ASU 2014-09") establishing ASC Topic 606, Revenue from Contracts with Customers . 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. ASU 2014-09 is effective for interim and annual reporting periods in fiscal years that begin after December 15, 2017. We are currently evaluating the impact of the adoption of ASU 2014-09 on our consolidated financial statements. In June 2014, the FASB issued an update (“ASU 2014-12”) to ASC Topic 718, Compensation – Stock Compensation . 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 begin after December 15, 2015. We are currently evaluating the impact of the adoption of ASU 2014-12 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. We are currently evaluating the impact of the adoption of ASU 2015-02 on our consolidated financial statements. In April 2015, the FASB issued an update (“ASU 2015-03”) Simplifying the Presentation of Debt Issuance Costs to ASC Topic 835, Interest (“ASC 835”). ASU 2015-03 requires that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability to which they relate, consistent with debt discounts, as opposed to being presented as assets. ASU 2015-03 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2015. We elected to early adopt ASU 2015-03 effective as of December 31, 2015 with retrospective application to our December 31, 2014 consolidating balance sheet. The effect of the adoption of ASU 2015-03 was to reclassify debt i ssuance costs of approximately $79 , 987 ,000 as of December 31, 2014 from “deferred leasing and financing costs , net ” to a contra account as a deduction from the related debt liabilities . There was no effect on our consolidated statements of income. In August 2015, the FASB issued an update (“ASU 2015-15”) Interest – Imputation of Interest to ASC 835. For debt issuance costs related to line-of-credit arrangements, ASU 2015-15 allows entities to present debt issuance costs as an asset and subsequently amortize the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. We elected to early adopt ASU 2015-15 effective as of December 31, 2015 with retrospective application to our December 31, 2014 balance sheet. These debt issuance costs were $ 7,720,000 and $11,549,000 as of December 31, 2015 and 2014, respectively, and are included as a component of “other assets”. 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 (“ASC 825”). 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. Real Estate: Real estate is carried at cost, net of accumulated depreciation and amortization. Betterments, major renewals and certain costs directly related to the improvement and leasing of real estate are capitalized. Maintenance and repairs are expensed as incurred. For redevelopment of existing operating properties, the net book value of the existing property under redevelopment plus the cost for the construction and improvements incurred in connection with the redevelopment are capitalized to the extent the capitalized costs of the property do not exceed the estimated fair value of the redeveloped property when complete. If the cost of the redeveloped property, including the net book value of the existing property, exceeds the estimated fair value of redeveloped property, the excess is charged to expense. Depreciation is recognized on a straight-line basis over estimated useful lives which range from 7 to 40 years. Tenant allowances are amortized on a straight-line basis over the lives of the related leases, which approximate the useful lives of the assets. Additions to real estate include interest and debt expense capitalized during construction of $ 59 , 305 ,000 and $ 6 2, 786 , 000 for the years ended December 31, 2015 and 2014, respectively . Upon the acquisition of real estate, we assess the fair value of acquired assets (including land, buildings and improvements, identified intangibles, such as acquire d above and below-market leases, acquired in-place leases and tenant relationships) and acquired liabilities and we allocate the purchase price based on these assessments. We assess fair value based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including historical operating results, known trends, and market/economic conditions. We record acquired intangible assets (including acquired above-market leases, acquired in-place leases and tenant relationships) and acquired intangible liabilities (including below–market leases) at their estimated fair value separate and apart from goodwill. We amortize identified intangibles that have finite lives over the period they are expected to contribute directly or indirectly to the future cash flows of the property or business acquired. Our properties, including any related intangible assets, are individually reviewed for impairment whenever events or changes in circumstances indicat e that the carrying amount may not be recoverable. An impairment exists when the carrying amount of an asset exceeds the aggregate projected future cash flows over the anticipated holding period on an undiscounted basis. An impairment loss is measured based on the excess of the property's carrying amoun t over its estimated fair value. Impairment analyses are based on our current plans, intended holding periods and available market information at the time the analyses are prepared. If our estimates of the projected future cash flows, anticipated holding periods, or market conditions change, our evaluation of impairment losses may be different and such differences could be material to our consolidated financial statements. The evaluation of anticipated cash flows is subjective and is based, in part, on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results. Plans to hold properties over longer periods decrease the likelihood of recording impairment losses. . Partially Owned Entities: We consolidate entities in which we have a controlling financial interest. In determining whether we have a controlling financial interest in a partially owned entity and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, authority to make decisions, and contractual and substantive participating rights of the partners/members as well as whether the entity is a variable interest entity (“VIE”) and we are the primary beneficiary. We are deemed to be the primary beneficiary of a VIE when we have ( i ) the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and (ii) the obligation to absorb losses or receive benefits that could potentially be significant to the VIE . We generally do not control a partially owned entity if the entity is not considered a VIE and the approval of all of the partners/members is contractually required with respect to major decisions, such as operating and capital budgets, the sale, exchange or other disposition of real property, the hiring of a chief executive officer, the commencement, compromise or settlement of any lawsuit, legal proceeding or arbitration or the placement of new or additional financing se cured by assets of the venture. We account for investments under the equity method when the requirements for consolidation are not met, and we have significant influence over the operations of the investee. Equity method investments are initially recorded at cost and subsequently adjusted for our share of net income or loss and cash contributions and distributions each period . Investments that do not qualify for consolidation or equity method accounting are acco unted for on the cost method. I nvestments in partially owned entities are reviewed for impairment whenever events or changes in circumstances indicat e that the carrying amount may not be recoverable. An impairment loss is measured based on the excess of the carrying amount of an investment over its estimated fair value. Impairment analyses are based on current plans , intended holding periods and available information at the time the analyses are prepared. In the years ended December 31, 2014 and 2013, we recognized non-cash impairment losses on investments in partially owned entities aggregating $ 85 , 459 ,000 and $ 281 , 098 ,000, respectively . Included in these amounts are $ 75 , 196 ,000 and $ 24 0, 7 57 ,000 of impairment losses related to our investment in Toys in 2014 and 2013 , respectively. Cash and Cash Equivalents: Cash and cash equivalents consist of highly liquid investments with original maturities of three months or less and are carried at cost, which approximates fair value due to their short-term maturities . The majority of our cash and cash equivalents consists of ( i ) deposits at major commercial banks , which may at times exceed the Federal Deposit Insurance Corporation limit , (ii) United States Treasury Bills, and (iii) Certificate of D eposits placed through an A ccount Registry S ervice (“CDARS”) . To date, we have not experienced any losses on our invested cash. Restricted Cash: Restricted cash consists of security deposits, cash restricted for the purpose s of facilitating a Section 1031 Like-Kind exchange, cash restricted in connection with our deferred compensation plan and cash escrowed under loan agreements for debt service, real estate taxes, property insurance and capital improvements . Allowance for Doubtful Accounts: We periodically evaluate the collectibility of amounts due from tenants and maintain an allowance for doubtful accounts for estimated losses resulting from the inability of tenants to make required payments under the lease agreements. We also maintain an allowance for receivables arising from the straight-lining of rents. This receivable arises from earnings recognized in excess of amounts currently due under the lease agreements. Management exercises judgment in establishing these allowances and considers payment history and current credit status in developing these estimates. As of December 31, 2015 and 2014, we had $11,908 ,000 and $12,210,000, respectively, in allowances for doubtful accounts. In addition, as of December 31, 2015 and 2014, we had $2,751 ,000 and $3,188,000, respectively, in allowances for receivables arising from the straight-lining of rents. Deferred Charges: Direct financing costs are deferred and amortized over the terms of the related agreements as a component of interest expense. Direct costs related to successful leasing activities are capitalized and amortized on a straight line basis over the lives of the related leases. All other deferred charges are amortized on a straight line basis, which approximates the effective interest rate method, in accordance with the terms of the agreements to which they relate. Revenue Recognition: We have the following revenue sources and revenue recognition policies: • Base Rent — income arising from tenant leases. These rents are recognized over the non-cancelable term of the related leases on a straight-line basis which includes the effects of rent steps and rent abatements under the leases. We commence rental revenue recognition when the tenant takes possession of the leased space and the leased space is substantially ready for its intended use. In addition, in circumstances where we provide a tenant improvement allowance for improvements that are owned by the tenant, we recognize the allowance as a reduction of rental revenue on a straight-line basis over the term of the lease. • Percentage Rent — income arising from retail tenant leases that is contingent upon tenant s ales exceeding defined threshold s . These rents are recognized only after the contingency has been removed (i.e., when tenant sales thresholds have been achieved). • Hotel Revenue — income arising from the operation of the Hotel Pennsylvania which consists of rooms revenue, food and beverage revenue, and banquet revenue. Income is recognized when rooms are occupied. Food and beverage and banquet revenue is recognized when the services have been rendered. • Trade Shows Revenue — income arising from the operation of trade shows, including rentals of booths. This revenue is recognized when the trade shows have occurred. • Expense Reimbursements — revenue arising from tenant leases which provide for the recovery of all or a portion of the operating expenses and real estate taxes of the respective property. This revenue is accrued in the same periods as the expenses are incurred. • Management, Leasing and Other Fees — income arising from contractual agreements with third parties or with partially owned entities. This revenue is recognized as the related services are performed under the respective agreement s. Derivative Instruments and Hedging Activities: ASC 815, Derivatives and Hedging , as amended, establishes accounting and reporting standards for derivative instruments, including certain derivative instruments embedded in other contracts, and for hedging activities. As of December 31, 2015 and 2014, our derivative instruments consisted of two and one interest rate swap s , respectively . We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. For derivatives designated as fair value hedges, changes in the fair value of the derivative and the hedged item related to the hedged risk are recognized in earnings. For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income (loss) (outside of earnings) and subsequently reclassified to earnings when the hedged transaction affects earnings, and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. We assess the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative hedging instrument with the changes in fair value or cash flows of the designated hedged item or transaction. For derivatives not designated as hedges, changes in fair value are recognized in earnings. Income Taxes: We operate in a manner intended to enable us to continue to qualify as a REIT under Sections 856 -860 of the Internal Revenue Code of 1986, as amended. Under those sections, a REIT which distributes at least 90% of its REIT taxable income as a dividend to its shareholders each year and which meets certain other conditions will not be taxed on that portion of its taxable income which is distributed to its shareholders. We distribute to our shareholders 100% of our taxable income and therefore, no provision for Federal income taxes is required. Dividends distributed for the year ended December 31, 2015, were characterized, for federal income tax purposes, as long-term capital gain income. Dividends distributed for the year s ended December 31, 2014 and 2013 , were characterized, for federal income tax purposes, as ordinary income . We have elected to treat certain consolidated subsidiaries, and may in the future elect to treat newly formed subsidiaries, as taxable REIT subsidiaries pursuant to an amendment to the Internal Revenue Code that became effective January 1, 2001. Taxable REIT subsidiaries may participate in non-real estate related activities and/or perform non-customary services for tenants and are subject to Federal and State income tax at regular corporate tax rates. Our taxable REIT subsidiaries had a combined current income tax expense of approximately $ 8 , 322 ,000 , $ 10,777 ,000 and $ 9,608 ,000 for the years ended December 31, 2015, 2014 and 2013 , respectively, and have immaterial differences between the financial reporting and tax basis of assets and liabilities. At December 31, 2015 and 2014 , our taxable REIT subsidiar ies had deferred tax assets related to n et operating loss carryforwards of $ 97 , 104 ,000 and $ 94,100 ,000 , respectively , which are included in “other assets” on our consolidated balance sheets. Prior to the quarter end ed June 30, 2015, there was a full val uation allowance against these deferred tax assets because we had not determined that it is more-likely-than-not that we would use the net operating loss carryforwards to offset future taxable income. In our quarter ended June 30, 2015, b ased upon residential condominium unit sales , among other factors, we concluded that it was more-likely-than-not that we will generate sufficient taxable income to realize the se deferred tax assets. Accordingly, we reversed $ 90,030,000 of the allowance for deferred tax assets and recognized an income tax benefit in our consolidated statements of income . The following table reconciles net income attributable to common shareholders to estimated taxable income for the years ended December 31, 2015, 2014 and 2013 . (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Net income attributable to common shareholders $ 679,856 $ 783,388 $ 392,034 Book to tax differences (unaudited): Tangible Property Regulations (1) (575,618) - - Sale of real estate and other capital transactions 320,326 (477,061) (324,936) Depreciation and amortization 227,297 219,403 155,401 Straight-line rent adjustments (144,727) (77,526) (64,811) Stock options (8,278) (9,566) 4,884 Earnings of partially owned entities (5,299) 71,960 339,376 Impairment losses on marketable equity securities - - 37,236 Other, net (5,833) 1,260 36,186 Estimated taxable income (unaudited) $ 487,724 $ 511,858 $ 575,370 (1) Represents one-time deductions pursuant to the implementation of the Tangible Property Regulations issued by the Internal Revenue Service. The net basis of our assets and liabilities for tax reporting purposes is approximately $ 3 . 4 billion lower than the amount s reported in our consolidated balance sheet at December 31, 2015 .

Real Estate Fund Investments

Real Estate Fund Investments	12 Months Ended
	Dec. 31, 2015
Real Estate Fund Investments [Abstract]
Real Estate Fund Investments	3 . 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. During the investment period, the Fund was our exclusive investment vehicle for all investments that fit within its investment parameters, as defined. 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. On June 26, 2014, the Fund sold its 64.7% interest in One Park Avenue to a newly formed joint venture that we and an institutional investor own 55% and 45%, respectively. This transaction was based on a property value of $560,000,000. From the inception of this investment through its disposition, the Fund realized a $75,529,000 net gain. On August 21, 2014, the Fund and its 50% joint venture partner completed the sale of The Shops at Georgetown Park, a 305,000 square foot retail property, for $272,500,000. From the inception of this investment through its disposition, the Fund realized a $51,124,000 net gain. On January 20, 201 5 , we co-invested with the Fund and one of the Fund's limited partners to buy out the Fund's joint venture partner's 57% interest in the Crowne Plaza Times Square Hotel (the “Co-Investment”) . The purchase price for the 57% interest was approximately $95,000,000 (our share $3 9 ,000,000) which valued the property at approximately $480,000,000. The property i s encumbered by a $310,000,000 mortgage loan bearing interest at LIBOR plus 2.80% and maturing in December 2018 with a one-year extension option. Our aggregate ownership interest in the property increased to 33% from 11% . The Co-Investment is also accounted for under ASC 946 and is included as a component of “real estate fund investments” on our consolidated balance sheet. On March 25 , 2015, the Fund completed the sale of 520 Broadway in Santa Monica, CA for $91,650,000. The Fund realized a $2 3 , 768 ,000 net gain over the holding period . At December 31, 201 5 , we had s ix real estate fund investments with an aggregate fair value of $ 5 74 , 761 ,000, or $ 208 , 614 ,000 in excess of cost, and ha d remaining unfunded commitments of $ 1 02 , 212 ,000 , of which our share was $ 25 , 553 , 00 0 . At December 31, 201 4 , we had seven real estate fund investments with an aggregate fair value of $ 513 , 973 ,000. Below is a summary of income from the Fund and the Co-Investment for the years ended December 31, 2015 , 2014 and 2013 . (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Net investment income $ 16,329 $ 12,895 $ 8,943 Net realized gains on exited investments 2,757 76,337 8,184 Net unrealized gains on held investments 54,995 73,802 85,771 Income from real estate fund investments 74,081 163,034 102,898 Less income attributable to noncontrolling interests (40,117) (92,728) (53,427) Income from real estate fund investments attributable to Vornado (1) $ 33,964 $ 70,306 $ 49,471 (1) Excludes $2,939, $2,562, and $2,721 of management and leasing fees in the years ended December 31, 2015, 2014 and 2013, respectively, which are included as a component of "fee and other income" on our consolidated statements of income.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2015
Acquisitions [Abstract]
Acquisitions	4 . Acquisitions On January 20, 2015, we and one of our real estate f und's limited partners co-invested with the Fund to buy out the Fund's joint venture partner's 57% interest in the Crowne Plaza Times Square Hotel (see Note 3 – Real Estate Fund Investments ). On March 18, 2015, we acquired the Center Building, a 437,000 square foot office building, located at 33-00 Northern Boulevard in Long Island City, New York, for $142,000,000, including the assumption of an existing $62,000,000, 4.43% mortgage maturing in October 2018. On June 2 , 2015, we completed the acquisition of 150 West 34th Street, a 78,000 square foot retail property leased to Old Navy through May 2019, and 226,000 square feet of additional zoning air rights, for approximately $355,000,000. At closing we completed a $205,000,000 financing of the property (see Note 9 – Debt ). On July 31, 2015, we acquired 260 Eleventh Avenue, a 235,000 square foot office property leased to the City of New York through 2021 with two five-year renewal options, a 10,000 square foot parking lot and additional air rights. The transaction is structured as a 99-year ground lease with an option to purchase the land for $110,000,000. The $3,900,00 0 a nnual ground rent and the purchase option price escalate annually at the lesser of 1.5% or CPI . The buildings were purchased for 813,900 newly issued Vornado Operating Partnership units valued at approximately $80,000,000. On September 25, 2015, we acquired 265 West 34th Street, a 1,700 square foot retail property and 15,200 square feet of additional zoning air rights , for approximately $28,500,000 .

Marketable Securities and Deriv

Marketable Securities and Derivative Instruments	12 Months Ended
	Dec. 31, 2015
Marketable Securities and Derivative Instruments [Abstract]
Marketable Securities and Derivative Instruments	5 . Marketable Securities and Derivative Instruments Our portfolio of marketable securities is comprised of equity securities that are classified as available - for - sale. Available - for - sale securities are presented on our consolidated balance sheets at fair value. Unrealized g ains and losses resulting from the mark-to-market of these securities are included in “other comprehensive income (loss) .” Realized g ains and losses are recognized in earnings only upon the sale of the securities and are recorded based on the weighted average cost of such securities . We evaluate our portfolio of marketable securities for impairment each reporting period. For each of the securities in our portfolio with unrealized losses, we review the underlying cause of the decline in value and the estimated recovery period, as well as the severity and duration of the decline. In our evaluation, we consider our ability and intent to hold these investments for a reasonable period of time sufficient for us to recover our cost basis. We also evaluate the near-term prospects for each of these investments in relation to the severity and duration of the decline. Below is a summary of our marketable securities portfolio as of December 31, 2015 and 2014. As of December 31, 2015 As of December 31, 2014 GAAP Unrealized GAAP Unrealized Fair Value Cost Gain Fair Value Cost Gain Equity securities: Lexington Realty Trust $ 147,752 $ 72,549 $ 75,203 $ 202,789 $ 72,549 $ 130,240 Other 3,245 - 3,245 3,534 - 3,534 $ 150,997 $ 72,549 $ 78,448 $ 206,323 $ 72,549 $ 133,774 During 2013 , we sold other marketable securities for aggregate proceeds of $ 44 , 209 ,000 , resulting in net gains of $ 3 1 , 741 ,000 , which are includ ed as a component of “net gain on disposition of wholly owned and partially owned asset s” on our consolidated statements of income.

Investments in Partially Owned

Investments in Partially Owned Entities	12 Months Ended
	Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Investments in Partially Owned Entities	6. In vestments in Partially Owned Entities Toys “R” Us (“Toys”) As of December 31, 2015, we own 32. 5 % of Toys . We account for our investment in Toys under the equity method and record our share of Toys ' net income or loss on a one-quarter lag basis because Toys' fiscal year ends on the Saturday nearest January 31, and our fi scal year ends on December 31. The business of Toys is highly seasonal and substantially all of Toys' net income is generated in its f ourth quarter . We have not guaranteed any of Toys' obligations and are not committed to provide any support to Toys. Pursuant to ASC 323-10-35-20, we discontinued applying the equity method for our Toys' investment when the carrying amount was reduced to zero in the third quarter of 2014. We will resume application of the equity method if , during the period the equity method was suspended , our share of unrecognized net income exceeds our share of unrecognized net losses. In the first quarter of 2014, we recognized our share of Toys' fourth quarter net income of $ 75,196,000 and a corresponding non-cash impairment loss of the same amount . In 2013, we recognized $240,757,000 of non-cash impairment losse s based on an “other-than- temporary ” decline in the fair value of our investment . Alexander's, Inc. (“Alexander's”) (NYSE: ALX) As of December 31, 2015, we own 1,654,068 Alexander's common shares, or approximately 32.4% of Alexander's common equity. We manage, lease and develop Alexander's properties pursuant to agreements which expire in March of each year a nd are automatically renewable. As of December 31, 2015 the market value (“fair value” pursuant to ASC 820) of our investment in Alexander's, based on Alexander's December 31, 2015 closing share price of $ 384 . 1 1 , was $ 635,345 , 00 0 , or $ 5 01 , 777 ,000 in excess of the carrying amount on our consolidated balance sheet. As of December 31, 2015 , 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 $ 40 , 340 ,000 . The majority of this basis difference resulted from the excess of our purchase price for the Alexander's common stock acquired over the book value of Alexander's net assets. Substantially all of this basis difference was allocated, based on our estimates of the fair values of Alexander's assets and liabilities, to real estate (land and buildings). We are amortizing the basis difference related to the buildings into earnings as additional depreciation expense over their estimated useful lives. This depreciation is not material to our share of equity in Alexander's net income. The basis difference related to the land will be recognized upon disposition of our investment. Management , Leasing and Development Agreements W e receive an annual fee for managing Alexander's and all of its properties equal to the sum of ( i ) $ 2 , 8 00,000 , (ii) 2 % of the gross revenue from the Rego Park II Shopping Center, (i ii ) $ 0.50 per square foot of the tenant-occupied office and retail spac e at 731 Lexington Avenue , and ( i v) $ 289 ,000 , escalating at 3 % per annum, for managing the common area of 731 Lexington Avenue. In addition, we are entitled to a development fee of 6 % of development costs, as defined . We provide Alexander's with leasing services for a fee of 3 % of rent for the first ten years of a lease term, 2 % of rent for the eleventh through twentieth year of a lease term and 1 % of rent for the twenty-first through thirtieth year of a lease term, subject to the payment of rents by Alexander's tenants. In the event third-party real estate brokers are used, our fee increases by 1 % and we are responsible for the fees to the third-parties. We are also entitled to a commission upon the sale of any of Alexander's assets equal to 3 % of gross proceeds, as defined, for asset sales less than $ 50,000,000 , and 1 % of gross proceeds, as defined, for asset sales of $50,000,000 or more. On December 22, 2014, the leasing agreements with Alexander's were amended to eliminate the annual installment cap of $ 4,000,000 . In addition, Alexander's repaid to us the outstanding balance of $ 40,353,000 . On January 15, 2015, we completed the spin-off of 79 strip shopping centers, three malls, a warehouse park and $225,000,000 of cash to UE and the transfer of all of the employees responsible for the management and leasing of those assets. In addition, we entered into agreements with UE to provide management and leasing services, on our behalf, for Alexander's Rego Park retail assets. Fees for these services are similar to the fees we are receiving from Alexander's described above. Other Agreements Building Maintenance Services (“BMS”), our wholly-owned subsidiary, supervises ( i ) cleaning, engineering and security services at Alexander's 731 Lexington Avenue property and (ii) security services at Alexander's Rego Park I and Rego Park II properties. During the years ended December 31, 2015, 2014 and 2013, we recognized $ 2,221,000 , $ 2,318,000 and $ 2,036,000 of income, respectively, for these services . Urban Edge Properties (“UE”) (NYSE: UE) As part of our spin-off of substantially all of our retail segment to UE on January 15, 2015 (see Note 1 – Organization and Business ), we retained 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. We are providing transition services to UE for an initial period of up to two years , primarily for 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 December 31, 2015 , the fair value of our investment in UE, based on UE's December 31, 2015 closing share price of $ 23 . 45 , was $1 34 , 068 ,000, or $ 108 , 717 ,000 in ex cess of the carrying amount on our consolidated balance sheet. Pennsylvania Real Estate Investment Trust (“PREIT”) (NYSE: PEI) On March 31, 2015, we transferred the redeveloped Springfield Town Center, a 1,350,000 square foot mall located in Springfield, Fairfax County, Virginia, to PREIT Associates, L.P., which is the operating partnership of PREIT , in exchange for $485,313,000; comprised of $340,000,000 of cash and 6,250,000 PREIT operating partnership units (valued at $145,313,000 or $23.25 per PREIT unit) (See Note 7 – D ispositions ). $19,000,000 of tenant improvements and allowances was credited to PREIT as a closing adjustment . As a result of this transaction, we own an 8.1% 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 December 31, 2015 , the fair value of our investment in PREIT, based on PREIT's December 31, 2015 closing share price of $ 21 . 87 , was $1 36 , 688 ,000, or $ 3 , 313 ,000 in excess of the carrying amount on our consolidated balance sheet. As of December 31, 2015, the carrying amount of our investment in PREIT exceeds our share of the equity in the net assets of PREIT by approximately $6 5 , 404 ,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 . 512 West 22 nd Street On June 24, 2015, we entered into a joint venture, in which we own a 55% interest, to develop a 173,000 square foot Class- A office building, located along the western edge of the High Line at 512 West 22nd Street. The development cost of this project is approximately $235,000,000. The development commenced during the fourth quarter of 2015 and is expected to be completed in 20 18. On November 24, 2015, the joint venture obtained a $126,000,000 construction loan. The loan matures in November 2019 with two six-month extension options. The interest rate is LIBOR plus 2.65% (3.07% at December 31, 2015). As of December 31, 2015, the outstanding balance of the loan was $44,072,000, of which $24,240,000 is our share. We account for our investment in the joint venture under the equity method. Below is a summary of our i nvestments in partially owned entities . (Amounts in thousands) Percentage Ownership at As of December 31, December 31, 2015 2015 2014 Investments: Partially owned office buildings (1) Various $ 909,782 $ 760,749 Alexander’s 32.4 % 133,568 131,616 PREIT 8.1 % 133,375 - India real estate ventures 4.1%-36.5% 48,310 76,752 UE 5.4 % 25,351 - Toys (2) 32.5 % - - Other investments (3) Various 300,036 271,372 $ 1,550,422 $ 1,240,489 (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) Pursuant to Rule 4-08(g) of Regulation S-X, in 2014 Toys was considered a significant subsidiary where as in 2015 it was not. As of November 1, 2014, Toys had total assets of $11,267,000, total liabilities of $10,377,000, noncontrolling interests of $82,000 and equity of $808,000. (3) Includes interests in Independence Plaza, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street and others. Below is a summary of our income (loss) from partially owned entities. (Amounts in thousands) Percentage Ownership at For the Year Ended December 31, December 31, 2015 2015 2014 2013 Our Share of Net (Loss) Income: Alexander's: Equity in net income 32.4 % $ 24,209 $ 21,287 $ 17,721 Management, leasing and development fees 6,869 8,722 6,681 31,078 30,009 24,402 UE (see page 109 for details): Equity in net earnings 5.4 % 2,430 - - Management fees 1,964 - - 4,394 - - Toys: Equity in net loss (1) 32.5 % - (4,691) (128,919) Non-cash impairment losses (see page 108 for details) - (75,196) (240,757) Management fees 2,500 6,331 7,299 2,500 (73,556) (362,377) Partially owned office buildings (2) Various (23,556) 93 (4,212) India real estate ventures (3) 4.1%-36.5% (18,746) (8,309) (3,533) PREIT (see page 109 for details) 8.1 % (7,450) - - LNR (4) n/a - - 18,731 Lexington (5) n/a - - (979) Other investments (6) Various (850) (8,098) (12,914) $ (12,630) $ (59,861) $ (340,882) (1) Pursuant to Rule 4-08(g) of Regulation S-X, in 2014 and 2013 Toys was considered a significant subsidiary where as in 2015 it was not. For the twelve months ended November 1, 2014, Toys’ total revenue was $12,645,000 and net loss attributable to Toys was $343,000. For the twelve months ended November 2, 2013, Toys’ total revenue was $13,046,000 and net loss attributable to Toys was $396,000. (2) 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. In 2015, we recognized net losses of $39,600 from our 666 Fifth Avenue (Office) joint venture as a result of our share of depreciation expense. Also in 2015, we recognized our $12,800 share of a write-off of a below market lease liability related to a tenant vacating at 650 Madison Avenue. In 2014, we recognized our $14,500 share of accelerated depreciation from our West 57th Street joint ventures in connection with the change in estimated useful life of those properties. (3) Includes a $14,806 and $5,771 non-cash impairment loss in 2015 and 2014, respectively. (4) In 2013, we recognized net income of $18,731, comprised of (i) $42,186 for our share of LNR’s net income and (ii) a $27,231 non-cash impairment loss and (iii) a $3,776 net gain on sale. (5) In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable security - available for sale. (6) Includes interests in Independence Plaza, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street and others. In 2014, we recognized a $10,263 non-cash charge, comprised of a $5,959 impairment loss and a $4,304 loan loss reserve, on our equity and debt investments in Suffolk Downs. Below is a summary of the debt of our partially ow ned entities as of December 31, 2015 and 2014 , none of which is recourse to us. (Amounts in thousands) Percentage Interest Ownership at Rate at 100% Partially Owned Entities’ December 31, December 31, Debt at December 31, 2015 Maturity 2015 2015 2014 Toys: Notes, loans and mortgages payable 32.5 % 2016-2021 7.35 % $ 5,619,710 $ 5,748,350 Partially owned office buildings (1) : Mortgages payable Various 2016-2023 5.57 % $ 3,771,255 $ 3,691,274 PREIT: Mortgages payable 8.1 % 2016-2025 4.04 % $ 1,852,270 $ - UE: Mortgages payable 5.4 % 2018-2034 4.15 % $ 1,246,155 $ - Alexander's: Mortgages payable 32.4 % 2016-2022 1.69 % $ 1,053,262 $ 1,032,780 India Real Estate Ventures: TCG Urban Infrastructure Holdings mortgages payable 25.0 % 2016-2026 12.06 % $ 185,607 $ 183,541 Other (2) : Mortgages payable Various 2016-2023 4.27 % $ 1,316,641 $ 1,314,077 (1) Includes 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue, 512 West 22nd Street and others. (2) Includes Independence Plaza, Fashion Center Mall, 50-70 West 93rd Street and others. Based on our ownership interest in the partially owned entities above, our pro rata share of the debt of these partially owned entities , was $ 4 , 432 , 078 ,000 a nd $ 4 , 1 9 0 , 428 ,000 as of December 31, 2015 and 2014, respectively . Summary of Condensed Combined Financial Information The following is a summary of condensed combined financial information for all of our partially owned entities, including Toys and Alexander's , as of December 31, 2015 and 2014 and for the years ended December 31, 2015, 2014 and 2013. (Amounts in thousands) Balance as of December 31, 2015 2014 Balance Sheet: Assets $ 25,526,000 $ 21,389,000 Liabilities 21,162,000 17,986,000 Noncontrolling interests 146,000 104,000 Equity 4,218,000 3,299,000 For the Year Ended December 31, 2015 2014 2013 Income Statement: Total revenue $ 13,423,000 $ 13,620,000 $ 14,092,000 Net loss (224,000) (434,000) (368,000)

Dispositions

Dispositions	12 Months Ended
	Dec. 31, 2015
Dispositions [Abstract]
Dispositions	7 . Dispositions 2015 Activity : New York On December 22, 2015, we completed the sale of 20 Broad Street, a 473,000 square foot office building in Manhattan for an aggregate consideration of $200,000,000. The total income from this transaction was approximately $157,000,000 comprised of approximately $142,000,000 from the gain on sale and $15 ,000,000 of lease termination income set forth in N ote 15 – Fee and Other Income . Washington, DC On September 9, 2015, we completed the sale of 1750 Pennsylvania Avenue, NW, a 278,000 square foot office building in Washington, DC for $182,000,000, resulting in a net gain of approximately $102,000,000 which is included in “net gain on disposition of wholly owned and partially owned assets” on our consolidated statement of income. The tax gain of approximately $137,000,000 was deferred as part of a like-kind exchange. We are managing the property on behalf of the new owner. Discontinued Operations On January 15, 2015, we completed the spin-off of substantially all of our retail segment comprised of 79 strip shopping centers, three malls, a warehouse park and $225,000,000 of cash to UE (NYSE: UE) (see Note 1 – Organization and Business ). In addition, we completed the following retail property sales, substantially completing the exit of the retail strips and malls business. On March 13, 2015, we sold our Geary Street, CA lease for $34,189,000, which resulted in a net gain of $21,376,000. On March 31, 2015, we transferred the redeveloped Springfield Town Center, a 1,350,000 square foot mall located in Springfield, Fairfax County, Virginia, to PREIT (see Note 6 – Investments in Partially Owned Entities ). The financial statement gain was $7,823,000, of which $7,192,000 was recognized in the first quarter of 2015 and the remaining $631,000 was deferred based on our ownership interest in PREIT. On March 31, 2018, we will be entitled to additional consideration of 50% of the increase in the value of Springfield Town Center, if any, over $465,000,000, calculated utilizing a 5.5% capitalization rate. In the first quarter of 2014, we recorded a non-cash impairment loss of $20,000,000 on Springfield Town Center which is included in “income from discontinued operations” on our consolidated statements of income. On August 6, 2015, we sold our 50% interest in the Monmouth Mall in Eatontown, NJ to our joint venture partner for $38,000,000, valuing the property at approximately $229,000,000, which resulted in a net gain of $33,153,000. We also sold five residual retail properties, in separate transactions, for an aggregate of $10,731,000, which resulted in net gains of $3,675,000. 2014 Activity : New York On December 18, 2014, we completed the sale of 1740 Broadway, a 601,000 square foot office building in Manhattan for $605,000,000. The sale resulted in net proceeds of approximately $580,000,000, after closing costs, and resulted in a financial statement gain of approximately $441,000,000. The tax gain of approximately $ 484,000,000, was deferred in like-kind exchanges, primarily for the acquisition of the St. Regis Fi fth Avenue retail . Discontinued Operations On February 24, 2014, we completed the sale of Broadway Mall in Hicksville, Long Island, New York, for $94,000,000. The sale resulted in net proceeds of $92,174,000 after closing costs. On March 2, 2014, we entered into an agreement to transfer upon completion, the redeveloped Springfield Town Center, a 1,350,000 square foot mall located in Springfield, Fairfax County, Virginia, to PREIT in exchange for $4 85 , 313 ,000 ; comprised of $340,000,000 of cash and 6 , 250 ,000 of PREIT operating partnership units (value d at $145,313,000 or $23.25 per PREIT unit) . In connection therewith, we recorded a non-cash impairment loss of $20,000,000, which is included in “income from discontinued operations” on our consolidated statements of income . On July 8, 2014, we completed the sale of Beverly Connection, a 335,000 square foot power shopping center in Los Angeles, California, for $260,000,000, of which $239,000,000 was cash and $21,000,000 was 10-year mezzanine seller financing. The sale resulted in a net gain of $44,155,000. W e also sold six of the 2 2 strip shopping centers which did not fit UE's strategy (see Note 1 – Organization and Business ), in separate transactions, for an aggregate of $ 66 , 410 ,000 in cash, which resulted in a net gain aggregating $ 22 , 500 ,000. 2013 Activity : New York On December 17, 2013, we sold 866 United Nations Plaza, a 360,000 square foot office building in Manhattan for $200,000,000. The sale resulted in net proceeds of $146,439,000 after repaying the existing loan and closing costs, and a net gain of $ 127,512,000 . Discontinued Operations On January 24, 2013, we sold the Green Acres Mall located in Valley Stream, New York, for $500,000,000. The sale resulted in net proceeds of $185,000,000 after repaying the existing loan and closing costs, and a net gain of $202,275,000. On April 15, 2013, we sold The Plant, a power strip shopping center in San Jose, California, for $203,000,000. The sale resulted in net proceeds of $98,000,000 after repaying the existing loan and closing costs, and a net gain of $32,169,000. On April 15, 2013, we sold a retail property in Philadelphia, which is a part of the Gallery at Market Street, for $60,000,000. The sale resulted in net proceeds of $58,000,000 , and a net gain of $33,058,000. On September 23, 2013, we sold a retail property in Tampa, Florida for $45,000,000, of which our 75% share was $33,750,000. Our share of the net proceeds after repaying the existing loan and closing costs were $20,810,000, and our share of the net gain was $8,728,000. W e also sold 12 other properties, in separate transactions, for an aggregate of $82,300,000, in cash, which resulted in a net gain aggregating $7,851,000 . In accordance with the provisions of ASC 360, Property, Plant, and Equipment , we have reclassified the revenues and expenses of all of the properties discussed above to “income from discontinued operations” and the related assets and liabilities to “assets related to discontinued operations” and “liabilities related to discontinued operations” for all of the periods presented in the accompanying financial statements. The net gains resulting from the sale of the se properties are included in “income from discontinued operations” on our consolidated statements of income . The tables below set forth the assets and liabilities related to discontinued operations at December 31, 2015 and 2014, and their combined results of operations for the years ended December 31, 2015, 2014 and 2013 . (Amounts in thousands) Balance as of December 31, 2015 December 31, 2014 Assets related to discontinued operations: Real estate, net $ 29,561 $ 2,028,677 Other assets 7,459 205,451 $ 37,020 $ 2,234,128 Liabilities related to discontinued operations: Mortgages payable, net $ - $ 1,278,182 Other liabilities (primarily deferred revenue in 2014) 12,470 222,827 $ 12,470 $ 1,501,009 (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Income from discontinued operations: Total revenues $ 27,831 $ 395,786 $ 502,061 Total expenses 17,651 274,107 310,364 10,180 121,679 191,697 Net gains on sales of real estate 65,396 507,192 414,502 Transaction related costs (primarily UE spin off) (22,972) (14,956) - Impairment losses (256) (26,518) (37,170) Net gain on sale of asset other than real estate - - 1,377 Pretax income from discontinued operations 52,348 587,397 570,406 Income tax expense (86) (1,721) (2,311) Income from discontinued operations $ 52,262 $ 585,676 $ 568,095 Cash flows related to discontinued operations: Cash flows from operating activities $ (33,462) $ 123,837 $ 279,436 Cash flows from investing activities 346,865 (180,019) (117,497)

Identified Intangible Assets an

Identified Intangible Assets and Liabilities	12 Months Ended
	Dec. 31, 2015
Identified Intangible Assets and Liabilities [Abstract]
Identified Intangible Assets and Liabilities	8 . Identified Intangible Assets and Liabilities The following summarizes our identified intangible assets (primarily acquired above-market leases) and liabilities (primarily acquired below-market leases) as of December 31, 2015 and 2014. (Amounts in thousands) Balance as of December 31, 2015 2014 Identified intangible assets: Gross amount $ 415,261 $ 424,976 Accumulated amortization (187,360) (199,821) Net $ 227,901 $ 225,155 Identified intangible liabilities (included in deferred revenue): Gross amount $ 643,488 $ 657,976 Accumulated amortization (325,340) (329,775) Net $ 318,148 $ 328,201 Amortization of acquired below-market leases, net of acquired above-market leases , resulted in an increase to rental income of $ 78 , 749 ,000 , $ 37,516 ,000 and $ 41,970 ,000 for the years ended December 31, 2015, 2014 and 2013, 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, 2016 is as follows: (Amounts in thousands) 2016 $ 52,359 2017 44,501 2018 43,028 2019 31,011 2020 23,320 Amortization of all other identified intangible assets (a component of depreciation and amortization expense) was $ 36 , 659 ,000 , $ 28,275 ,000 and $ 61,915 ,000 for the years ended December 31, 2015, 2014 and 2013, 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, 2016 is as follows: (Amounts in thousands) 2016 $ 29,349 2017 24,427 2018 20,063 2019 15,779 2020 12,345 We are a tenant under ground leases at certain properties. Amortization of these acquired below-market leases , net of above-market leases , resulted in an increase to rent expense of $ 1 , 832 ,000 , $ 1,832 ,000 , and $ 2,745,000 for the years ended December 31, 2015 , 2014 and 2013 . Estimated an nual amortization of these below-market leases , net of above-market leases , for each of the five succeeding years commencing January 1, 2016 is as follows: (Amounts in thousands) 2016 $ 1,832 2017 1,832 2018 1,832 2019 1,832 2020 1,832

Debt

Debt	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Debt	9 . Debt Secured Debt On April 1, 2015, we completed a $308,000,000 refinancing of RiverHouse Apartments, a three building, 1,670 unit rental complex located in Arlington, VA. The loan is interest only at LIBOR plus 1.28% (1.52 % at December 31, 2015) and matures in 2025. We realized net proceeds of approximately $43,000,000. The property was previously encumbered by a 5.43%, $195,000,000 mortgage maturing in April 2015 and a $64,000,000 mortgage at LIBOR plus 1.53% maturing in 2018. On June 2, 2015, we completed a $205,000,000 financing in connection with the acquisition of 150 West 34 th Street (see Note 4 – Acquisitions ). The loan bears interest at LIBOR plus 2.25% (2.52 % at December 31, 2015) and matures in 2018 with two one-year extension options. On July 28, 2015, we completed a $580,000,000 refinancing of 100 West 33rd Street, a 1.1 million square foot property comprised of 85 5 ,000 square feet of office space and the 256,000 square foot Manhattan Mall. The loan is interest only at LIBOR plus 1.65% (1.92 % at December 31, 2015) and matures in July 2020. We realized net proceeds of approximately $242,000,000. On September 22, 2015, we upsized the loan on our 220 Central Park South development by $350,000,000 to $950,000,000. The interest rate on the loan is LIBOR plus 2.00% (2.42 % at December 31, 2015) and the final maturity date is 2020. In connection with the upsizing, the standby commitment for a $500,000,000 mezzanine loan for this development has been terminated by payment of a $15,000,000 contractual termination fee, which was capitalized as a component of “development costs and construction in progress” on our consolidated balance sheet as of December 3 1 , 2015. On December 11 , 2015, we completed a $375,000,000 refinancing of 888 Seventh Avenue, a 882,000 square foot Manhattan office building. The five-year loan is interest only at LIBOR plus 1.60% (1.92 % at December 31, 2015) which was swapped for the term of the loan to a fixed rate of 3.15% and matures in December 2020 . We realized net proceeds of approximately $49,000,000. On December 21 , 2015, we completed a $450,000,000 financing of the retail condominium of the St. Regis Hotel and the adjacent retail town house located on Fifth Avenue at 55th Street. The loan matures in December 2020, with two one-year extension options. The loan is interest only at LIBOR plus 1.80 % (2.19 % at December 31, 2015) for the first three years, LIBOR plu s 1.90% for years four and five, and LIBOR plus 2.00% during the extension periods. We own a 74.3% controlling interest in the joint venture which owns the property. Senior Unsecured Notes On January 1, 2015, we redeemed all of the $500,000,000 principal amount of our outstanding 4.25% senior unsecured notes, which were scheduled to mature on April 1, 2015, at a redemption price of 100% of the principal amount plus accrued interest through December 31, 2014. Unsecured Term Loan On October 30, 2015, we entered into an unsecured delayed-draw term loan facility in the maximum amount of $750,000,000. The facility matures in October 2018 with two one-year extension options. The interest rate is LIBOR plus 1.15% (1.40 % at December 31, 2015) with a fee of 0.20% per annum on the unused portion. At closing, we drew $187,500,000. The facility provides that the maximum amount available is twice the amount outstanding on April 29, 2016, limited to $750,000,000, and all draws must be made by October 2017. This facility , together with the $950,000,000 development loan mentioned above , provides the funding for our 220 Central Park South development. The following is a summary of our debt: (Amounts in thousands) Weighted Average Interest Rate at Balance at December 31, December 31, 2015 2015 2014 Mortgages Payable: Fixed rate 4.29 % $ 6,356,634 $ 6,497,286 Variable rate 2.14 % 3,258,204 1,763,769 Total 3.56 % 9,614,838 8,261,055 Deferred financing costs, net and other (101,125) (73,212) Total, net $ 9,513,713 $ 8,187,843 Unsecured Debt: Senior unsecured notes 3.68 % $ 850,000 $ 1,350,000 Deferred financing costs, net and other (5,841) (7,506) Senior unsecured notes, net 844,159 1,342,494 Unsecured term loan 1.40 % 187,500 - Deferred financing costs, net and other (4,362) - Unsecured term loan, net 183,138 - Unsecured revolving credit facilities 1.38 % 550,000 - Total, net $ 1,577,297 $ 1,342,494 The net carrying amount of properties collateralizing the m ortgages payable amounted to $ 9 . 6 billion at December 31, 2015 . As of December 31, 2015 , the principal repayments required for the next five years and there after are as follows: (Amounts in thousands) Senior Unsecured Debt and Unsecured Revolving Credit Mortgages Payable Facilities Year Ending December 31, 2016 $ 1,095,366 $ 550,000 2017 411,113 - 2018 441,354 - 2019 379,122 450,000 2020 2,835,451 187,500 Thereafter 4,452,432 400,000

Redeemable Noncontrolling Inter

Redeemable Noncontrolling Interests	12 Months Ended
	Dec. 31, 2015
Redeemable Noncontrolling Interests [Abstract]
Redeemable Noncontrolling Interests	10 . Redeemable Noncontrolling Interests Redeemable noncontrolling interests on our consolidated balance sheets are primarily comprised 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. Class A units may be tendered for redemption to the Operating Partnership for cash; we, at our option, may assume that obligation and pay the holder either cash or Vornado common shares on a one-for-one basis. Because the number of Vornado common shares outstanding at all times equals the number of Class A units owned by Vornado, the redemption value of each Class A unit is equivalent to the market value of one Vornado common share, and the quarterly distribution to a Class A unitholder is equal to the quarterly dividend paid to a Vornado common shareholder. Below are the details of redeemable noncontrolling interests as of December 31, 2015 and 2014 . (Amounts in thousands, except units and Preferred or per unit amounts) Balance as of Units Outstanding at Per Unit Annual December 31, December 31, Liquidation Distribution Unit Series 2015 2014 2015 2014 Preference Rate Common: Class A $ 1,223,793 $ 1,336,780 12,242,820 11,356,550 n/a $ 2.52 Perpetual Preferred: (1) 5.00% D-16 Cumulative Redeemable $ 1,000 $ 1,000 1 1 $ 1,000,000.00 $ 50,000.00 3.25% D-17 Cumulative Redeemable $ 4,428 $ - 177,100 - $ 25.00 $ 0.8125 (1) Holders may tender units for redemption to the Operating Partnership for cash at their stated redemption amount; we, at our option, may assume that obligation and pay the holders either cash or Vornado preferred shares on a one-for-one basis. These units are redeemable at our option at any time. Below is a table summarizing the activity of redeemable noncontrolling interests. (Amounts in thousands) Balance at December 31, 2013 $ 1,003,620 Net income 47,613 Other comprehensive income 1,323 Distributions (33,469) Redemption of Class A units for common shares, at redemption value (27,273) Adjustments to carry redeemable Class A units at redemption value 315,276 Other, net 30,690 Balance at December 31, 2014 1,337,780 Net income 43,231 Other comprehensive income (2,866) Distributions (30,263) Redemption of Class A units for common shares, at redemption value (48,230) Adjustments to carry redeemable Class A units at redemption value (192,464) Issuance of Class A units 80,000 Issuance of Series D-17 Preferred Units 4,428 Other, net 37,605 Balance at December 31, 2015 $ 1,229,221 Redeemable noncontrolling interests exclude our Series G -1 through G-4 c onvertible p referred units and Series D-13 c umulative r edeemable p referred 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 $ 5 0 , 561 , 000 and $ 55,097,000 as of December 31, 2015 and 2014 , respectively . Changes in the value from period to period, if any, are charged to “interest and debt expense” on our consolidated statements of income .

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2015
Shareholders' Equity [Abstract]
Shareholders' Equity	11. Shareholder s' Equity Common Shares As of December 31, 2015 , there were 18 8 , 576 , 853 common shares outstanding. During 2015 , we paid an aggregate of $ 474 , 751 ,000 of common dividends comprised of quarterly common dividends of $ 0. 63 per share. Preferred Shares The following table sets forth the details of our preferred shares of beneficial interest as of December 31, 2015 and 2014 . (Amounts in thousands, except share and Balance as of Shares Outstanding at Per Share Annual per share amounts) December 31, December 31, Liquidation Dividend Preferred Shares 2015 2014 2015 2014 Preference Rate (1) Convertible Preferred: 6.5% Series A: authorized 83,977 shares (2) $ 1,321 $ 1,393 26,629 28,939 $ 50.00 $ 3.25 Cumulative Redeemable: 6.625% Series G: authorized 8,000,000 shares (3) 193,135 193,135 8,000,000 8,000,000 $ 25.00 $ 1.65625 6.625% Series I: authorized 10,800,000 shares (3) 262,379 262,379 10,800,000 10,800,000 $ 25.00 $ 1.65625 6.875% Series J: authorized 9,850,000 shares (3) 238,842 238,842 9,850,000 9,850,000 $ 25.00 $ 1.71875 5.70% Series K: authorized 12,000,000 shares (3) 290,971 290,971 12,000,000 12,000,000 $ 25.00 $ 1.425 5.40% Series L: authorized 12,000,000 shares (3) 290,306 290,306 12,000,000 12,000,000 $ 25.00 $ 1.35 $ 1,276,954 $ 1,277,026 52,676,629 52,678,939 (1) Dividends on preferred shares are cumulative and are payable quarterly in arrears. (2) Redeemable at our option under certain circumstances, at a redemption price of 1.5934 and 1.4334 common shares per Series A Preferred Share plus accrued and unpaid dividends through the date of redemption, or convertible at any time at the option of the holder for 1.5934 and 1.4334 common shares per Series A Preferred Share, as of December 31, 2015 and 2014, respectively. (3) Redeemable at our option at a redemption price of $25.00 per share, plus accrued and unpaid dividends through the date of redemption. Accumulated Other Comprehensive Income (Loss) The following tables set forth the changes in accumulated other comprehensive income (loss) by component. (Amounts in thousands) For the Year Ended December 31, 2015 Securities Pro rata share of Interest available- nonconsolidated rate Total for-sale subsidiaries' OCI swap Other Balance as of December 31, 2014 $ 93,267 $ 133,774 $ (8,992) $ (25,803) $ (5,712) Net current period OCI (46,346) (55,326) (327) 6,435 2,872 Balance as of December 31, 2015 $ 46,921 $ 78,448 $ (9,319) $ (19,368) $ (2,840)

Variable Interest Entities ("VI

Variable Interest Entities ("VIEs")	12 Months Ended
	Dec. 31, 2015
Variable Interest Entities [Abstract]
Variable Interest Entities ("VIEs")	12. Variable Interest Entit i es (“VIEs”) Unconsolidated VIEs As of December 31, 2015 and 2014 , we have six and three unconsolidated VIEs , respectively . We do not consolidate these entities because we are not the primary beneficia ry 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 in vestment in these entities under the equity method (see Note 6 – Investments in Partially Owned Entities ). As of December 31 , 2015 and 2014 , the net carrying amount of our investment s in these entities w as $ 3 79 , 939 ,000 a nd $ 286,783 ,000 , respectively , and o ur maximum exposure to loss in these entities, is limited to our investment s . We did not have any consolidated VIEs as of December 31, 2015 and 2014 .

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	13 . 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 redeema ble preferred units), and (v) interest rate swap s . The tables below aggregate the fair values of these financial assets and liabilities by their levels in the fair value hierarchy at December 31, 2015 and 2014, respectively. (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 (75% of which is attributable to noncontrolling interests) 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 $ - (Amounts in thousands) As of December 31, 2014 Total Level 1 Level 2 Level 3 Marketable securities $ 206,323 $ 206,323 $ - $ - Real estate fund investments (75% of which is attributable to noncontrolling interests) 513,973 - - 513,973 Deferred compensation plan assets (included in other assets) 117,284 53,969 - 63,315 Total assets $ 837,580 $ 260,292 $ - $ 577,288 Mandatorily redeemable instruments (included in other liabilities) $ 55,097 $ 55,097 $ - $ - Interest rate swap (included in other liabilities) 25,797 - 25,797 - Total liabilities $ 80,894 $ 55,097 $ 25,797 $ - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis - continued Real Estate Fund Investments At December 31, 2015 , we had six real estate fund investments with an aggregate fair value of $ 574 , 761 ,000 , or $ 208 , 614 ,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 5 . 0 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 f und investments at December 31, 2015 . Weighted Average (based on fair Unobservable Quantitative Input Range value of investments) Discount rates 12.0% to 14.9% 13.6% Terminal capitalization rates 4.8% to 6.1% 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 th e changes in the fair value of real estate f und investments that are classified as Level 3, for the years ended December 31, 2015 and 2014 . (Amounts in thousands) For The Year Ended December 31, 2015 2014 Beginning balance $ 513,973 $ 667,710 Purchases 95,010 3,392 Dispositions / Distributions (91,450) (307,268) Net unrealized gains 54,995 73,802 Net realized gains 2,757 76,337 Other, net (524) - Ending balance $ 574,761 $ 513,973 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 th e changes in the fair value of deferred compensation plan a ssets that are classified as Level 3, for the years ended December 31, 2015 and 2014. (Amounts in thousands) For The Year Ended December 31, 2015 2014 Beginning balance $ 63,315 $ 68,782 Purchases 9,062 14,162 Sales (13,252) (24,951) Realized and unrealized gains (501) 3,415 Other, net 562 1,907 Ending balance $ 59,186 $ 63,315 Fair Value Measurements on a Nonrecurring Basis Assets measured at fair value on a nonrecurring basis on our consolidated balance sheets consist primarily of real estate assets required to be measured for impairment at December 31, 2014 . There are no assets measured at fair value on a nonrecurring basis at December 31 , 2015. The fair values of real estate assets required to be measured for impairment were determined using widely accepted valuation techniques, including ( i ) discounted cash flow analysis, which considers, among other things, leasing assumptions, growth rates, discount rates and terminal capitalization rates, (ii) income capitalization approach, which considers prevailing market capitalization rates, and (iii) comparable sales activity . (Amounts in thousands) As of December 31, 2015 Total Level 1 Level 2 Level 3 Real estate assets $ - $ - $ - $ - (Amounts in thousands) As of December 31, 2014 Total Level 1 Level 2 Level 3 Real estate assets $ 4,848 $ - $ - $ 4,848 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), mezzanine loan receivable 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 und er our unsecured revolving credit facilities and unsecured term loan are classified as Level 1, and the fair v alue of our mezzanine loan receivable as of December 31, 2014 is classified as Level 3. There are no mezzanine loans outstanding as of December 31 , 2015. 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 December 31, 2015 and 2014. (Amounts in thousands) As of December 31, 2015 As of December 31, 2014 Carrying Fair Carrying Fair Amount Value Amount Value Cash equivalents $ 1,295,980 $ 1,296,000 $ 749,418 $ 749,000 Mezzanine loan receivable (included in other assets) - - 16,748 17,000 $ 1,295,980 $ 1,296,000 $ 766,166 $ 766,000 Debt: Mortgages payable $ 9,614,838 $ 9,306,000 $ 8,261,055 $ 8,224,000 Senior unsecured notes 850,000 868,000 1,350,000 1,385,000 Unsecured term loan 187,500 187,500 - - Unsecured revolving credit facilities 550,000 550,000 - - Total $ 11,202,338 $ 10,911,500 $ 9,611,055 $ 9,609,000

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2015
Stock-based Compensation [Abstract]
Stock-based Compensation	14 . Stock-based Compensation Our Omnibus Share Plan (the “Plan”), which was approved in May 2010, provides the Compensation Committee of the Board (the “Committee”) the ability to grant incentive and non-qualified stock options, restricted stock, restricted Operating Partnership u nits and out-performance plan a wards to certain of our employees and officers . Under the Plan, a wards may be granted up to a maximum of 6,000,000 shares, if all awards granted are Full Value Awards, as defined, and up to 12,000,000 shares, if all of the awards granted are No t Full Value Awards, as defined, plus shares in respect of awards forfeited after May 2010 that were issued pursuant to our 2002 Omnibus Share Plan. Full Value Awards are awards of securities, such as restricted s hares , that, if all vesting requirements are met, do not require the payment of an exercise price or strike price to acquire the securities. Not Full Value Awards are awards of securities, such as options, that do require the payment of an exercise price or strike price. This means, for example, if the Committee were to award only restricted s hares , it could award up to 6,000,000 restricted shares. On the other hand, if the Committee were to award only stock options, it could award options to purchase up to 12,000,000 shares (at the applicable exercise price). The Committee may also issue any combination of awards under the Plan, with reductions in availability of future awards made in accordance with the above limitations. As of December 31, 2015, we have approximately 3 , 570 ,000 shares available for future grants under the Plan, if all awards granted are Full Value Awards, as defined. In the years ended December 31, 2015 , 2014 and 2013 , we recognized an aggreg ate of $ 3 9 , 8 4 6 ,000, $ 3 6 , 641 ,000 and $ 3 4 , 914 ,000, respectively, of stock-based compensation expense, which is included as a component of “general and administrative ” expenses on our consolidated statement s of income. The year ended December 31, 2015 includes $ 7 , 834 ,000 from the acceleration of the recognition of compensation expense related to 2013-2015 Out-Performance Plans due to the modification of the vesting criteria of awards such that they will fully vest at age 65. The accelerated expense will result in lower general and administrative expense for 2016 of $ 3 , 679 ,000 and $ 4 , 155 ,000 thereafter. The details of the various components of our stock-based compensation are discussed below. Out-Performance Plans (“ the OPPs”) OPPs are multi-year, performance-based equity compensation plans under which participants, including our Chairman and Chief Executive Officer, have the opportunity to earn a class of units (“OPP units”) of the Operating Partnership if, and only if, we outperform a predetermined total shareholder return (“TSR”) and/or outperform the market with respect to a relative TSR in any year during the requisite performan ce periods as described below. OPP units, if earned, become convertible into Class A common units of the Operating Partnership (and ultimately into shares) following vesting. Awards under the 2012 and 2013 OPP have been earned . Awards under the 2014 and 2015 OPP may be earned if we ( i ) achieve a TSR level greater than 7% per annum, or 21% over the three-year performance measurement period s (the “Absolute Component”), and/or (ii) achieve a TSR above that of the Index over the three-year performance measurement period s (the “Relative Component”). To the extent awards would be earned under the Absolute Component of each of the OPPs, but we underperform the Index, such awards would be reduced (and potentially fully negated) based on the degree to which we underperform the Index. In certain circumstances, in the event we outperform the Index but awards would not otherwise be fully earned under the Absolute Component, awards may still be earned or increased under the Relative Component. To the extent awards would otherwise be earned under the Relative Component but we fail to achieve at least a 6% per annum absolute TSR, such awards earned under the Relative Component would be reduced based on our absolute TSR, with no awards being earned in the event our TSR during the applicable measurement period is 0% or negative, irrespective of the degree to which we may outperform the Index. Dividends on awards issued accrue during the performance period. If the designated performance objectives are achieved, OPP u nits are subject to time-based vesting requirements. Awards earned under the OPPs vest 33% in year three, 33% in year four and 34% in year five. Our executive officers (for the purposes of Section 16 of the Exchange Act) are required t o hold earned 2013 , 2014 and 2015 OPP awards for one year following vesting. Below is th e summary of the OPP units earned through December 31, 2015 and the aggregate grant date notional and fair values. Plan Year Notional Amount Grant-Date Fair Value (1) OPP Units Earned 2015 $ 40,000,000 $ 9,120,000 To be determined in 2017 2014 50,000,000 8,202,000 To be determined in 2016 2013 40,000,000 6,814,000 85,420 2012 40,000,000 12,250,000 303,202 (1) Such amounts are being amortized into expense over a five-year period from the date of grant, using a graded vesting attribution model. In the years ended December 31, 2015, 2014 and 2013, we recognized $15,531,000, $6,185,000 and $3,226,000, respectively, of compensation expense related to OPPs. As of December 31, 2015, there was $5,087,000 of total unrecognized compensation cost related to the OPPs, which will be recognized over a weighted-average period of 1.7 years. Stock Options Stock options are granted at an exercise price equal to the average of the high and low market price of our common shares on the NYSE on the date of grant, generally vest over four years and expire 10 years from the date of grant . Compensation expense related to stock option awards is recognized on a straight-line basis over the vesting period . In the years ended December 31, 2015, 2014 and 2013, we recognized $ 1 , 298 ,000 , $ 4 , 550 ,000 and $ 8 , 2 3 4 ,000 , respectively, of compensation expense related to stock options that vested during each year. As of December 31, 2015 , there was $ 1 , 325 ,000 of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period o f 1 . 7 years. Below is a summary of our stock option activity for the year ended December 31, 2015. Weighted- Weighted- Average Average Remaining Aggregate Exercise Contractual Intrinsic Shares Price Term Value Outstanding at January 1, 2015 (1) 2,965,968 $ 60.82 Granted 35,208 112.10 Exercised (160,266) 82.21 Cancelled or expired (13,340) 100.21 Outstanding at December 31, 2015 2,827,570 $ 60.06 4.0 $ 115,796,000 Options vested and expected to vest at December 31, 2015 2,826,685 $ 60.06 4.0 $ 115,788,000 Options exercisable at December 31, 2015 2,741,863 $ 59.08 3.8 $ 114,653,000 (1) Adjusted for the effect of the UE spin-off. The fair value of each option grant is estimated on the date of grant using an option-pricing model with the following weighted-average assumptions for grants in the years ended December 31, 2015, 2014 and 2013 . December 31, 2015 2014 2013 Expected volatility 35.00 % 36.00 % 36.00 % Expected life 5.0 years 5.0 years 5.0 years Risk free interest rate 1.56 % 1.81 % 0.91 % Expected dividend yield 3.30 % 4.10 % 4.30 % The weighted average grant d ate fair value of options granted during the years ended December 31, 2015, 2014 and 2013 was $ 28 . 85 , $ 20 . 31 and $ 17 . 18 , respectively. Cash received from option exercises for the years ended December 31, 2015, 2014 and 2013 was $ 15,343 ,000 , $ 17 , 441 ,000 and $ 5 , 915 ,000, respectively. The total intrinsic value of options exercised during the years ended December 31, 2015, 2014 and 2013 was $ 3 , 873 , 000, $ 18 , 223 ,000 and $ 3 , 386 ,000, respectively. Restricted Stock Restricted stock awards are granted at the average of the high and low market price of our common shares on the NYSE on the date of grant and generally vest over four years . Compensation expense related to restricted stock awards is recognized on a straight-line basis over the vesting period. In the years ended December 31, 2015, 2014 and 2013 , we recognized $ 8 3 7 ,000 , $ 1 , 3 03 ,000 and $ 1 , 34 4 ,000 , respectively , of compensation expense related to restricted stock award s that vested during each year. As of December 31, 2015 , there was $ 1 , 315 ,000 of total unrecognized compensation cost related to unvested restricted stock, which is expected to be recognized over a weighted-average period of 1 . 7 years . Dividends paid on unvested restricted stock are charged directly to retained earnings and amounted to $ 5 8 ,000 , $ 88 ,000 and $ 110 ,000 for the years ended December 31, 2015, 2014 and 2013 , respectively. Below is a summary of our restricted stock activity under the Plan for the year ended December 31, 2015. Weighted-Average Grant-Date Unvested Shares Shares Fair Value Unvested at January 1, 2015 (1) 24,478 $ 78.32 Granted 8,177 110.84 Vested (11,298) 78.08 Cancelled or expired (1,765) 88.69 Unvested at December 31, 2015 19,592 91.09 (1) Adjusted for the effect of the UE spin-off. Restricted stock awards granted in 2015, 2014 and 2013 had a fair value of $ 906 ,000, $ 1,048 , 000 and $ 857 ,000, respectively. The fair value of restricted stock that vested during the years ended December 31, 2015, 2014 and 2013 was $ 88 2 ,000 , $ 1 , 17 4 ,000 and $ 1 , 194 ,000, respectively. Restricted Operating Partnership Units (“OP Units”) OP Units are granted at the average of the high and low market price of our common shares on the NYSE on the date of grant, vest ratably over four years and are subject to a taxable book-up event, as def ined. Compensation expense related to OP Units is recognized ratably over the vesting period using a graded vesting attribution model. In the years ended December 31, 2015, 2014 and 2013 , we recognized $ 2 2 , 180 ,000, $ 2 4 , 603 ,000 and $ 22 , 110 ,000 , respectively, of compensation expense related to OP Units that vested during each year. As of December 31, 2015 , there was $ 18 , 625 ,000 of total unrecognized compensation cost related to unvested OP U nits, which is expected to be recognized over a weighted-average period of 1 . 6 years . Distributions paid on unvested OP Units are charged to “net income attributable to noncontrolling interests in the Operating Partnership ” on our consolidated statements of income and amounted to $ 2 , 414 ,000, $ 2 , 866 ,000 and $ 2 , 598 ,000 in the years ended December 31, 2015, 2014 and 2013 , respectively. Below is a summary of restricted OP unit activity under the Plan for the year ended December 31, 2015 . Weighted-Average Grant-Date Unvested Units Units Fair Value Unvested at January 1, 2015 (1) 721,662 $ 74.38 Granted 197,497 102.75 Vested (270,443) 74.22 Cancelled or expired (9,699) 83.89 Unvested at December 31, 2015 639,017 83.07 (1) Adjusted for the effect of the UE spin-off. OP Units granted in 2015, 2014 and 2013 had a fair value of $ 20 , 293 ,000, $ 1 9 , 669 ,000 and $ 31,9 4 7 ,000 , respectively. The fair value of OP Units that vested during the years ended December 31, 2015 , 2014 and 2013 was $ 20 , 072 ,000, $ 22 , 758 ,000 and $ 1 6 , 404 ,000, respectively .

Fee and Other Income

Fee and Other Income	12 Months Ended
	Dec. 31, 2015
Fee and Other Income [Abstract]
Fee and Other Income	15 . Fee and Other Income The following table sets forth the details of our fee and other income: (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 BMS cleaning fees $ 82,113 $ 85,658 $ 66,505 Lease termination fees (1) 27,233 16,362 32,630 Management and leasing fees 16,831 19,905 23,073 Other income 38,528 33,281 33,363 $ 164,705 $ 155,206 $ 155,571 (1) The year ended December 31, 2015 includes $15,000 related to the New York Stock Exchange lease termination at 20 Broad Street. The year ended December 31, 2013 includes $19,500 from a tenant at 1290 Avenue of the Americas, of which our 70% share, net of a $1,529 write-off of the straight lining of rents, was $12,121; and $3,000 from the termination of our subsidiaries' agreements with Cuyahoga County to operate the Cleveland Medical Mart Convention Center. The above table excludes fee income from partially owned ent ities, which is included in “loss from partially owned entities ” (see N ote 6 – Investments in Partially Owned Entities ).

Interest and Other Investment I

Interest and Other Investment Income (Loss), Net	12 Months Ended
	Dec. 31, 2015
Interest and Other Investment Income (Loss), Net [Abstract]
Interest and Other Investment Income (Loss), Net	16 . Interest and Other Investment Income (L oss) , N et The following table sets forth the details of our interest and other investment income (loss) , net : (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Dividends on marketable securities $ 12,836 $ 12,707 $ 11,446 Interest on loans receivable 6,371 6,107 20,683 Mark-to-market of investments in our deferred compensation plan (1) 111 11,557 10,636 Losses from the disposition of investment in J.C. Penney - - (72,974) Other, net 7,660 8,381 5,322 $ 26,978 $ 38,752 $ (24,887) (1) This income is entirely offset by the 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

Interest and Debt Expense	12 Months Ended
	Dec. 31, 2015
Interest and Debt Expense [Abstract]
Interest And Debt Expenss	17 . Interest and Debt Expense Th e following table sets forth the details of our interest and debt expense. (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Interest expense $ 405,169 $ 430,278 $ 444,412 Amortization of deferred financing costs 32,161 45,263 23,673 Capitalized interest and debt expense (59,305) (62,786) (42,303) $ 378,025 $ 412,755 $ 425,782

Income Per Share

Income Per Share	12 Months Ended
	Dec. 31, 2015
Income Per Share [Abstract]
Income Per Share	18 . 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. D ilutive share equivalents may include our Series A convertible preferred shares, employee stock options and restricted stock awards . (Amounts in thousands, except per share amounts) Year Ended December 31, 2015 2014 2013 Numerator: Income (loss) from continuing operations, net of income attributable to noncontrolling interests $ 711,240 $ 312,700 $ (56,727) Income from discontinued operations, net of income attributable to noncontrolling interests 49,194 552,152 532,698 Net income attributable to Vornado 760,434 864,852 475,971 Preferred share dividends (80,578) (81,464) (82,807) Preferred unit and share redemptions - - (1,130) Net income attributable to common shareholders 679,856 783,388 392,034 Earnings allocated to unvested participating securities (81) (125) (110) Numerator for basic income per share 679,775 783,263 391,924 Impact of assumed conversions: Convertible preferred share dividends 91 97 - Numerator for diluted income per share $ 679,866 $ 783,360 $ 391,924 Denominator: Denominator for basic income per share – weighted average shares 188,353 187,572 186,941 Effect of dilutive securities (1) : Employee stock options and restricted share awards 1,166 1,075 768 Convertible preferred shares 45 43 - Denominator for diluted income per share – weighted average shares and assumed conversions 189,564 188,690 187,709 INCOME (LOSS) PER COMMON SHARE – BASIC: Income (loss) from continuing operations, net $ 3.35 $ 1.23 $ (0.75) Income from discontinued operations, net 0.26 2.95 2.85 Net income per common share $ 3.61 $ 4.18 $ 2.10 INCOME (LOSS) PER COMMON SHARE – DILUTED: Income (loss) from continuing operations, net $ 3.33 $ 1.22 $ (0.75) Income from discontinued operations, net 0.26 2.93 2.84 Net income per common share $ 3.59 $ 4.15 $ 2.09 (1) The effect of dilutive securities in the years ended December 31, 2015, 2014 and 2013 excludes an aggregate of 11,744, 11,238 and 11,752 weighted average common share equivalents, respectively, as their effect was anti-dilutive.

Leases

Leases	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Leases	19 . Leases As lessor: We lease space to tenants under operating leases. Most of the leases provide for the payment of fixed base rentals payable monthly in advance. Office building leases generally require the tenants to reimburse us for operating costs and real estate taxes above their base year costs. Shopping center leases provide for pass-through to tenants the tenant's share of real estate taxes, insurance and maintenance. Shopping center leases also provide for the payment by the lessee of additional rent based on a percentage of the tenants' sales. As of December 31, 2015 , future base rental revenue under non-cancelable operating leases, excluding rents for leases with an original term of less than one year and rents resulting from th e exercise of renewal options, are as follows: (Amounts in thousands) Year Ending December 31: 2016 $ 1,633,615 2017 1,686,056 2018 1,644,440 2019 1,496,805 2020 1,349,724 Thereafter 8,103,382 These amounts do not inclu de percentage rentals based on tenants' sales. These percentage rents approximated $ 5,760 ,000 , $ 6,343 ,000 and $ 7,344 ,000 , for the years ended Dece mber 31, 2015 , 2014 and 2013 , respectively. N one of our tenants accounted for more than 10 % of total revenues in any of the years ended December 31, 2015 , 2014 and 2013 . As lessee: We are a tenant under operating leases for certain properties. These leases have terms that expire during the next thirty years. Future minimum lease payments under operating leases at December 31, 2015 are as follows : (Amounts in thousands) Year Ending December 31: 2016 $ 33,265 2017 34,831 2018 35,317 2019 35,826 2020 36,353 Thereafter 1,557,541 Rent expense w as $ 3 8,887 ,000 , $ 36,315 ,000 and $ 35 , 913 ,000 for the years ended December 31, 2015 , 2014 and 2013 , respectively. We are also a lessee under a capital lease under which we will redevelop the retail and signage components of the Marrio t t Marquis Times Square Hotel . The lease has put/call options, which if exercised would lead to our ownership. Capitalized leases are recorded at the present value of future minimum lease payments or the fair market value of the property. Capitalized leases are depreciated on a straight-line basis over the estimated life of the asset or life of the related lease. Depreciation expense on capital leases is included in “depreciation and amortization” on our consolidated statements of income. As of December 31, 2015 , future minimum lease payments under this capital lease are as follows: (Amounts in thousands) Year Ending December 31: 2016 $ 12,500 2017 12,500 2018 12,500 2019 12,500 2020 12,500 Thereafter 322,292 Total minimum obligations 384,792 Interest portion (144,792) Present value of net minimum payments $ 240,000 At Decem ber 31, 2015 , the gross carrying amount of the property leased under the capital lease was $ 424 ,3 69 ,000 , which is a component of “ buildings and improvements” on our consolidated balance sheet .

Multiemployer Benefit Plans

Multiemployer Benefit Plans	12 Months Ended
	Dec. 31, 2015
Multiemployer Benefit Plans [Abstract]
Multiemployer Benefit Plans	20 . M ultiemployer Benefit Plans Our subsidiaries make contributions to certain multiemployer defined benefit plans (“Multiemployer Pension Plans”) and health plans (“Multiemployer Health Plans”) for our union represented employees, pursuant to the respective collective bargaining agreements. Multiemployer Pension Plans Multiemployer Pension Plans differ from single-employer pension plans in that ( i ) contributions to multiemployer plans may be used to provide benefits to employees of other participating employers and (ii) if other participating employers fail to make their contributions , each of our participating subsidiaries may be required to bear its then pro rata share of unfunded obligations . If a participating subsidiar y withdraw s from a plan in which it participates, it may be subject to a withdrawal liability. As of December 31, 2015 , our subsidiaries' participation in these plans was not significant to our consolidated financial statements . In the years ended December 31, 2015 , 2014 and 2013 , our subsidiaries contributed $ 1 0 , 878 ,000 , $ 11 ,431 ,000 and $ 10 , 223 ,000 , respectively, towards Multiemployer Pension Plans, which is included as a component of “operating” expenses on our consolidated statements of income. Our subsidiaries' contributions did not represent more than 5 % of total employer contributions in any of these plan s for the years ended December 31, 2015 , 2014 and 2013 . Multiemployer Health Plans Multiemployer Health Plans in which our subsidiaries participate provide health benefits to eligible active and retired employees. In the years ended December 31, 2015 , 2014 and 2013 , our subsidiaries contributed $ 2 9 , 269 ,000 , $ 29,073 ,000 and $ 2 6 , 262 ,000 , respectively , towards the se plans, which is included as a component of “operating” expenses on our consolidated statements of income.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	21. Commitmen ts 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 $3,200,00 0 ($2,400,000 effective January 1 , 2016) per occurrence and 15% of the balance of a covered loss (16% effective January 1, 2016) and the Federal government is responsible for the remaining 85% of a covered loss (84% effective January 1, 2016). 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 adversel y 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. 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 December 31, 2015, the aggregate dollar amount of these guarantees and master leases is approximately $ 427,000 ,000 . At December 31, 2015 , $ 38,096 ,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 December 31, 2015, w e expect to fund additional capital to certain of our partially owned enti ties aggregating approximately $ 70,000 ,000 . As of December 31, 2015 , we have construction commitments aggregating $873,800,000 .

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions Disclosure	22 . Related Party Transactions Alexander's We own 32.4% of Alexander's. Steven Roth, the Chairman of our Board and Chief Executive Officer is also the Chairman of the Board and Chief Executive Officer of Alexander's. We provide various services to Alexander's in accordance with management, development and leasing agreements. These agreements are described in Note 6 - Investments in Partially Owned Entities . On January 15, 2015, we completed the spin-off of 79 strip shopping centers, three malls, a warehouse park and $225,000,000 of cash to UE and the transfer of all of the employees responsible for the management and leasing of those assets. In addition, we entered into agreements with UE to provide management and leasing services, on our behalf, for Alexander's Rego Park retail assets. Fees for these services are similar to the fees we are receiving from Alexander's as described in Note 6 - Investments in Partially Owned Entities . Interstate Properties (“Interstate”) Interstate is a general partnership in which Mr. Roth is the managing general partner. David Mandelbaum and Russell B. Wight, Jr., Trustees of Vornado and Directors of Alexander's, are Interstate's two other general partners. As of December 31, 2015, Interstate and its partners be neficially owned an aggregate of approximately 7.1 % of the common shares of beneficial interest of Vornado and 2 6.3 % of Alexander's common stock. We manage and lease the real estate assets of Interstate pursuant to a management agreement for which we receive an annual fee equal to 4% of annual base rent and percentage rent. The management agreement has a term of one year and is automatically renewable unless terminated by either of the parties on 60 days' notice at the end of the term. We believe, based upon comparable fees charged by other real estate companies, that the management agreement terms are fair to us. We earned $ 541 , 000, $ 535 ,000, and $ 606 ,000 of management fees under the agreement for the years ended December 31, 2015, 2014 and 2013 .

Summary of Quarterly Results (U

Summary of Quarterly Results (Unaudited)	12 Months Ended
	Dec. 31, 2015
Summary of Quarterly Results (Unaudited) [Abstract]
Summary of Quarterly Results (Unaudited)	23. Summary of Quarterly Results (Unaudited) The following summary represents the results of operations for each quarter in 2015 and 2014 : (Amounts in thousands, except per share amounts) Net Income Attributable Net Income Per to Common Common Share (2) Revenues Shareholders (1) Basic Diluted 2015 December 31 $ 651,581 $ 230,742 $ 1.22 $ 1.22 September 30 627,596 198,870 1.05 1.05 June 30 616,288 165,651 0.88 0.87 March 31 606,802 84,593 0.45 0.45 2014 December 31 $ 597,010 $ 513,238 $ 2.73 $ 2.72 September 30 578,710 131,159 0.70 0.69 June 30 574,411 76,642 0.41 0.41 March 31 562,381 62,349 0.33 0.33 (1) Fluctuations among quarters resulted primarily from non-cash impairment losses, mark-to-market of derivative instruments, net gains on sale of real estate and from seasonality of business operations. (2) The total for the year may differ from the sum of the quarters as a result of weighting.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2015
Segment Information [Abstract]
Segment Information	24 . Segment Information As a result of the spin-off of substantially all of our Retail Properties segment (see Note 7 – Disposition s ), the remaining retail properties no longer meet the criteria to be a separate reportable segment. In addition, as a result of our investment in Toys being reduced to zero, we suspended equity method accounting for our investment in Toys (see Note 6 – Investments in Partially Owned Entities ) and the Toys segment no longer meets the criteria to be a separate reportab le segment. Accordingly, effective January 1, 2015, the Retail Properties segment and Toys have been reclassified to the Other segment. Below is a summary of net income and a reconciliation of net income to EBITDA ( 1) by segment for the years ended December 31, 2015 , 2014 and 2013 . (Amounts in thousands) For the Year Ended December 31, 2015 Total New York Washington, DC Other Total revenues $ 2,502,267 $ 1,695,925 $ 532,812 $ 273,530 Total expenses 1,742,019 1,032,015 390,921 319,083 Operating income (loss) 760,248 663,910 141,891 (45,553) (Loss) income from partially owned entities (12,630) 655 (5,083) (8,202) Income from real estate fund investments 74,081 - - 74,081 Interest and other investment income (loss), net 26,978 7,722 (262) 19,518 Interest and debt expense (378,025) (194,278) (68,727) (115,020) Net gain on disposition of wholly owned and partially owned assets 251,821 142,693 102,404 6,724 Income (loss) before income taxes 722,473 620,702 170,223 (68,452) Income tax benefit (expense) 84,695 (4,379) (317) 89,391 Income from continuing operations 807,168 616,323 169,906 20,939 Income from discontinued operations 52,262 - - 52,262 Net income 859,430 616,323 169,906 73,201 Less net income attributable to noncontrolling interests (98,996) (13,022) - (85,974) Net income (loss) attributable to Vornado 760,434 603,301 169,906 (12,773) Interest and debt expense (2) 469,843 248,724 82,386 138,733 Depreciation and amortization (2) 664,637 394,028 179,788 90,821 Income tax (benefit) expense (2) (85,379) 4,766 (1,610) (88,535) EBITDA (1) $ 1,809,535 $ 1,250,819 (3) $ 430,470 (4) $ 128,246 (5) Balance Sheet Data: Real estate, at cost $ 18,090,137 $ 10,577,078 $ 4,544,842 $ 2,968,217 Investments in partially owned entities 1,550,422 1,195,122 100,511 254,789 Total assets 21,143,293 12,257,774 4,536,895 4,348,624 See notes on pages 136 and 137. (Amounts in thousands) For the Year Ended December 31, 2014 Total New York Washington, DC Other Total revenues $ 2,312,512 $ 1,520,845 $ 537,151 $ 254,516 Total expenses 1,622,619 946,466 358,019 318,134 Operating income (loss) 689,893 574,379 179,132 (63,618) (Loss) income from partially owned entities (59,861) 20,701 (3,677) (76,885) Income from real estate fund investments 163,034 - - 163,034 Interest and other investment income, net 38,752 6,711 183 31,858 Interest and debt expense (412,755) (183,427) (75,395) (153,933) Net gain on disposition of wholly owned and partially owned assets 13,568 - - 13,568 Income (loss) before income taxes 432,631 418,364 100,243 (85,976) Income tax expense (9,281) (4,305) (242) (4,734) Income (loss) from continuing operations 423,350 414,059 100,001 (90,710) Income from discontinued operations 585,676 463,163 - 122,513 Net income 1,009,026 877,222 100,001 31,803 Less net income attributable to noncontrolling interests (144,174) (8,626) - (135,548) Net income (loss) attributable to Vornado 864,852 868,596 100,001 (103,745) Interest and debt expense (2) 654,398 241,959 89,448 322,991 Depreciation and amortization (2) 685,973 324,239 145,853 215,881 Income tax expense (2) 24,248 4,395 288 19,565 EBITDA (1) $ 2,229,471 $ 1,439,189 (3) $ 335,590 (4) $ 454,692 (5) Balance Sheet Data: Real estate, at cost $ 16,822,358 $ 9,732,818 $ 4,383,418 $ 2,706,122 Investments in partially owned entities 1,240,489 1,036,130 102,635 101,724 Total assets 21,157,980 10,706,476 4,300,628 6,150,876 (Amounts in thousands) For the Year Ended December 31, 2013 Total New York Washington, DC Other Total revenues $ 2,299,176 $ 1,470,907 $ 541,161 $ 287,108 Total expenses 1,624,625 910,498 347,686 366,441 Operating income (loss) 674,551 560,409 193,475 (79,333) (Loss) income from partially owned entities (340,882) 15,527 (6,968) (349,441) Income from real estate fund investments 102,898 - - 102,898 Interest and other investment (loss) income, net (24,887) 5,357 129 (30,373) Interest and debt expense (425,782) (181,966) (102,277) (141,539) Net gain on disposition of wholly owned and partially owned assets 2,030 - - 2,030 (Loss) income before income taxes (12,072) 399,327 84,359 (495,758) Income tax benefit (expense) 8,717 (2,794) 14,031 (2,520) (Loss) income from continuing operations (3,355) 396,533 98,390 (498,278) Income from discontinued operations 568,095 160,314 - 407,781 Net income (loss) 564,740 556,847 98,390 (90,497) Less net income attributable to noncontrolling interests (88,769) (10,786) - (77,983) Net income (loss) attributable to Vornado 475,971 546,061 98,390 (168,480) Interest and debt expense (2) 758,781 236,645 116,131 406,005 Depreciation and amortization (2) 732,757 293,974 142,409 296,374 Income tax expense (benefit) (2) 26,371 3,002 (15,707) 39,076 EBITDA (1) $ 1,993,880 $ 1,079,682 (3) $ 341,223 (4) $ 572,975 (5) Balance Sheet Data: Real estate, at cost $ 15,392,968 $ 8,422,297 $ 4,243,048 $ 2,727,623 Investments in partially owned entities 1,159,803 904,278 100,543 154,982 Total assets 20,018,210 9,214,055 4,098,338 6,705,817 See notes on page 136 and 137. Notes to preceding tabular information: (1) EBITDA represents "Earnings Before Interest, Taxes, Depreciation and Amortization." 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 in the reconciliation of net income 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 Year Ended December 31, 2015 2014 2013 Office $ 661,579 $ 622,818 $ 612,009 Retail 358,379 281,428 246,808 Residential 22,266 21,907 20,420 Alexander's 42,858 41,746 42,210 Hotel Pennsylvania 23,044 30,753 30,723 Net gains on sale of real estate (a) 142,693 440,537 127,512 Total New York $ 1,250,819 $ 1,439,189 $ 1,079,682 (a) Net gains on sale of real estate are related to 20 Broad Street in 2015, 1740 Broadway in 2014, and 866 UN Plaza in 2013. (4) The elements of "Washington, DC" EBITDA are summarized below. (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Office, excluding the Skyline properties $ 264,864 $ 266,859 $ 268,373 Skyline properties 24,224 27,150 29,499 Net gain on sale of 1750 Pennsylvania Avenue 102,404 - - Total Office 391,492 294,009 297,872 Residential 38,978 41,581 43,351 Total Washington, DC $ 430,470 $ 335,590 $ 341,223 Notes to preceding tabular information: (5) The elements of "Other" EBITDA are summarized below. (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Our share of real estate fund investments: Income before net realized/unrealized gains $ 8,611 $ 8,056 $ 7,752 Net realized/unrealized gains on investments 14,657 37,535 23,489 Carried interest 10,696 24,715 18,230 Total 33,964 70,306 49,471 theMart and trade shows 79,159 79,636 74,270 555 California Street 49,975 48,844 42,667 India real estate ventures 3,933 6,434 5,841 Our share of Toys (a) 2,500 103,632 (12,081) Other investments 38,141 16,896 45,856 207,672 325,748 206,024 Corporate general and administrative expenses (b)(c) (106,416) (94,929) (94,904) Investment income and other, net (b) 26,385 31,665 46,525 Gains on sale of partially owned entities and other 37,666 13,000 - UE and residual retail properties discontinued operations 28,314 245,679 541,516 Our share of impairment loss on India real estate ventures (14,806) (5,771) - Acquisition and transaction related costs (12,511) (16,392) (24,857) Net gain on sale of marketable securities, land parcels and residential condominiums 6,724 13,568 56,868 Impairment loss and loan loss reserve on investment in Suffolk Downs (1,551) (10,263) - Losses from the disposition of investment in J.C. Penney - - (127,888) Severance costs (primarily reduction in force at theMart) - - (5,492) Net income attributable to noncontrolling interests in the Operating Partnership (43,231) (47,613) (24,817) $ 128,246 $ 454,692 $ 572,975 (a) As a result of our investment being reduced to zero, we suspended equity method accounting in the third quarter of 2014 (see Note 6 - Investments in Partially Owned Entities ). The years ended December 31, 2014 and 2013 include an impairment loss of $75,196 and $240,757, respectively. (b) The amounts in these captions (for this table only) exclude income/expense from the mark-to-market of our deferred compensation plan of $111, $11,557 and $10,636 for the years ended December 31, 2015, 2014 and 2013, respectively. (c) The year ended December 31, 2015 includes $6,217 from the acceleration of the recognition of compensation expense related to 2013-2015 Out-Performance Plans due to the modification of the vesting criteria of awards such that they will fully vest at age 65. The accelerated expense will result in lower general and administrative expense for 2016 of $2,940 and $3,277 thereafter.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	25 . S ubsequent Events 2016 Out-Performance Plan On January 14, 2016, the Compensation Committee approved the 2016 Outperformance Plan, a multi-year, performance-based equity compensation plan and related form of award agreement (the “2016 OPP”). Awards under the 2016 OPP constitute awards under Vornado's shareholder approved 2010 Omnibus Share Plan. Under the 2016 OPP, participants, including our Chairman and Chief Executive Officer, have the opportunity to earn compensation payable in the form of operating partnership units if, and only if, we outperform a predetermined total shareholder return (“TSR”) and/or outperform the market with respect to relative total TSR during a three-year performance period. Specifically, awards under our 2016 OPP may potentially be earned if we (i) achieve a TSR above that of the SNL US REIT Index (the “Index”) over a three-year performance period (the “Relative Component”) and/or (ii) achieve a TSR level greater than 7% per annum, or 21% over the three-year performance period (the “Absolute Component”). To the extent awards would be earned under the Absolute Component but we underperform the Index, such awards earned under the Absolute Component would be reduced (and potentially fully negated) based on the degree to which we underperform the Index. In certain circumstances, in the event we outperform the Index but awards would not otherwise be earned under the Absolute Component, awards may still be earned under the Relative Component. Moreover, to the extent awards would otherwise be earned under the Relative Component but we fail to achieve at least a 3% per annum absolute TSR, such awards earned under the Relative Component would be reduced based on our absolute TSR performance, with no awards being earned in the event our TSR during the applicable measurement period is 0% or negative, irrespective of the degree to which it may outperform the Index. If the designated performance objectives are achieved, OPP Units are also subject to time-based vesting requirements. Dividend payments on awards issued accrue during the performance period and are paid to participants if, and only if, awards are ultimately earned based on the achievement of the designated performance objectives. In addition, all of our executive officers (for the purposes of Section 16 of the Exchange Act) are required to hold any earned OPP Units for one year following vesting. 770 Broadway Refinancing 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% ( 2.18 % at February 11, 2016) which was swapped for four and a half years to a fixed rate of 2. 56 % . We realized net proceeds of approximately $330 ,000,000. The property was previously encumbered by a 5.65%, $353,000,000 mortgage maturing in March 2016.

SEC Schedule II Valuation and Q

SEC Schedule II Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2015
Valuation And Qualifying Accounts [Abstract]
Schedule II Valuation and Qualifying Accounts	VORNADO REALTY TRUST SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS December 31, 2015 (Amounts in Thousands) Column A Column B Column C Column D Column E Additions Balance at Charged Uncollectible Balance Beginning Against Accounts at End Description of Year Operations Written-off of Year Year Ended December 31, 2015: Allowance for doubtful accounts $ 21,209 $ (99) $ (6,451) $ 14,659 Year Ended December 31, 2014: Allowance for doubtful accounts $ 24,719 $ 3,076 $ (6,586) $ 21,209 Year Ended December 31, 2013: Allowance for doubtful accounts $ 28,675 $ 9,326 $ (13,282) $ 24,719

SEC Schedule III Real Estate an

SEC Schedule III Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2015
Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III Real Estate and Accumulated Depreciation	VORNADO REALTY TRUST SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (Amounts in thousands) COLUMN A COLUMN B COLUMN C COLUMN D COLUMN E COLUMN F COLUMN G COLUMN H COLUMN I Gross amount at which Life on which Initial cost to company (1) carried at close of period depreciation Costs Accumulated in latest Building capitalized Buildings depreciation income and subsequent and and Date of Date statement Encumbrances (2) Land improvements to acquisition Land improvements Total (3) amortization construction (4) acquired is computed New York New York Manhattan 1290 Avenue of the Americas $ 950,000 $ 515,539 $ 923,653 $ 156,868 $ 515,540 $ 1,080,520 $ 1,596,060 $ 233,742 1963 2007 (5) 697-703 Fifth Avenue (St. Regis - retail) 450,000 152,825 584,230 - 152,825 584,230 737,055 17,197 2014 (5) 350 Park Avenue 289,242 265,889 363,381 45,811 265,889 409,192 675,081 94,115 1960 2006 (5) 666 Fifth Avenue (Retail Condo) 390,000 189,005 471,072 - 189,005 471,072 660,077 37,030 2012 (5) One Penn Plaza - - 412,169 200,348 - 612,517 612,517 261,693 1972 1998 (5) 100 West 33rd Street 398,402 242,776 247,970 31,934 242,776 279,904 522,680 61,476 1911 2007 (5) 150 West 34th Street 205,000 119,657 268,509 1 119,658 268,509 388,167 3,916 1900 2015 (5) 1535 Broadway (Marriott Marquis) - - 249,285 137,101 - 386,386 386,386 4,796 2012 (5) 1540 Broadway - 110,000 223,122 26,714 110,001 249,835 359,836 43,592 2006 (5) 655 Fifth Avenue 140,000 102,594 231,903 - 102,594 231,903 334,497 13,149 2013 (5) Two Penn Plaza 575,000 53,615 164,903 98,098 52,689 263,927 316,616 133,450 1968 1997 (5) 90 Park Avenue - 8,000 175,890 96,269 8,000 272,159 280,159 98,331 1964 1997 (5) Manhattan Mall 181,598 88,595 113,473 71,400 88,595 184,873 273,468 48,993 2009 2007 (5) 770 Broadway 353,000 52,898 95,686 97,290 52,898 192,976 245,874 75,613 1907 1998 (5) 888 Seventh Avenue 375,000 - 117,269 115,848 - 233,117 233,117 97,680 1980 1998 (5) 909 Third Avenue 350,000 - 120,723 80,715 - 201,438 201,438 76,663 1969 1999 (5) Eleven Penn Plaza 450,000 40,333 85,259 72,995 40,333 158,254 198,587 60,765 1923 1997 (5) 7 West 34th Street - - - 182,067 34,614 147,453 182,067 62,011 1901 2000 (5) 640 Fifth Avenue - 38,224 25,992 102,472 38,224 128,464 166,688 41,282 1950 1997 (5) 150 East 58th Street - 39,303 80,216 40,870 39,303 121,086 160,389 50,879 1969 1998 (5) 595 Madison Avenue - 62,731 62,888 26,218 62,731 89,106 151,837 33,566 1968 1999 (5) 828-850 Madison Avenue 80,000 107,937 28,261 10 107,937 28,271 136,208 7,538 2005 (5) 33-00 Northern Boulevard 61,759 46,505 86,226 - 46,505 86,226 132,731 2,189 1915 2015 (5) 330 West 34th Street - - 8,599 111,810 - 120,409 120,409 6,530 1925 1998 (5) 715 Lexington Avenue - - 26,903 63,002 63,000 26,905 89,905 7,243 1923 2001 (5) 478-486 Broadway - 30,000 20,063 33,827 30,000 53,890 83,890 9,610 2009 2007 (5) 4 Union Square South 117,904 24,079 55,220 2,610 24,080 57,829 81,909 16,392 1965/2004 1993 (5) 260 Eleventh Avenue - - 80,482 10 - 80,492 80,492 943 1911 2015 (5) 510 Fifth Avenue - 34,602 18,728 19,227 34,602 37,955 72,557 5,820 2010 (5) 40 Fulton Street - 15,732 26,388 15,153 15,732 41,541 57,273 16,888 1987 1998 (5) 689 Fifth Avenue - 19,721 13,446 22,809 19,721 36,255 55,976 9,492 1925 1998 (5) 443 Broadway - 11,187 41,186 - 11,187 41,186 52,373 2,693 2013 (5) 40 East 66th Street - 13,616 34,635 142 13,616 34,777 48,393 8,739 2005 (5) 155 Spring Street - 13,700 30,544 2,582 13,700 33,126 46,826 7,527 2007 (5) VORNADO REALTY TRUST SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (Amounts in thousands) COLUMN A COLUMN B COLUMN C COLUMN D COLUMN E COLUMN F COLUMN G COLUMN H COLUMN I Gross amount at which Life on which Initial cost to company (1) carried at close of period depreciation Costs Accumulated in latest Building capitalized Buildings depreciation income and subsequent and and Date of Date statement Description Encumbrances (2) Land improvements to acquisition Land improvements Total (3) amortization construction (4) acquired is computed 435 Seventh Avenue $ 98,000 $ 19,893 $ 19,091 $ 37 $ 19,893 $ 19,128 $ 39,021 $ 6,449 2002 1997 (5) 3040 M Street - 7,830 27,490 3,256 7,830 30,746 38,576 7,960 2006 (5) 608 Fifth Avenue - - - 33,906 - 33,906 33,906 3,601 1932 2012 (5) 692 Broadway - 6,053 22,908 3,540 6,053 26,448 32,501 6,895 2005 (5) 265 West 34th Street - 28,500 - - 28,500 - 28,500 - 1920 2015 (5) 677-679 Madison Avenue - 13,070 9,640 388 13,070 10,028 23,098 2,401 2006 (5) 1131 Third Avenue - 7,844 7,844 5,198 7,844 13,042 20,886 719 1997 (5) 431 Seventh Avenue - 16,700 2,751 - 16,700 2,751 19,451 602 2007 (5) 138-142 West 32nd Street - 9,252 9,936 - 9,252 9,936 19,188 228 1920 2015 (5) 304 Canal Street - 3,511 12,905 1,109 - 17,525 17,525 - 1910 2014 (5) 334 Canal Street - 1,693 6,507 7,264 1,693 13,771 15,464 221 2011 (5) 267 West 34th Street - 5,099 10,037 - 5,099 10,037 15,136 548 2013 (5) 966 Third Avenue - 8,869 3,631 - 8,869 3,631 12,500 212 2013 (5) 148 Spring Street - 3,200 8,112 406 3,200 8,518 11,718 1,621 2008 (5) 150 Spring Street - 3,200 5,822 258 3,200 6,080 9,280 1,175 2008 (5) 137 West 33rd Street - 6,398 1,550 - 6,398 1,550 7,948 29 1932 2015 (5) 488 Eighth Avenue - 10,650 1,767 (4,674) 6,859 884 7,743 178 2007 (5) 484 Eighth Avenue - 3,856 762 399 3,856 1,161 5,017 365 1997 (5) 825 Seventh Avenue - 1,483 697 33 1,483 730 2,213 341 1997 (5) Other (Including signage) - 70,683 20,378 98,431 70,683 118,809 189,492 21,395 Total New York 5,464,905 2,626,847 5,660,102 2,003,752 2,716,237 7,574,464 10,290,701 1,706,483 New Jersey Paramus - - - 25,339 1,033 24,306 25,339 12,194 1967 1987 (5) Other Properties Hotel Pennsylvania - 29,903 121,712 86,609 29,903 208,321 238,224 95,882 1919 1997 (5) Total New York 5,464,905 2,656,750 5,781,814 2,115,700 2,747,173 7,807,091 10,554,264 1,814,559 VORNADO REALTY TRUST SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (Amounts in thousands) COLUMN A COLUMN B COLUMN C COLUMN D COLUMN E COLUMN F COLUMN G COLUMN H COLUMN I Gross amount at which Life on which Initial cost to company (1) carried at close of period depreciation Costs Accumulated in latest Building capitalized Buildings depreciation income and subsequent and and Date of Date statement Description Encumbrances (2) Land improvements to acquisition Land improvements Total (3) amortization construction (4) acquired is computed Washington, DC Washington, DC 2011-2451 Crystal Drive - 5 buildings $ 220,248 $ 100,935 $ 409,920 $ 149,218 $ 100,228 $ 559,845 $ 660,073 $ 213,614 1984-1989 2002 (5) Skyline Properties - 8 buildings 696,319 64,544 355,563 88,132 64,355 443,884 508,239 152,263 1973-2001 2002 (5) 2001 Jefferson Davis Highway, 69,869 57,213 131,206 404,016 57,070 346,946 404,016 81,180 1964-1969 2002 (5) 2100/2200 Crystal Drive, 223 23rd Street, 2221 South Clark Street, Crystal City Shops at 2100, 220 20th Street S. Clark Street/12th Street - 5 buildings 55,722 63,420 231,267 78,426 63,291 309,822 373,113 101,024 1981, 1983-1987 2002 (5) 1550-1750 Crystal Drive/ 38,707 64,817 218,330 79,201 64,652 297,696 362,348 101,272 1974-1980 2002 (5) 241-251 18th Street - 4 buildings RiverHouse Apartments 307,710 118,421 125,078 73,611 138,854 178,256 317,110 40,965 2007 (5) Met Park / Warehouses - 106,946 1,326 186,466 124,585 170,153 294,738 67 2007 (5) 1825 - 1875 Connecticut Ave NW - 185,000 69,393 143,320 116,996 68,612 156,656 225,268 38,670 1956, 1963 2007 (Universal Buildings) - 2 buildings (5) West End 25 101,671 67,049 5,039 106,814 68,198 110,704 178,902 17,389 2007 (5) 2101 L Street, NW 146,222 32,815 51,642 84,372 39,768 129,061 168,829 35,595 1975 2003 (5) 2200 / 2300 Clarendon Blvd 23,250 - 105,475 49,165 - 154,640 154,640 56,063 1988-1989 2002 (5) (Courthouse Plaza) - 2 buildings 1800, 1851 and 1901 South Bell Street - 37,551 118,806 (4,269) 37,551 114,537 152,088 35,454 1968 2002 (5) - 3 buildings 875 15th Street, NW (Bowen Building) 115,022 30,077 98,962 2,835 30,176 101,698 131,874 26,980 2004 2005 (5) 1399 New York Avenue, NW - 33,481 67,363 7,047 34,178 73,713 107,891 10,138 2011 (5) Commerce Executive - 3 buildings - 13,401 58,705 25,080 13,140 84,046 97,186 29,088 1985-1989 2002 (5) H Street - North 10-1D Land Parcel - 104,473 55 (33,069) 61,970 9,489 71,459 - 2007 (5) Crystal City Hotel - 8,000 47,191 10,888 8,000 58,079 66,079 16,263 1968 2004 (5) 1150 17th Street, NW 28,728 23,359 24,876 14,388 24,723 37,900 62,623 31,700 1970 2002 (5) Democracy Plaza One - - 33,628 6,103 - 39,731 39,731 18,189 1987 2002 (5) 1730 M Street, NW 14,853 10,095 17,541 11,863 10,687 28,812 39,499 11,086 1963 2002 (5) 1726 M Street, NW - 9,450 22,062 3,433 9,455 25,490 34,945 21,502 1964 2006 (5) Crystal Drive Retail - - 20,465 7,294 - 27,759 27,759 11,493 2004 2004 (5) 1109 South Capitol Street - 11,541 178 (253) 11,597 (131) 11,466 - 2007 (5) South Capitol - 4,009 6,273 (1,920) - 8,362 8,362 - 2005 (5) Other - 1,763 52,408 (27,100) 1,763 25,308 27,071 705 Total Washington, DC 2,003,321 1,032,753 2,346,679 1,438,737 1,032,853 3,492,456 4,525,309 1,050,700 VORNADO REALTY TRUST SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (Amounts in thousands) COLUMN A COLUMN B COLUMN C COLUMN D COLUMN E COLUMN F COLUMN G COLUMN H COLUMN I Gross amount at which Life on which Initial cost to company (1) carried at close of period depreciation Costs Accumulated in latest Building capitalized Buildings depreciation income and subsequent and and Date of Date statement Description Encumbrances (2) Land improvements to acquisition Land improvements Total (3) amortization construction (4) acquired is computed Other theMart Illinois theMart, Chicago $ 550,000 $ 64,528 $ 319,146 $ 307,313 $ 64,535 $ 626,452 $ 690,987 $ 232,480 1930 1998 (5) 527 West Kinzie, Chicago - 5,166 - 25 5,166 25 5,191 - Total Illinois 550,000 69,694 319,146 307,338 69,701 626,477 696,178 232,480 New York MMPI Piers - - - 13,840 - 13,840 13,840 1,426 2008 (5) Total theMart 550,000 69,694 319,146 321,178 69,701 640,317 710,018 233,906 555 California Street 589,063 221,903 893,324 91,882 221,903 985,206 1,207,109 217,490 1922/1969/1970 2007 (5) 220 Central Park South 950,000 115,720 16,420 654,912 - 787,052 787,052 - 2005 (5) Borgata Land, Atlantic City, NJ 57,549 83,089 - - 83,089 - 83,089 - 2010 (5) Wayne Towne Center - - 26,137 42,628 - 68,765 68,765 8,254 2010 (5) 40 East 66th Residential - 29,199 85,798 (93,222) 8,454 13,321 21,775 3,142 2005 (5) Annapolis - - 9,652 - - 9,652 9,652 3,207 2005 (5) 677-679 Madison - 1,462 1,058 284 1,626 1,178 2,804 361 2006 (5) Other - - - 4,270 - 4,270 4,270 785 2005 (5) Total Other 2,146,612 521,067 1,351,535 1,021,932 384,773 2,509,761 2,894,534 467,145 Leasehold Improvements Equipment and Other - - - 116,030 - 116,030 116,030 85,863 Total December 31, 2015 $ 9,614,838 $ 4,210,570 $ 9,480,028 $ 4,692,399 $ 4,164,799 $ 13,925,338 $ 18,090,137 $ 3,418,267 (1) Initial cost is cost as of January 30, 1982 (the date on which we commenced real estate operations) unless acquired subsequent to that date see Column H. (2) Represents the contractual debt obligations. (3) The net basis of our assets and liabilities for tax reporting purposes is approximately $3.4 billion lower than the amount reported for financial statement purposes. (4) Date of original construction –– many properties have had substantial renovation or additional construction –– see Column D. (5) Depreciation of the buildings and improvements are calculated over lives ranging from the life of the lease to forty years. VORNADO REALTY TRUST SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION Notes: (1) Initial cost is cost as of January 30, 1982 (the date on which Vornado commenced real estate operations) unless acquired subsequent to that date see Column H. (2) Excludes deferred financing costs, net and other of $101,125,000. (3) The net basis of the Company’s assets and liabilities for tax reporting purposes is approximately $3.4 billion lower than the amount reported for financial statement purposes. (4) Date of original construction –– many properties have had substantial renovation or additional construction –– see Column D. (5) Depreciation of the buildings and improvements are calculated over lives ranging from the life of the lease to forty years. VORNADO REALTY TRUST SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (AMOUNTS IN THOUSANDS) The following is a reconciliation of real estate assets and accumulated depreciation: Year Ended December 31, 2015 2014 2013 Real Estate Balance at beginning of period $ 16,822,358 $ 15,392,968 $ 15,287,078 Additions during the period: Land 281,048 225,536 131,646 Buildings & improvements 1,288,136 1,348,153 1,014,876 18,391,542 16,966,657 16,433,600 Less: Assets sold, written-off and deconsolidated 301,405 144,299 1,040,632 Balance at end of period $ 18,090,137 $ 16,822,358 $ 15,392,968 Accumulated Depreciation Balance at beginning of period $ 3,161,633 $ 2,829,862 $ 2,524,718 Additions charged to operating expenses 459,612 461,689 423,844 3,621,245 3,291,551 2,948,562 Less: Accumulated depreciation on assets sold and written-off 202,978 129,918 118,700 Balance at end of period $ 3,418,267 $ 3,161,633 $ 2,829,862

Basis of Presentation and Sig36

Basis of Presentation and Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2015
Basis of Presentation and Significant Accounting Policies [Abstract]
Basis of Presentation [Policy Text Block]	Basis of Presentation The accompanying consolidated financial statements include the accounts of Vornado and its consolidated subsidiaries, including the Operating Partnership . All inter-company amounts have been eliminated. Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America, which require us to make estimates and assumptions that affect the reported amounts of assets and liabilities , disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates . Certain prior year balances have been reclassified in order to conform to the current period presentation. Beginning in the year ended December 31, 2015, we classified signage revenue within “property rentals”. For the years ended December 31, 2014 and 2013, $37,929,000 and $32,866,000, respectively, related to signage revenue has been reclassified from “fee and other income” to “property rentals” to conform to the current period presentation.
Recently Issued Accounting Literature [Policy Text Block]	Recently Issued Accounting Literature In April 2014, the Financial Accounting Standards Board (“FASB”) issued an update (“ASU 2014-08”) Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity to ASC Topic 205, Presentation of Financial Statements and ASC Topic 360, Property Plant and Equipment. Under ASU 2014-08, only disposals that represent a strategic shift that has (or will have) a major effect on the entity's results and operations would qualify as discontinued operations. In addition, ASU 2014-08 expands the disclosure requirements for disposals that meet the definition of a discontinued operation and requires entities to disclose information about disposals of individually significant components that do not meet the definition of discontinued operations. ASU 2014-08 is effective for interim and annual reporting periods in fiscal years that began after December 15, 2014. Upon adoption of this standard on January 1, 2015, individual properties sold in the ordinary course of business are not expected to qualify as discontinued operations. Under ASU 2014-08, operating results of disposals are included in income from continuing operations, and any associated gains are now included in “n et g ain on d isposition of w holly o wned and p artially owned a ssets ” on our consolidated statements of income . Gain on sales of properties classified as discontinued operations prior to January 1, 2015 are classified in “i ncome from d iscontinued o perations ” on our consolidated statements of income . The financial results of UE and certain other retail assets are reflected in our consolidated financial statements as discontinued operations for a ll periods presented (see Note 7 – Dispositions for further details). In May 2014, the FASB issued an update ("ASU 2014-09") establishing ASC Topic 606, Revenue from Contracts with Customers . 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. ASU 2014-09 is effective for interim and annual reporting periods in fiscal years that begin after December 15, 2017. We are currently evaluating the impact of the adoption of ASU 2014-09 on our consolidated financial statements. In June 2014, the FASB issued an update (“ASU 2014-12”) to ASC Topic 718, Compensation – Stock Compensation . 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 begin after December 15, 2015. We are currently evaluating the impact of the adoption of ASU 2014-12 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. We are currently evaluating the impact of the adoption of ASU 2015-02 on our consolidated financial statements. In April 2015, the FASB issued an update (“ASU 2015-03”) Simplifying the Presentation of Debt Issuance Costs to ASC Topic 835, Interest (“ASC 835”). ASU 2015-03 requires that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability to which they relate, consistent with debt discounts, as opposed to being presented as assets. ASU 2015-03 is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2015. We elected to early adopt ASU 2015-03 effective as of December 31, 2015 with retrospective application to our December 31, 2014 consolidating balance sheet. The effect of the adoption of ASU 2015-03 was to reclassify debt i ssuance costs of approximately $79 , 987 ,000 as of December 31, 2014 from “deferred leasing and financing costs , net ” to a contra account as a deduction from the related debt liabilities . There was no effect on our consolidated statements of income. In August 2015, the FASB issued an update (“ASU 2015-15”) Interest – Imputation of Interest to ASC 835. For debt issuance costs related to line-of-credit arrangements, ASU 2015-15 allows entities to present debt issuance costs as an asset and subsequently amortize the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. We elected to early adopt ASU 2015-15 effective as of December 31, 2015 with retrospective application to our December 31, 2014 balance sheet. These debt issuance costs were $ 7,720,000 and $11,549,000 as of December 31, 2015 and 2014, respectively, and are included as a component of “other assets”. 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 (“ASC 825”). 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.
Real Estate [Policy Text Block]	Real Estate: Real estate is carried at cost, net of accumulated depreciation and amortization. Betterments, major renewals and certain costs directly related to the improvement and leasing of real estate are capitalized. Maintenance and repairs are expensed as incurred. For redevelopment of existing operating properties, the net book value of the existing property under redevelopment plus the cost for the construction and improvements incurred in connection with the redevelopment are capitalized to the extent the capitalized costs of the property do not exceed the estimated fair value of the redeveloped property when complete. If the cost of the redeveloped property, including the net book value of the existing property, exceeds the estimated fair value of redeveloped property, the excess is charged to expense. Depreciation is recognized on a straight-line basis over estimated useful lives which range from 7 to 40 years. Tenant allowances are amortized on a straight-line basis over the lives of the related leases, which approximate the useful lives of the assets. Additions to real estate include interest and debt expense capitalized during construction of $ 59 , 305 ,000 and $ 6 2, 786 , 000 for the years ended December 31, 2015 and 2014, respectively . Upon the acquisition of real estate, we assess the fair value of acquired assets (including land, buildings and improvements, identified intangibles, such as acquire d above and below-market leases, acquired in-place leases and tenant relationships) and acquired liabilities and we allocate the purchase price based on these assessments. We assess fair value based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including historical operating results, known trends, and market/economic conditions. We record acquired intangible assets (including acquired above-market leases, acquired in-place leases and tenant relationships) and acquired intangible liabilities (including below–market leases) at their estimated fair value separate and apart from goodwill. We amortize identified intangibles that have finite lives over the period they are expected to contribute directly or indirectly to the future cash flows of the property or business acquired. Our properties, including any related intangible assets, are individually reviewed for impairment whenever events or changes in circumstances indicat e that the carrying amount may not be recoverable. An impairment exists when the carrying amount of an asset exceeds the aggregate projected future cash flows over the anticipated holding period on an undiscounted basis. An impairment loss is measured based on the excess of the property's carrying amoun t over its estimated fair value. Impairment analyses are based on our current plans, intended holding periods and available market information at the time the analyses are prepared. If our estimates of the projected future cash flows, anticipated holding periods, or market conditions change, our evaluation of impairment losses may be different and such differences could be material to our consolidated financial statements. The evaluation of anticipated cash flows is subjective and is based, in part, on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results. Plans to hold properties over longer periods decrease the likelihood of recording impairment losses.
Partially Owned Entities [Policy Text Block]	Partially Owned Entities: We consolidate entities in which we have a controlling financial interest. In determining whether we have a controlling financial interest in a partially owned entity and the requirement to consolidate the accounts of that entity, we consider factors such as ownership interest, board representation, management representation, authority to make decisions, and contractual and substantive participating rights of the partners/members as well as whether the entity is a variable interest entity (“VIE”) and we are the primary beneficiary. We are deemed to be the primary beneficiary of a VIE when we have ( i ) the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and (ii) the obligation to absorb losses or receive benefits that could potentially be significant to the VIE . We generally do not control a partially owned entity if the entity is not considered a VIE and the approval of all of the partners/members is contractually required with respect to major decisions, such as operating and capital budgets, the sale, exchange or other disposition of real property, the hiring of a chief executive officer, the commencement, compromise or settlement of any lawsuit, legal proceeding or arbitration or the placement of new or additional financing se cured by assets of the venture. We account for investments under the equity method when the requirements for consolidation are not met, and we have significant influence over the operations of the investee. Equity method investments are initially recorded at cost and subsequently adjusted for our share of net income or loss and cash contributions and distributions each period . Investments that do not qualify for consolidation or equity method accounting are acco unted for on the cost method. I nvestments in partially owned entities are reviewed for impairment whenever events or changes in circumstances indicat e that the carrying amount may not be recoverable. An impairment loss is measured based on the excess of the carrying amount of an investment over its estimated fair value. Impairment analyses are based on current plans , intended holding periods and available information at the time the analyses are prepared.
Cash And Cash Equivalents [Policy Text Block]	Cash and Cash Equivalents: Cash and cash equivalents consist of highly liquid investments with original maturities of three months or less and are carried at cost, which approximates fair value due to their short-term maturities . The majority of our cash and cash equivalents consists of ( i ) deposits at major commercial banks , which may at times exceed the Federal Deposit Insurance Corporation limit , (ii) United States Treasury Bills, and (iii) Certificate of D eposits placed through an A ccount Registry S ervice (“CDARS”) . To date, we have not experienced any losses on our invested cash.
Restricted Cash [Policy Text Block]	Restricted Cash: Restricted cash consists of security deposits, cash restricted for the purpose s of facilitating a Section 1031 Like-Kind exchange, cash restricted in connection with our deferred compensation plan and cash escrowed under loan agreements for debt service, real estate taxes, property insurance and capital improvements .
Allowance For Doubtful Accounts [Policy Text Block]	Allowance for Doubtful Accounts: We periodically evaluate the collectibility of amounts due from tenants and maintain an allowance for doubtful accounts for estimated losses resulting from the inability of tenants to make required payments under the lease agreements. We also maintain an allowance for receivables arising from the straight-lining of rents. This receivable arises from earnings recognized in excess of amounts currently due under the lease agreements. Management exercises judgment in establishing these allowances and considers payment history and current credit status in developing these estimates.
Deferred Charges [Policy Text Block]	Deferred Charges: Direct financing costs are deferred and amortized over the terms of the related agreements as a component of interest expense. Direct costs related to successful leasing activities are capitalized and amortized on a straight line basis over the lives of the related leases. All other deferred charges are amortized on a straight line basis, which approximates the effective interest rate method, in accordance with the terms of the agreements to which they relate.
Revenue Recognition [Policy Text Block]	Revenue Recognition: We have the following revenue sources and revenue recognition policies: • Base Rent — income arising from tenant leases. These rents are recognized over the non-cancelable term of the related leases on a straight-line basis which includes the effects of rent steps and rent abatements under the leases. We commence rental revenue recognition when the tenant takes possession of the leased space and the leased space is substantially ready for its intended use. In addition, in circumstances where we provide a tenant improvement allowance for improvements that are owned by the tenant, we recognize the allowance as a reduction of rental revenue on a straight-line basis over the term of the lease. • Percentage Rent — income arising from retail tenant leases that is contingent upon tenant s ales exceeding defined threshold s . These rents are recognized only after the contingency has been removed (i.e., when tenant sales thresholds have been achieved). • Hotel Revenue — income arising from the operation of the Hotel Pennsylvania which consists of rooms revenue, food and beverage revenue, and banquet revenue. Income is recognized when rooms are occupied. Food and beverage and banquet revenue is recognized when the services have been rendered. • Trade Shows Revenue — income arising from the operation of trade shows, including rentals of booths. This revenue is recognized when the trade shows have occurred. • Expense Reimbursements — revenue arising from tenant leases which provide for the recovery of all or a portion of the operating expenses and real estate taxes of the respective property. This revenue is accrued in the same periods as the expenses are incurred. • Management, Leasing and Other Fees — income arising from contractual agreements with third parties or with partially owned entities. This revenue is recognized as the related services are performed under the respective agreement s.
Derivative Instruments and Hedging Activities [Policy Text Block]	Derivative Instruments and Hedging Activities: ASC 815, Derivatives and Hedging , as amended, establishes accounting and reporting standards for derivative instruments, including certain derivative instruments embedded in other contracts, and for hedging activities. As of December 31, 2015 and 2014, our derivative instruments consisted of two and one interest rate swap s , respectively . We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. For derivatives designated as fair value hedges, changes in the fair value of the derivative and the hedged item related to the hedged risk are recognized in earnings. For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is initially reported in other comprehensive income (loss) (outside of earnings) and subsequently reclassified to earnings when the hedged transaction affects earnings, and the ineffective portion of changes in the fair value of the derivative is recognized directly in earnings. We assess the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows of the derivative hedging instrument with the changes in fair value or cash flows of the designated hedged item or transaction. For derivatives not designated as hedges, changes in fair value are recognized in earnings.
Income Taxes [Policy Text Block]	Income Taxes: We operate in a manner intended to enable us to continue to qualify as a REIT under Sections 856 -860 of the Internal Revenue Code of 1986, as amended. Under those sections, a REIT which distributes at least 90% of its REIT taxable income as a dividend to its shareholders each year and which meets certain other conditions will not be taxed on that portion of its taxable income which is distributed to its shareholders. We distribute to our shareholders 100% of our taxable income and therefore, no provision for Federal income taxes is required. Dividends distributed for the year ended December 31, 2015, were characterized, for federal income tax purposes, as long-term capital gain income. Dividends distributed for the year s ended December 31, 2014 and 2013 , were characterized, for federal income tax purposes, as ordinary income . We have elected to treat certain consolidated subsidiaries, and may in the future elect to treat newly formed subsidiaries, as taxable REIT subsidiaries pursuant to an amendment to the Internal Revenue Code that became effective January 1, 2001. Taxable REIT subsidiaries may participate in non-real estate related activities and/or perform non-customary services for tenants and are subject to Federal and State income tax at regular corporate tax rates.
Marketable Securities [Policy Text Block]	Our portfolio of marketable securities is comprised of equity securities that are classified as available - for - sale. Available - for - sale securities are presented on our consolidated balance sheets at fair value. Unrealized g ains and losses resulting from the mark-to-market of these securities are included in “other comprehensive income (loss) .” Realized g ains and losses are recognized in earnings only upon the sale of the securities and are recorded based on the weighted average cost of such securities . We evaluate our portfolio of marketable securities for impairment each reporting period. For each of the securities in our portfolio with unrealized losses, we review the underlying cause of the decline in value and the estimated recovery period, as well as the severity and duration of the decline. In our evaluation, we consider our ability and intent to hold these investments for a reasonable period of time sufficient for us to recover our cost basis. We also evaluate the near-term prospects for each of these investments in relation to the severity and duration of the decline.
Redeemable Noncontrolling Interests [Policy Text Block]	Redeemable noncontrolling interests on our consolidated balance sheets are primarily comprised 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. Class A units may be tendered for redemption to the Operating Partnership for cash; we, at our option, may assume that obligation and pay the holder either cash or Vornado common shares on a one-for-one basis. Because the number of Vornado common shares outstanding at all times equals the number of Class A units owned by Vornado, the redemption value of each Class A unit is equivalent to the market value of one Vornado common share, and the quarterly distribution to a Class A unitholder is equal to the quarterly dividend paid to a Vornado common shareholder. Redeemable noncontrolling interests exclude our Series G -1 through G-4 c onvertible p referred units and Series D-13 c umulative r edeemable p referred units, as they are accounted for as liabilities in accordance with ASC 480, Distinguishing Liabilities and Equity , because of their possible settlement by issuing a variable number of Vornado common shares.

Basis of Presentation and Sig37

Basis of Presentation and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Basis of Presentation and Significant Accounting Policies [Abstract]
Reconciliation Of Net Income Attributable To Common Shareholders To Estimated Taxable Income [Table Text Block]	(Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Net income attributable to common shareholders $ 679,856 $ 783,388 $ 392,034 Book to tax differences (unaudited): Tangible Property Regulations (1) (575,618) - - Sale of real estate and other capital transactions 320,326 (477,061) (324,936) Depreciation and amortization 227,297 219,403 155,401 Straight-line rent adjustments (144,727) (77,526) (64,811) Stock options (8,278) (9,566) 4,884 Earnings of partially owned entities (5,299) 71,960 339,376 Impairment losses on marketable equity securities - - 37,236 Other, net (5,833) 1,260 36,186 Estimated taxable income (unaudited) $ 487,724 $ 511,858 $ 575,370 (1) Represents one-time deductions pursuant to the implementation of the Tangible Property Regulations issued by the Internal Revenue Service.

Real Estate Fund Investments (T

Real Estate Fund Investments (Tables)	12 Months Ended
	Dec. 31, 2015
Real Estate Fund Investments [Abstract]
Schedule Of Income And Loss From The Fund [Table Text Block]	(Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Net investment income $ 16,329 $ 12,895 $ 8,943 Net realized gains on exited investments 2,757 76,337 8,184 Net unrealized gains on held investments 54,995 73,802 85,771 Income from real estate fund investments 74,081 163,034 102,898 Less income attributable to noncontrolling interests (40,117) (92,728) (53,427) Income from real estate fund investments attributable to Vornado (1) $ 33,964 $ 70,306 $ 49,471 (1) Excludes $2,939, $2,562, and $2,721 of management and leasing fees in the years ended December 31, 2015, 2014 and 2013, respectively, which are included as a component of "fee and other income" on our consolidated statements of income.

Marketable Securities and Der39

Marketable Securities and Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2015
Marketable Securities and Derivative Instruments [Abstract]
Unrealized Gain (Loss) on Investments [Table Text Block]	Below is a summary of our marketable securities portfolio as of December 31, 2015 and 2014. As of December 31, 2015 As of December 31, 2014 GAAP Unrealized GAAP Unrealized Fair Value Cost Gain Fair Value Cost Gain Equity securities: Lexington Realty Trust $ 147,752 $ 72,549 $ 75,203 $ 202,789 $ 72,549 $ 130,240 Other 3,245 - 3,245 3,534 - 3,534 $ 150,997 $ 72,549 $ 78,448 $ 206,323 $ 72,549 $ 133,774

Investments in Partially Owne40

Investments in Partially Owned Entities (Tables)	12 Months Ended
	Dec. 31, 2015
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Summarized Financial Information [Table Text Block]	(Amounts in thousands) Balance as of December 31, 2015 2014 Balance Sheet: Assets $ 25,526,000 $ 21,389,000 Liabilities 21,162,000 17,986,000 Noncontrolling interests 146,000 104,000 Equity 4,218,000 3,299,000 For the Year Ended December 31, 2015 2014 2013 Income Statement: Total revenue $ 13,423,000 $ 13,620,000 $ 14,092,000 Net loss (224,000) (434,000) (368,000)
Equity Method Investments [Table Text Block]	(Amounts in thousands) Percentage Ownership at As of December 31, December 31, 2015 2015 2014 Investments: Partially owned office buildings (1) Various $ 909,782 $ 760,749 Alexander’s 32.4 % 133,568 131,616 PREIT 8.1 % 133,375 - India real estate ventures 4.1%-36.5% 48,310 76,752 UE 5.4 % 25,351 - Toys (2) 32.5 % - - Other investments (3) Various 300,036 271,372 $ 1,550,422 $ 1,240,489 (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) Pursuant to Rule 4-08(g) of Regulation S-X, in 2014 Toys was considered a significant subsidiary where as in 2015 it was not. As of November 1, 2014, Toys had total assets of $11,267,000, total liabilities of $10,377,000, noncontrolling interests of $82,000 and equity of $808,000. (3) Includes interests in Independence Plaza, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street and others. (Amounts in thousands) Percentage Ownership at For the Year Ended December 31, December 31, 2015 2015 2014 2013 Our Share of Net (Loss) Income: Alexander's: Equity in net income 32.4 % $ 24,209 $ 21,287 $ 17,721 Management, leasing and development fees 6,869 8,722 6,681 31,078 30,009 24,402 UE (see page 109 for details): Equity in net earnings 5.4 % 2,430 - - Management fees 1,964 - - 4,394 - - Toys: Equity in net loss (1) 32.5 % - (4,691) (128,919) Non-cash impairment losses (see page 108 for details) - (75,196) (240,757) Management fees 2,500 6,331 7,299 2,500 (73,556) (362,377) Partially owned office buildings (2) Various (23,556) 93 (4,212) India real estate ventures (3) 4.1%-36.5% (18,746) (8,309) (3,533) PREIT (see page 109 for details) 8.1 % (7,450) - - LNR (4) n/a - - 18,731 Lexington (5) n/a - - (979) Other investments (6) Various (850) (8,098) (12,914) $ (12,630) $ (59,861) $ (340,882) (1) Pursuant to Rule 4-08(g) of Regulation S-X, in 2014 and 2013 Toys was considered a significant subsidiary where as in 2015 it was not. For the twelve months ended November 1, 2014, Toys’ total revenue was $12,645,000 and net loss attributable to Toys was $343,000. For the twelve months ended November 2, 2013, Toys’ total revenue was $13,046,000 and net loss attributable to Toys was $396,000. (2) 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. In 2015, we recognized net losses of $39,600 from our 666 Fifth Avenue (Office) joint venture as a result of our share of depreciation expense. Also in 2015, we recognized our $12,800 share of a write-off of a below market lease liability related to a tenant vacating at 650 Madison Avenue. In 2014, we recognized our $14,500 share of accelerated depreciation from our West 57th Street joint ventures in connection with the change in estimated useful life of those properties. (3) Includes a $14,806 and $5,771 non-cash impairment loss in 2015 and 2014, respectively. (4) In 2013, we recognized net income of $18,731, comprised of (i) $42,186 for our share of LNR’s net income and (ii) a $27,231 non-cash impairment loss and (iii) a $3,776 net gain on sale. (5) In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable security - available for sale. (6) Includes interests in Independence Plaza, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street and others. In 2014, we recognized a $10,263 non-cash charge, comprised of a $5,959 impairment loss and a $4,304 loan loss reserve, on our equity and debt investments in Suffolk Downs.
Schedule of debt of partially owned entities [Table Text Block]	(Amounts in thousands) Percentage Interest Ownership at Rate at 100% Partially Owned Entities’ December 31, December 31, Debt at December 31, 2015 Maturity 2015 2015 2014 Toys: Notes, loans and mortgages payable 32.5 % 2016-2021 7.35 % $ 5,619,710 $ 5,748,350 Partially owned office buildings (1) : Mortgages payable Various 2016-2023 5.57 % $ 3,771,255 $ 3,691,274 PREIT: Mortgages payable 8.1 % 2016-2025 4.04 % $ 1,852,270 $ - UE: Mortgages payable 5.4 % 2018-2034 4.15 % $ 1,246,155 $ - Alexander's: Mortgages payable 32.4 % 2016-2022 1.69 % $ 1,053,262 $ 1,032,780 India Real Estate Ventures: TCG Urban Infrastructure Holdings mortgages payable 25.0 % 2016-2026 12.06 % $ 185,607 $ 183,541 Other (2) : Mortgages payable Various 2016-2023 4.27 % $ 1,316,641 $ 1,314,077 (1) Includes 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue, 512 West 22nd Street and others. (2) Includes Independence Plaza, Fashion Center Mall, 50-70 West 93rd Street and others.

Dispositions (Tables)

Dispositions (Tables)	12 Months Ended
	Dec. 31, 2015
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 December 31, 2015 December 31, 2014 Assets related to discontinued operations: Real estate, net $ 29,561 $ 2,028,677 Other assets 7,459 205,451 $ 37,020 $ 2,234,128 Liabilities related to discontinued operations: Mortgages payable, net $ - $ 1,278,182 Other liabilities (primarily deferred revenue in 2014) 12,470 222,827 $ 12,470 $ 1,501,009 (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Income from discontinued operations: Total revenues $ 27,831 $ 395,786 $ 502,061 Total expenses 17,651 274,107 310,364 10,180 121,679 191,697 Net gains on sales of real estate 65,396 507,192 414,502 Transaction related costs (primarily UE spin off) (22,972) (14,956) - Impairment losses (256) (26,518) (37,170) Net gain on sale of asset other than real estate - - 1,377 Pretax income from discontinued operations 52,348 587,397 570,406 Income tax expense (86) (1,721) (2,311) Income from discontinued operations $ 52,262 $ 585,676 $ 568,095 Cash flows related to discontinued operations: Cash flows from operating activities $ (33,462) $ 123,837 $ 279,436 Cash flows from investing activities 346,865 (180,019) (117,497)

Identified Intangible Assets 42

Identified Intangible Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Schedule of Identified Intangible Assets and Intangible Liabilities [Table Text Block]	(Amounts in thousands) Balance as of December 31, 2015 2014 Identified intangible assets: Gross amount $ 415,261 $ 424,976 Accumulated amortization (187,360) (199,821) Net $ 227,901 $ 225,155 Identified intangible liabilities (included in deferred revenue): Gross amount $ 643,488 $ 657,976 Accumulated amortization (325,340) (329,775) Net $ 318,148 $ 328,201
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) 2016 $ 52,359 2017 44,501 2018 43,028 2019 31,011 2020 23,320
Other Identified Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(Amounts in thousands) 2016 $ 29,349 2017 24,427 2018 20,063 2019 15,779 2020 12,345
Tenant Under Ground Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(Amounts in thousands) 2016 $ 1,832 2017 1,832 2018 1,832 2019 1,832 2020 1,832

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Schedule of Debt [Table Text Block]	(Amounts in thousands) Weighted Average Interest Rate at Balance at December 31, December 31, 2015 2015 2014 Mortgages Payable: Fixed rate 4.29 % $ 6,356,634 $ 6,497,286 Variable rate 2.14 % 3,258,204 1,763,769 Total 3.56 % 9,614,838 8,261,055 Deferred financing costs, net and other (101,125) (73,212) Total, net $ 9,513,713 $ 8,187,843 Unsecured Debt: Senior unsecured notes 3.68 % $ 850,000 $ 1,350,000 Deferred financing costs, net and other (5,841) (7,506) Senior unsecured notes, net 844,159 1,342,494 Unsecured term loan 1.40 % 187,500 - Deferred financing costs, net and other (4,362) - Unsecured term loan, net 183,138 - Unsecured revolving credit facilities 1.38 % 550,000 - Total, net $ 1,577,297 $ 1,342,494
Schedule of Maturities of Long-Term Debt [Table Text Block]	(Amounts in thousands) Senior Unsecured Debt and Unsecured Revolving Credit Mortgages Payable Facilities Year Ending December 31, 2016 $ 1,095,366 $ 550,000 2017 411,113 - 2018 441,354 - 2019 379,122 450,000 2020 2,835,451 187,500 Thereafter 4,452,432 400,000

Redeemable Noncontrolling Int44

Redeemable Noncontrolling Interests (Tables)	12 Months Ended
	Dec. 31, 2015
Redeemable Noncontrolling Interests [Abstract]
Operating Partnership Units Held By Third Parties [Table Text Block]	(Amounts in thousands, except units and Preferred or per unit amounts) Balance as of Units Outstanding at Per Unit Annual December 31, December 31, Liquidation Distribution Unit Series 2015 2014 2015 2014 Preference Rate Common: Class A $ 1,223,793 $ 1,336,780 12,242,820 11,356,550 n/a $ 2.52 Perpetual Preferred: (1) 5.00% D-16 Cumulative Redeemable $ 1,000 $ 1,000 1 1 $ 1,000,000.00 $ 50,000.00 3.25% D-17 Cumulative Redeemable $ 4,428 $ - 177,100 - $ 25.00 $ 0.8125 (1) Holders may tender units for redemption to the Operating Partnership for cash at their stated redemption amount; we, at our option, may assume that obligation and pay the holders either cash or Vornado preferred shares on a one-for-one basis. These units are redeemable at our option at any time.
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, 2013 $ 1,003,620 Net income 47,613 Other comprehensive income 1,323 Distributions (33,469) Redemption of Class A units for common shares, at redemption value (27,273) Adjustments to carry redeemable Class A units at redemption value 315,276 Other, net 30,690 Balance at December 31, 2014 1,337,780 Net income 43,231 Other comprehensive income (2,866) Distributions (30,263) Redemption of Class A units for common shares, at redemption value (48,230) Adjustments to carry redeemable Class A units at redemption value (192,464) Issuance of Class A units 80,000 Issuance of Series D-17 Preferred Units 4,428 Other, net 37,605 Balance at December 31, 2015 $ 1,229,221

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Shareholders' Equity [Abstract]
Schedule Of Preferred Units [Table Text Block]	(Amounts in thousands, except share and Balance as of Shares Outstanding at Per Share Annual per share amounts) December 31, December 31, Liquidation Dividend Preferred Shares 2015 2014 2015 2014 Preference Rate (1) Convertible Preferred: 6.5% Series A: authorized 83,977 shares (2) $ 1,321 $ 1,393 26,629 28,939 $ 50.00 $ 3.25 Cumulative Redeemable: 6.625% Series G: authorized 8,000,000 shares (3) 193,135 193,135 8,000,000 8,000,000 $ 25.00 $ 1.65625 6.625% Series I: authorized 10,800,000 shares (3) 262,379 262,379 10,800,000 10,800,000 $ 25.00 $ 1.65625 6.875% Series J: authorized 9,850,000 shares (3) 238,842 238,842 9,850,000 9,850,000 $ 25.00 $ 1.71875 5.70% Series K: authorized 12,000,000 shares (3) 290,971 290,971 12,000,000 12,000,000 $ 25.00 $ 1.425 5.40% Series L: authorized 12,000,000 shares (3) 290,306 290,306 12,000,000 12,000,000 $ 25.00 $ 1.35 $ 1,276,954 $ 1,277,026 52,676,629 52,678,939 (1) Dividends on preferred shares are cumulative and are payable quarterly in arrears. (2) Redeemable at our option under certain circumstances, at a redemption price of 1.5934 and 1.4334 common shares per Series A Preferred Share plus accrued and unpaid dividends through the date of redemption, or convertible at any time at the option of the holder for 1.5934 and 1.4334 common shares per Series A Preferred Share, as of December 31, 2015 and 2014, respectively. (3) Redeemable at our option at a redemption price of $25.00 per share, plus accrued and unpaid dividends through the date of redemption.
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	(Amounts in thousands) For the Year Ended December 31, 2015 Securities Pro rata share of Interest available- nonconsolidated rate Total for-sale subsidiaries' OCI swap Other Balance as of December 31, 2014 $ 93,267 $ 133,774 $ (8,992) $ (25,803) $ (5,712) Net current period OCI (46,346) (55,326) (327) 6,435 2,872 Balance as of December 31, 2015 $ 46,921 $ 78,448 $ (9,319) $ (19,368) $ (2,840)

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2015
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]	(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 (75% of which is attributable to noncontrolling interests) 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 $ - (Amounts in thousands) As of December 31, 2014 Total Level 1 Level 2 Level 3 Marketable securities $ 206,323 $ 206,323 $ - $ - Real estate fund investments (75% of which is attributable to noncontrolling interests) 513,973 - - 513,973 Deferred compensation plan assets (included in other assets) 117,284 53,969 - 63,315 Total assets $ 837,580 $ 260,292 $ - $ 577,288 Mandatorily redeemable instruments (included in other liabilities) $ 55,097 $ 55,097 $ - $ - Interest rate swap (included in other liabilities) 25,797 - 25,797 - Total liabilities $ 80,894 $ 55,097 $ 25,797 $ -
Non-financial Assets Measured at Fair Value on a Nonrecurring Basis [Table Text Block]	(Amounts in thousands) As of December 31, 2015 Total Level 1 Level 2 Level 3 Real estate assets $ - $ - $ - $ - (Amounts in thousands) As of December 31, 2014 Total Level 1 Level 2 Level 3 Real estate assets $ 4,848 $ - $ - $ 4,848
Schedule Of Carrying Amounts And Fair Values Of Financial Instruments [Table Text Block]	(Amounts in thousands) As of December 31, 2015 As of December 31, 2014 Carrying Fair Carrying Fair Amount Value Amount Value Cash equivalents $ 1,295,980 $ 1,296,000 $ 749,418 $ 749,000 Mezzanine loan receivable (included in other assets) - - 16,748 17,000 $ 1,295,980 $ 1,296,000 $ 766,166 $ 766,000 Debt: Mortgages payable $ 9,614,838 $ 9,306,000 $ 8,261,055 $ 8,224,000 Senior unsecured notes 850,000 868,000 1,350,000 1,385,000 Unsecured term loan 187,500 187,500 - - Unsecured revolving credit facilities 550,000 550,000 - - Total $ 11,202,338 $ 10,911,500 $ 9,611,055 $ 9,609,000
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]	Weighted Average (based on fair Unobservable Quantitative Input Range value of investments) Discount rates 12.0% to 14.9% 13.6% Terminal capitalization rates 4.8% to 6.1% 5.5%
Summary of Changes in Level 3 Plan Assets [Table Text Block]	(Amounts in thousands) For The Year Ended December 31, 2015 2014 Beginning balance $ 513,973 $ 667,710 Purchases 95,010 3,392 Dispositions / Distributions (91,450) (307,268) Net unrealized gains 54,995 73,802 Net realized gains 2,757 76,337 Other, net (524) - Ending balance $ 574,761 $ 513,973
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]	(Amounts in thousands) For The Year Ended December 31, 2015 2014 Beginning balance $ 63,315 $ 68,782 Purchases 9,062 14,162 Sales (13,252) (24,951) Realized and unrealized gains (501) 3,415 Other, net 562 1,907 Ending balance $ 59,186 $ 63,315

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2015
Stock-based Compensation [Abstract]
Schedule Of Sharebased Compensation Restricted Operating Partnership Units Earned [Table Text Block]	Plan Year Notional Amount Grant-Date Fair Value (1) OPP Units Earned 2015 $ 40,000,000 $ 9,120,000 To be determined in 2017 2014 50,000,000 8,202,000 To be determined in 2016 2013 40,000,000 6,814,000 85,420 2012 40,000,000 12,250,000 303,202 (1) Such amounts are being amortized into expense over a five-year period from the date of grant, using a graded vesting attribution model. In the years ended December 31, 2015, 2014 and 2013, we recognized $15,531,000, $6,185,000 and $3,226,000, respectively, of compensation expense related to OPPs. As of December 31, 2015, there was $5,087,000 of total unrecognized compensation cost related to the OPPs, which will be recognized over a weighted-average period of 1.7 years.
Schedule Of Share Based Compensation Stock Options Activity [Table Text Block]	Weighted- Weighted- Average Average Remaining Aggregate Exercise Contractual Intrinsic Shares Price Term Value Outstanding at January 1, 2015 (1) 2,965,968 $ 60.82 Granted 35,208 112.10 Exercised (160,266) 82.21 Cancelled or expired (13,340) 100.21 Outstanding at December 31, 2015 2,827,570 $ 60.06 4.0 $ 115,796,000 Options vested and expected to vest at December 31, 2015 2,826,685 $ 60.06 4.0 $ 115,788,000 Options exercisable at December 31, 2015 2,741,863 $ 59.08 3.8 $ 114,653,000 (1) Adjusted for the effect of the UE spin-off.
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Table Text Block]	December 31, 2015 2014 2013 Expected volatility 35.00 % 36.00 % 36.00 % Expected life 5.0 years 5.0 years 5.0 years Risk free interest rate 1.56 % 1.81 % 0.91 % Expected dividend yield 3.30 % 4.10 % 4.30 %
Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity [Table Text Block]	Weighted-Average Grant-Date Unvested Shares Shares Fair Value Unvested at January 1, 2015 (1) 24,478 $ 78.32 Granted 8,177 110.84 Vested (11,298) 78.08 Cancelled or expired (1,765) 88.69 Unvested at December 31, 2015 19,592 91.09 (1) Adjusted for the effect of the UE spin-off.
Schedule Of Sharebased Compensation Restricted Operating Partnership Units Activity [Table Text Block]	Weighted-Average Grant-Date Unvested Units Units Fair Value Unvested at January 1, 2015 (1) 721,662 $ 74.38 Granted 197,497 102.75 Vested (270,443) 74.22 Cancelled or expired (9,699) 83.89 Unvested at December 31, 2015 639,017 83.07 (1) Adjusted for the effect of the UE spin-off.

Fee and Other Income (Tables)

Fee and Other Income (Tables)	12 Months Ended
	Dec. 31, 2015
Fee And Other Income Tables [Abstract]
Fee and Other Income (Table)	(Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 BMS cleaning fees $ 82,113 $ 85,658 $ 66,505 Lease termination fees (1) 27,233 16,362 32,630 Management and leasing fees 16,831 19,905 23,073 Other income 38,528 33,281 33,363 $ 164,705 $ 155,206 $ 155,571 (1) The year ended December 31, 2015 includes $15,000 related to the New York Stock Exchange lease termination at 20 Broad Street. The year ended December 31, 2013 includes $19,500 from a tenant at 1290 Avenue of the Americas, of which our 70% share, net of a $1,529 write-off of the straight lining of rents, was $12,121; and $3,000 from the termination of our subsidiaries' agreements with Cuyahoga County to operate the Cleveland Medical Mart Convention Center.

Interest and Other Investment49

Interest and Other Investment Income (Loss), Net (Tables)	12 Months Ended
	Dec. 31, 2015
Interest and Other Investment Income (Loss), Net [Abstract]
Schedule Of Interest And Other Investment Income (Loss), Net [Table Text Block]	(Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Dividends on marketable securities $ 12,836 $ 12,707 $ 11,446 Interest on loans receivable 6,371 6,107 20,683 Mark-to-market of investments in our deferred compensation plan (1) 111 11,557 10,636 Losses from the disposition of investment in J.C. Penney - - (72,974) Other, net 7,660 8,381 5,322 $ 26,978 $ 38,752 $ (24,887) (1) This income is entirely offset by the 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 (Tabl

Interest and Debt Expense (Tables)	12 Months Ended
	Dec. 31, 2015
Interest and Debt Expense [Abstract]
Interest And Debt Expense [Table Text Block]	(Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Interest expense $ 405,169 $ 430,278 $ 444,412 Amortization of deferred financing costs 32,161 45,263 23,673 Capitalized interest and debt expense (59,305) (62,786) (42,303) $ 378,025 $ 412,755 $ 425,782

Income Per Share (Tables)

Income Per Share (Tables)	12 Months Ended
	Dec. 31, 2015
Income Per Share [Abstract]
Schedule Of Earnings Per Share Basic And Diluted [Text Block]	(Amounts in thousands, except per share amounts) Year Ended December 31, 2015 2014 2013 Numerator: Income (loss) from continuing operations, net of income attributable to noncontrolling interests $ 711,240 $ 312,700 $ (56,727) Income from discontinued operations, net of income attributable to noncontrolling interests 49,194 552,152 532,698 Net income attributable to Vornado 760,434 864,852 475,971 Preferred share dividends (80,578) (81,464) (82,807) Preferred unit and share redemptions - - (1,130) Net income attributable to common shareholders 679,856 783,388 392,034 Earnings allocated to unvested participating securities (81) (125) (110) Numerator for basic income per share 679,775 783,263 391,924 Impact of assumed conversions: Convertible preferred share dividends 91 97 - Numerator for diluted income per share $ 679,866 $ 783,360 $ 391,924 Denominator: Denominator for basic income per share – weighted average shares 188,353 187,572 186,941 Effect of dilutive securities (1) : Employee stock options and restricted share awards 1,166 1,075 768 Convertible preferred shares 45 43 - Denominator for diluted income per share – weighted average shares and assumed conversions 189,564 188,690 187,709 INCOME (LOSS) PER COMMON SHARE – BASIC: Income (loss) from continuing operations, net $ 3.35 $ 1.23 $ (0.75) Income from discontinued operations, net 0.26 2.95 2.85 Net income per common share $ 3.61 $ 4.18 $ 2.10 INCOME (LOSS) PER COMMON SHARE – DILUTED: Income (loss) from continuing operations, net $ 3.33 $ 1.22 $ (0.75) Income from discontinued operations, net 0.26 2.93 2.84 Net income per common share $ 3.59 $ 4.15 $ 2.09 (1) The effect of dilutive securities in the years ended December 31, 2015, 2014 and 2013 excludes an aggregate of 11,744, 11,238 and 11,752 weighted average common share equivalents, respectively, as their effect was anti-dilutive.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Schedule Of Future Base Rental [Table Text Block]	(Amounts in thousands) Year Ending December 31: 2016 $ 1,633,615 2017 1,686,056 2018 1,644,440 2019 1,496,805 2020 1,349,724 Thereafter 8,103,382
Schedule Of Future Minimum Rental Payments For Operating Leases [Table Text Block]	(Amounts in thousands) Year Ending December 31: 2016 $ 33,265 2017 34,831 2018 35,317 2019 35,826 2020 36,353 Thereafter 1,557,541
Schedule Of Future Minimum Lease Payments For Capital Leases [Table Text Block]	(Amounts in thousands) Year Ending December 31: 2016 $ 12,500 2017 12,500 2018 12,500 2019 12,500 2020 12,500 Thereafter 322,292 Total minimum obligations 384,792 Interest portion (144,792) Present value of net minimum payments $ 240,000

Summary of Quarterly Results (T

Summary of Quarterly Results (Tables)	12 Months Ended
	Dec. 31, 2015
Summary of Quarterly Results (Unaudited) [Abstract]
Schedule Of Quarterly Financial Information [Table Text Block]	(Amounts in thousands, except per share amounts) Net Income Attributable Net Income Per to Common Common Share (2) Revenues Shareholders (1) Basic Diluted 2015 December 31 $ 651,581 $ 230,742 $ 1.22 $ 1.22 September 30 627,596 198,870 1.05 1.05 June 30 616,288 165,651 0.88 0.87 March 31 606,802 84,593 0.45 0.45 2014 December 31 $ 597,010 $ 513,238 $ 2.73 $ 2.72 September 30 578,710 131,159 0.70 0.69 June 30 574,411 76,642 0.41 0.41 March 31 562,381 62,349 0.33 0.33 (1) Fluctuations among quarters resulted primarily from non-cash impairment losses, mark-to-market of derivative instruments, net gains on sale of real estate and from seasonality of business operations. (2) The total for the year may differ from the sum of the quarters as a result of weighting.

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Information [Abstract]
Schedule of Segment Information [Table Text Block]	(Amounts in thousands) For the Year Ended December 31, 2015 Total New York Washington, DC Other Total revenues $ 2,502,267 $ 1,695,925 $ 532,812 $ 273,530 Total expenses 1,742,019 1,032,015 390,921 319,083 Operating income (loss) 760,248 663,910 141,891 (45,553) (Loss) income from partially owned entities (12,630) 655 (5,083) (8,202) Income from real estate fund investments 74,081 - - 74,081 Interest and other investment income (loss), net 26,978 7,722 (262) 19,518 Interest and debt expense (378,025) (194,278) (68,727) (115,020) Net gain on disposition of wholly owned and partially owned assets 251,821 142,693 102,404 6,724 Income (loss) before income taxes 722,473 620,702 170,223 (68,452) Income tax benefit (expense) 84,695 (4,379) (317) 89,391 Income from continuing operations 807,168 616,323 169,906 20,939 Income from discontinued operations 52,262 - - 52,262 Net income 859,430 616,323 169,906 73,201 Less net income attributable to noncontrolling interests (98,996) (13,022) - (85,974) Net income (loss) attributable to Vornado 760,434 603,301 169,906 (12,773) Interest and debt expense (2) 469,843 248,724 82,386 138,733 Depreciation and amortization (2) 664,637 394,028 179,788 90,821 Income tax (benefit) expense (2) (85,379) 4,766 (1,610) (88,535) EBITDA (1) $ 1,809,535 $ 1,250,819 (3) $ 430,470 (4) $ 128,246 (5) Balance Sheet Data: Real estate, at cost $ 18,090,137 $ 10,577,078 $ 4,544,842 $ 2,968,217 Investments in partially owned entities 1,550,422 1,195,122 100,511 254,789 Total assets 21,143,293 12,257,774 4,536,895 4,348,624 See notes on pages 136 and 137. (Amounts in thousands) For the Year Ended December 31, 2014 Total New York Washington, DC Other Total revenues $ 2,312,512 $ 1,520,845 $ 537,151 $ 254,516 Total expenses 1,622,619 946,466 358,019 318,134 Operating income (loss) 689,893 574,379 179,132 (63,618) (Loss) income from partially owned entities (59,861) 20,701 (3,677) (76,885) Income from real estate fund investments 163,034 - - 163,034 Interest and other investment income, net 38,752 6,711 183 31,858 Interest and debt expense (412,755) (183,427) (75,395) (153,933) Net gain on disposition of wholly owned and partially owned assets 13,568 - - 13,568 Income (loss) before income taxes 432,631 418,364 100,243 (85,976) Income tax expense (9,281) (4,305) (242) (4,734) Income (loss) from continuing operations 423,350 414,059 100,001 (90,710) Income from discontinued operations 585,676 463,163 - 122,513 Net income 1,009,026 877,222 100,001 31,803 Less net income attributable to noncontrolling interests (144,174) (8,626) - (135,548) Net income (loss) attributable to Vornado 864,852 868,596 100,001 (103,745) Interest and debt expense (2) 654,398 241,959 89,448 322,991 Depreciation and amortization (2) 685,973 324,239 145,853 215,881 Income tax expense (2) 24,248 4,395 288 19,565 EBITDA (1) $ 2,229,471 $ 1,439,189 (3) $ 335,590 (4) $ 454,692 (5) Balance Sheet Data: Real estate, at cost $ 16,822,358 $ 9,732,818 $ 4,383,418 $ 2,706,122 Investments in partially owned entities 1,240,489 1,036,130 102,635 101,724 Total assets 21,157,980 10,706,476 4,300,628 6,150,876 (Amounts in thousands) For the Year Ended December 31, 2013 Total New York Washington, DC Other Total revenues $ 2,299,176 $ 1,470,907 $ 541,161 $ 287,108 Total expenses 1,624,625 910,498 347,686 366,441 Operating income (loss) 674,551 560,409 193,475 (79,333) (Loss) income from partially owned entities (340,882) 15,527 (6,968) (349,441) Income from real estate fund investments 102,898 - - 102,898 Interest and other investment (loss) income, net (24,887) 5,357 129 (30,373) Interest and debt expense (425,782) (181,966) (102,277) (141,539) Net gain on disposition of wholly owned and partially owned assets 2,030 - - 2,030 (Loss) income before income taxes (12,072) 399,327 84,359 (495,758) Income tax benefit (expense) 8,717 (2,794) 14,031 (2,520) (Loss) income from continuing operations (3,355) 396,533 98,390 (498,278) Income from discontinued operations 568,095 160,314 - 407,781 Net income (loss) 564,740 556,847 98,390 (90,497) Less net income attributable to noncontrolling interests (88,769) (10,786) - (77,983) Net income (loss) attributable to Vornado 475,971 546,061 98,390 (168,480) Interest and debt expense (2) 758,781 236,645 116,131 406,005 Depreciation and amortization (2) 732,757 293,974 142,409 296,374 Income tax expense (benefit) (2) 26,371 3,002 (15,707) 39,076 EBITDA (1) $ 1,993,880 $ 1,079,682 (3) $ 341,223 (4) $ 572,975 (5) Balance Sheet Data: Real estate, at cost $ 15,392,968 $ 8,422,297 $ 4,243,048 $ 2,727,623 Investments in partially owned entities 1,159,803 904,278 100,543 154,982 Total assets 20,018,210 9,214,055 4,098,338 6,705,817 See notes on page 136 and 137. Notes to preceding tabular information: (1) EBITDA represents "Earnings Before Interest, Taxes, Depreciation and Amortization." 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 in the reconciliation of net income 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 Year Ended December 31, 2015 2014 2013 Office $ 661,579 $ 622,818 $ 612,009 Retail 358,379 281,428 246,808 Residential 22,266 21,907 20,420 Alexander's 42,858 41,746 42,210 Hotel Pennsylvania 23,044 30,753 30,723 Net gains on sale of real estate (a) 142,693 440,537 127,512 Total New York $ 1,250,819 $ 1,439,189 $ 1,079,682 (a) Net gains on sale of real estate are related to 20 Broad Street in 2015, 1740 Broadway in 2014, and 866 UN Plaza in 2013. (4) The elements of "Washington, DC" EBITDA are summarized below. (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Office, excluding the Skyline properties $ 264,864 $ 266,859 $ 268,373 Skyline properties 24,224 27,150 29,499 Net gain on sale of 1750 Pennsylvania Avenue 102,404 - - Total Office 391,492 294,009 297,872 Residential 38,978 41,581 43,351 Total Washington, DC $ 430,470 $ 335,590 $ 341,223
Details of Other EBITDA [Table Text Block]	Notes to preceding tabular information: (5) The elements of "Other" EBITDA are summarized below. (Amounts in thousands) For the Year Ended December 31, 2015 2014 2013 Our share of real estate fund investments: Income before net realized/unrealized gains $ 8,611 $ 8,056 $ 7,752 Net realized/unrealized gains on investments 14,657 37,535 23,489 Carried interest 10,696 24,715 18,230 Total 33,964 70,306 49,471 theMart and trade shows 79,159 79,636 74,270 555 California Street 49,975 48,844 42,667 India real estate ventures 3,933 6,434 5,841 Our share of Toys (a) 2,500 103,632 (12,081) Other investments 38,141 16,896 45,856 207,672 325,748 206,024 Corporate general and administrative expenses (b)(c) (106,416) (94,929) (94,904) Investment income and other, net (b) 26,385 31,665 46,525 Gains on sale of partially owned entities and other 37,666 13,000 - UE and residual retail properties discontinued operations 28,314 245,679 541,516 Our share of impairment loss on India real estate ventures (14,806) (5,771) - Acquisition and transaction related costs (12,511) (16,392) (24,857) Net gain on sale of marketable securities, land parcels and residential condominiums 6,724 13,568 56,868 Impairment loss and loan loss reserve on investment in Suffolk Downs (1,551) (10,263) - Losses from the disposition of investment in J.C. Penney - - (127,888) Severance costs (primarily reduction in force at theMart) - - (5,492) Net income attributable to noncontrolling interests in the Operating Partnership (43,231) (47,613) (24,817) $ 128,246 $ 454,692 $ 572,975 (a) As a result of our investment being reduced to zero, we suspended equity method accounting in the third quarter of 2014 (see Note 6 - Investments in Partially Owned Entities ). The years ended December 31, 2014 and 2013 include an impairment loss of $75,196 and $240,757, respectively. (b) The amounts in these captions (for this table only) exclude income/expense from the mark-to-market of our deferred compensation plan of $111, $11,557 and $10,636 for the years ended December 31, 2015, 2014 and 2013, respectively. (c) The year ended December 31, 2015 includes $6,217 from the acceleration of the recognition of compensation expense related to 2013-2015 Out-Performance Plans due to the modification of the vesting criteria of awards such that they will fully vest at age 65. The accelerated expense will result in lower general and administrative expense for 2016 of $2,940 and $3,277 thereafter.

Organization and Business (Deta

Organization and Business (Details) ft² in Millions	Jan. 15, 2015USD ($)Propertiesshares	Dec. 31, 2015USD ($)ft²PropertiesResidentialUnitsRooms	Dec. 31, 2014USD ($)Properties	Dec. 31, 2013USD ($)
Organization and Business [Abstract]
Common limited partnership interest in the Operating Partnership		93.70%
Real Estate Properties [Line Items]
Cash Considerations Transferred During Spin Off (in US Dollars) | $		$ 225,000,000	$ 0	$ 0
Urban Edge Properties [Member]
Real Estate Properties [Line Items]
Number of new shares issued during spin off for every 2 shares of Vornado | shares	1
Urban Edge Properties [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Cash Considerations Transferred During Spin Off (in US Dollars) | $	$ 225,000,000
Partnership Units received during spin off | shares	5,717,184
Equity method ownership percentage	5.40%
Maximum [Member] | Urban Edge Properties [Member]
Real Estate Properties [Line Items]
Duration Of Administrative Services	2 years
Maximum [Member] | Urban Edge Properties [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Duration Of Administrative Services	2 years
Toys R Us [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage		32.50%
Alexanders Inc [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage		32.40%
Retail Segment Strip Shopping Centers [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties			22
Retail Segment Strip Shopping Centers [Member] | Urban Edge Properties [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties	79
Retail Segment Regional Malls [Member] | Urban Edge Properties [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties	3
Vornado Realty Trust [Member]
Real Estate Properties [Line Items]
Number of shares convered during spin off for 1 share of UE | shares	2
Real Estate Fund [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage		25.00%
New York Segment [Member] | Alexanders Inc [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage		32.40%
New York Segment [Member] | New York City Metropolitan Area [Member] | Alexanders Inc [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		7
New York Segment [Member] | New York City Metropolitan Area [Member] | Lexington Avenue 731 [Member]
Real Estate Properties [Line Items]
Square Footage Of Real Estate Property | ft²		1.3
New York Segment [Member] | Manhattan [Member] | Hotel Pennsylvania [Member]
Real Estate Properties [Line Items]
Number of Units in Real Estate Property (in number of residential units) | Rooms		1,700
Warehouse [Member] | Urban Edge Properties [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties	1
Office Building [Member] | San Francisco [Member] | 555 California Street [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		3
Square Footage Of Real Estate Property | ft²		1.8
Contolling Interest In Real Estate Properties Percent		70.00%
Office Building [Member] | New York Segment [Member] | Manhattan [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		35
Square Footage Of Real Estate Property | ft²		21.3
Office Building [Member] | Washington DC Segment [Member] | Washington Dc Northern Virginia [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		57
Square Footage Of Real Estate Property | ft²		15.8
Retail Properties [Member] | New York Segment [Member] | Manhattan [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		65
Square Footage Of Real Estate Property | ft²		2.6
Merchandise Mart Properties [Member] | Merchandise Mart Chicago [Member]
Real Estate Properties [Line Items]
Square Footage Of Real Estate Property | ft²		3.6
Residential Properties [Member] | New York Segment [Member] | Manhattan [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		11
Number of Units in Real Estate Property (in number of residential units) | ResidentialUnits		1,711
Residential Properties [Member] | Washington DC Segment [Member] | Washington Dc Northern Virginia [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		7
Number of Units in Real Estate Property (in number of residential units) | ResidentialUnits		2,414

Basis of Presentation and Sig56

Basis of Presentation and Significant Accounting Policies (Details)	Jan. 15, 2015USD ($)Propertiesshares	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)Properties	Dec. 31, 2013USD ($)
Basis of Presentation and Significant Accounting Policies [Abstract]
Interest Costs Capitalized		$ 59,305,000	$ 62,786,000
Debt Issuance Cost		7,720,000	11,549,000
Reclassification of signage revenue from fee and other income to property rentals			37,929,000	$ 32,866,000
Reclassification of debt issuance costs		79,987,000
Real Estate Properties [Line Items]
Cash Considerations Transferred During Spin Off (in US Dollars)		$ 225,000,000	$ 0	$ 0
Retail Segment Strip Shopping Centers [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties | Properties			22
Urban Edge Properties [Member]
Real Estate Properties [Line Items]
Operating Partnership Units Received From Buyer | shares	5,717,184
Urban Edge Properties [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Cash Considerations Transferred During Spin Off (in US Dollars)	$ 225,000,000
Equity method ownership percentage	5.40%
Urban Edge Properties [Member] | Warehouse [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties | Properties	1
Urban Edge Properties [Member] | Retail Segment Strip Shopping Centers [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties | Properties	79
Urban Edge Properties [Member] | Retail Segment Regional Malls [Member] | Discontinued Operations [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties | Properties	3
Maximum [Member]
Property Plant And Equipment [Line Items]
Real Estate And Accumulated Depreciation Life Used For Depreciation		40 years
Minimum [Member]
Property Plant And Equipment [Line Items]
Real Estate And Accumulated Depreciation Life Used For Depreciation		7 years

Basis of Presentation and Sig57

Basis of Presentation and Significant Accounting Policies (Details 1) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)swaps	Dec. 31, 2014USD ($)swaps	Dec. 31, 2013USD ($)
Basis of Presentation and Significant Accounting Policies [Abstract]
Number of interest rate swaps | swaps		2	1
Schedule Of Equity Method Investments [Line Items]
Non cash impairment losses			$ 85,459	$ 281,098
Significant Policies Other Details [Abstract]
Tenant and other receivables, allowance for doubtful accounts (in US dollars)		$ 11,908	12,210
Receivables Arising From Straight Lining Of Rents Allowance		2,751	3,188
Toys R Us [Member]
Schedule Of Equity Method Investments [Line Items]
Non cash impairment losses	$ (75,196)	$ 0	$ 75,196	$ 240,757

Basis of Presentation and Sig58

Basis of Presentation and Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Tax Treatment Of Dividend [Line Items]
Minimum Percentage of Taxable Income Distributed As Dividends									90.00%
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Line Items]
Deferred Tax Assets	$ 97,104				$ 94,100				$ 97,104	$ 94,100
Net income attributable to common shareholders	230,742	$ 198,870	$ 165,651	$ 84,593	$ 513,238	$ 131,159	$ 76,642	$ 62,349	679,856	783,388	$ 392,034
Tangible Property Regulations									(575,618)	0	0
Sale of real estate and other capital transactions									320,326	(477,061)	(324,936)
Depreciation and Amortization									227,297	219,403	155,401
Straight-line rent adjustments									(144,727)	(77,526)	(64,811)
Stock Options									(8,278)	(9,566)	4,884
Earnings of partially owned entities									(5,299)	71,960	339,376
Impairment losses on marketable equity securities									0	0	37,236
Other, net									(5,833)	1,260	36,186
Estimated Taxable Income (unaudited)									487,724	511,858	575,370
Deferred tax assets allowance, reversed			$ 90,030						90,030	0	0
Income Tax Liability Relating to Taxable REIT Subsidiaries Current									8,322	$ 10,777	$ 9,608
Net Basis Difference Of Assets And Liabilities Between Tax Basis And GAAP Basis	$ 3,400,000								$ 3,400,000
Ordinary Income [Member]
Tax Treatment Of Dividend [Line Items]
Percentage Of Taxable Income Distributed									100.00%

Real Estate Fund Investments (N

Real Estate Fund Investments (Narratives) (Details) ft² in Thousands, $ in Thousands	Mar. 25, 2015USD ($)	Jan. 20, 2015USD ($)LimitedPartners	Aug. 21, 2014USD ($)ft²	Jun. 26, 2014USD ($)	Dec. 31, 2015USD ($)Investments	Dec. 31, 2014USD ($)Investments	Dec. 31, 2013USD ($)	Mar. 25, 2015USD ($)
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)					$ 574,761	$ 513,973
Mortgages payable, net					9,513,713	$ 8,187,843
Unfunded Commitments Of Fund					25,553
Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Equity method ownership percentage		33.00%				11.00%
Real Estate Fund Joint Venture [Member] | Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Equity method ownership percentage		57.00%
Aggregate fair value of Real Estate Fund investments (in US Dollars)		$ 480,000
Mortgages payable, net		$ 310,000
Debt Instrument, Description of Variable Rate Basis		LIBOR
Spread Over LIBOR (in percentage)		2.80%
Debt Instrument Maturity		December 2,018
Length Of Extension Available		1 year
Business Acquisition Cost Of Acquired Entity		$ 95,000
Real Estate Fund [Member]
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)					574,761	$ 513,973
Net realized gain on sale of investment					$ 2,757	$ 76,337	$ 8,184
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	7
Excess of fair value over cost					$ 208,614
Unfunded Commitments Of Fund					$ 102,212
Real Estate Fund [Member] | Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Number Of Limited Partners | LimitedPartners		1
Vornado Realty Trust [Member] | Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Business Acquisition Cost Of Acquired Entity		$ 39,000
Retail Georgetown Park [Member] | Real Estate Fund [Member]
Investment Holdings [Line Items]
Net realized gain on sale of investment			$ 51,124
Square Footage Of Real Estate Property | ft²			305
Proceeds from sale of real estate			$ 272,500
Retail Georgetown Park [Member] | Real Estate Fund [Member] | Joint Venture [Member]
Investment Holdings [Line Items]
Equity method ownership percentage			50.00%
One Park Avenue [Member] | Co Venture [Member]
Investment Holdings [Line Items]
Equity method ownership percentage				45.00%
One Park Avenue [Member] | Vornado Realty Trust Excluding Real Estate Fund [Member]
Investment Holdings [Line Items]
Equity method ownership percentage				55.00%
One Park Avenue [Member] | Real Estate Fund [Member]
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)				$ 560,000
Net realized gain on sale of investment				$ 75,529
One Park Avenue [Member] | Real Estate Fund [Member] | Joint Venture [Member]
Investment Holdings [Line Items]
Sale Of Investments Percentage				64.70%
Santa Monica Office 520 Broadway [Member] | Real Estate Fund [Member]
Investment Holdings [Line Items]
Net realized gain on sale of investment								$ 23,768
Proceeds from sale of real estate	$ 91,650

Real Estate Fund Investments (D

Real Estate Fund Investments (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Details Of Income From Real Estate Funds [Abstract]
Income from real estate fund investments	$ 74,081	$ 163,034	$ 102,898
Less income attributable to noncontrolling interests	(55,765)	(96,561)	(63,952)
Fee And Other Income	164,705	155,206	155,571
Real Estate Fund [Member]
Details Of Income From Real Estate Funds [Abstract]
Net investment income	16,329	12,895	8,943
Net realized gains on exited investments	2,757	76,337	8,184
Net unrealized gains on held investments	54,995	73,802	85,771
Income from real estate fund investments	74,081	163,034	102,898
Less income attributable to noncontrolling interests	(40,117)	(92,728)	(53,427)
Income from real estate fund investments attributable to Vornado	33,964	70,306	49,471
Fee And Other Income	$ 2,939	$ 2,562	$ 2,721

Acquisitions (Narratives) (Deta

Acquisitions (Narratives) (Details) $ in Thousands	Sep. 25, 2015USD ($)ft²	Jul. 31, 2015USD ($)ft²RenewalOptionsshares	Jun. 02, 2015USD ($)ft²	Mar. 18, 2015USD ($)ft²	Jan. 20, 2015USD ($)LimitedPartners	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Business Acquisition [Line Items]
Mortgages payable, net						$ 9,513,713	$ 8,187,843
Lease expiration term						30 years
Operating Partnership Units Value						$ 80,000	$ 0	$ 0
Retail Properties [Member] | 265 West 34th Street [Member]
Business Acquisition [Line Items]
Square Footage Of Real Estate Property | ft²	1,700
Business Acquisition Cost Of Acquired Entity	$ 28,500
Area Of Additional Zoning Air Rights | ft²	15,200
Office Building [Member] | 260 11th Avenue [Member]
Business Acquisition [Line Items]
Square Footage Of Real Estate Property | ft²		235,000
Lease Expiration Date		2,021
Area Of Parking Lot And Additional Air Rights | ft²		10,000
Number Of Market Renewal Options | RenewalOptions		2
Term Of Market Renewal Options		5 years
Lease expiration term		99 years
Purchase Options, Land		$ 110,000
Annual ground rent		$ 3,900
Inflation Rate Agreement For Calculating Annual Ground Rent And Purchase Price Option		Annual ground rent and the purchase option price escalate annually at the lesser of 1.5% or CPI
Operating partnership units issued | shares		813,900
Operating Partnership Units Value		$ 80,000
Center Building [Member] | Office Building [Member]
Business Acquisition [Line Items]
Square Footage Of Real Estate Property | ft²				437,000
Business Acquisition Cost Of Acquired Entity				$ 142,000
Mortgages payable, net				$ 62,000
Interest Rate, End of Period (in percentage)				4.43%
Debt Instrument Maturity				October 2,018
Crowne Plaza Time Square Hotel [Member]
Business Acquisition [Line Items]
Equity method ownership percentage					33.00%		11.00%
Crowne Plaza Time Square Hotel [Member] | Real Estate Fund [Member]
Business Acquisition [Line Items]
Number Of Limited Partners | LimitedPartners					1
Crowne Plaza Time Square Hotel [Member] | Real Estate Fund Joint Venture [Member]
Business Acquisition [Line Items]
Equity method ownership percentage					57.00%
Business Acquisition Cost Of Acquired Entity					$ 95,000
Mortgages payable, net					$ 310,000
Debt Instrument Maturity					December 2,018
150 West 34th Street [Member] | Retail Properties [Member]
Business Acquisition [Line Items]
Square Footage Of Real Estate Property | ft²			78,000
Business Acquisition Cost Of Acquired Entity			$ 355,000
Mortgages payable, net			$ 205,000
Lease Expiration Date			May 2,019
Area Of Additional Zoning Air Rights | ft²			226,000

Marketable Securities and Der62

Marketable Securities and Derivative Instruments (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Proceeds from sales of, and return of investment in, marketable securities	$ 0	$ 0	$ 378,709
Other Investments [Member]
Derivative [Line Items]
Marketable Securities Gain			31,741
Proceeds from sales of, and return of investment in, marketable securities			$ 44,209

Marketable Securities and Der63

Marketable Securities and Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	$ 150,997	$ 206,323
Available-for-sale Equity Securities, Amortized Cost Basis	72,549	72,549
Available-for-sale Securities, Gross Unrealized Gain	78,448	133,774
Lexington Realty Trust [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	147,752	202,789
Available-for-sale Equity Securities, Amortized Cost Basis	72,549	72,549
Available-for-sale Securities, Gross Unrealized Gain	75,203	130,240
Other Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	3,245	3,534
Available-for-sale Equity Securities, Amortized Cost Basis	0	0
Available-for-sale Securities, Gross Unrealized Gain	$ 3,245	$ 3,534

Investments in Partially Owne64

Investments in Partially Owned Entities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Nov. 01, 2014	Dec. 31, 2013	Nov. 02, 2013	Mar. 31, 2015	Sep. 30, 2014
Equity Method Investments And Income From Equity Method Investments [Abstract]
Non cash impairment losses			$ (85,459)		$ (281,098)
Carrying amount of investments in partially owned entities		$ 1,550,422	1,240,489		1,159,803
Our share of Net (Loss) Income		(12,630)	(59,861)		(340,882)
Non-cash impairment losses		0	0		72,974
Impairment Losses		256	26,518		37,170
Condensed Financial Information For Equity Method Investments [Abstract]
Assets		25,526,000	21,389,000
Liabilities		21,162,000	17,986,000
Noncontrolling interests		146,000	104,000
Equity		4,218,000	3,299,000
Total revenue		13,423,000	13,620,000		14,092,000
Net (loss) income attributable to investee		$ (224,000)	(434,000)		(368,000)
Toys R Us [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage		32.50%
Equity in net income (loss)		$ 0	(4,691)		(128,919)
Non cash impairment losses	$ 75,196	0	(75,196)		(240,757)
Management fees		2,500	6,331		7,299
Carrying amount of investments in partially owned entities		0	0					$ 0
Our share of Net (Loss) Income	$ 75,196	$ 2,500	(73,556)		(362,377)
Condensed Financial Information For Equity Method Investments [Abstract]
Assets				$ 11,267,000
Liabilities				10,377,000
Noncontrolling interests				82,000
Equity				808,000
Total revenue				12,645,000		$ 13,046,000
Net (loss) income attributable to investee				$ (343,000)		$ (396,000)
Alexanders Inc [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage		32.40%
Equity in net income (loss)		$ 24,209	21,287		17,721
Management, leasing and development fees		6,869	8,722		6,681
Carrying amount of investments in partially owned entities		133,568	131,616
Excess of investee's carrying amount over equity in net assets		40,340
Our share of Net (Loss) Income		31,078	30,009		24,402
India real estate ventures [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Non cash impairment losses		14,806	5,771
Carrying amount of investments in partially owned entities		48,310	76,752
Our share of Net (Loss) Income		$ (18,746)	(8,309)		(3,533)
India real estate ventures [Member] | Minimum [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage		4.10%
India real estate ventures [Member] | Maximum [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage		36.50%
India real estate ventures [Member] | Tcg Urban Infrastructure Holdings [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage		25.00%
Partially owned office buildings [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities		$ 909,782	760,749
Our share of Net (Loss) Income		(23,556)	93		(4,212)
Partially owned office buildings [Member] | Joint Venture [Member]
Condensed Financial Information For Equity Method Investments [Abstract]
Equity		0
Partially owned office buildings [Member] | 666 Fifth Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Our share of Net (Loss) Income		(39,600)
Partially owned office buildings [Member] | 650 Madison Avenue [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Write off of below market lease liability		$ 12,800
Partially owned office buildings [Member] | West 57th Street [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Our share of accelerated depreciation			14,500
Urban Edge Properties [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage		5.40%
Equity in net income (loss)		$ 2,430	0		0
Management fees		1,964	0		0
Carrying amount of investments in partially owned entities		25,351	0
Our share of Net (Loss) Income		$ 4,394	0		0
PREIT Associates [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage		8.10%					8.10%
Carrying amount of investments in partially owned entities		$ 133,375	0
Excess of investee's carrying amount over equity in net assets		65,404
Our share of Net (Loss) Income		(7,450)	0		0
LNR [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Our share of Net (Loss) Income		0	0		18,731
Non-cash impairment losses					27,231
Condensed Financial Information For Equity Method Investments [Abstract]
Net (loss) income attributable to investee					18,731
LNR [Member] | Net gain on sale [Member]
Condensed Financial Information For Equity Method Investments [Abstract]
Net (loss) income attributable to investee					3,776
LNR [Member] | Equity In Net Income After Income Taxes [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Our share of Net (Loss) Income					42,186
Lexington Realty Trust [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Our share of Net (Loss) Income		0	0		(979)
Other equity method investments [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities		300,036	271,372
Our share of Net (Loss) Income		(850)	(8,098)		(12,914)
Other equity method investments [Member] | Suffolk Downs [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Non-cash impairment losses			10,263
Impairment Losses			5,959
Asset Impairment Loan Loss Reserve			4,304
All Equity Method Investees Excluding Toys [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Our share of Net (Loss) Income		$ (12,630)	$ (59,861)		$ (340,882)

Investments in Partially Owne65

Investments in Partially Owned Entities (Alexander's Inc.) (Details)	Jan. 15, 2015USD ($)Properties	Dec. 22, 2014USD ($)	Dec. 31, 2015USD ($)$ / shares$ / ft²shares	Dec. 31, 2014USD ($)Properties	Dec. 31, 2013USD ($)
Managment And Development Agreement [Abstract]
Cash Considerations Transferred During Spin Off			$ 225,000,000	$ 0	$ 0
Urban Edge Properties [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Closing share price (in dollars per share) | $ / shares			$ 23.45
Equity Method Investment Market Value			$ 134,068,000
Excess of investee's fair value over carrying amount			$ 108,717,000
Urban Edge Properties [Member] | Discontinued Operations [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	5.40%
Managment And Development Agreement [Abstract]
Cash Considerations Transferred During Spin Off	$ 225,000,000
Retail Segment Strip Shopping Centers [Member] | Discontinued Operations [Member]
Managment And Development Agreement [Abstract]
Number Of Real Estate Properties | Properties				22
Retail Segment Strip Shopping Centers [Member] | Urban Edge Properties [Member] | Discontinued Operations [Member]
Managment And Development Agreement [Abstract]
Number Of Real Estate Properties | Properties	79
Retail Segment Regional Malls [Member] | Urban Edge Properties [Member] | Discontinued Operations [Member]
Managment And Development Agreement [Abstract]
Number Of Real Estate Properties | Properties	3
Warehouse [Member] | Urban Edge Properties [Member] | Discontinued Operations [Member]
Managment And Development Agreement [Abstract]
Number Of Real Estate Properties | Properties	1
Alexanders Inc [Member]
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			$ 384.11
Equity Method Investment Market Value			$ 635,345,000
Excess of investee's fair value over carrying amount			501,777,000
Excess of investee's carrying amount over equity in net assets			$ 40,340,000
Managment And Development Agreement [Abstract]
Property Management Fee Description			We receive an annual fee for managing Alexander’s and all of its properties equal to the sum of (i) $2,800,000, (ii) 2% of the gross revenue from the Rego Park II Shopping Center, (iii) $0.50 per square foot of the tenant-occupied office and retail space at 731 Lexington Avenue, and (iv) $289,000, escalating at 3% per annum, for managing the common area of 731 Lexington Avenue.
Management and Development fee income			$ 2,800,000
Development Fee Percent			6.00%
Leasing Agreement [Abstract]
Leasing Services Fee Description			leasing services for a fee of 3% of rent for the first ten years of a lease term, 2% of rent for the eleventh through twentieth year of a lease term and 1% of rent for the twenty-first through thirtieth year of a lease term, subject to the payment of rents by Alexander’s tenants. In the event third-party real estate brokers are used, our fee increases by 1% and we are responsible for the fees to the third-parties.
Lease Fee Percentage Of Rent One To Ten Years			3.00%
Lease Fee Percentage Of Rent Eleven To Twenty Years			2.00%
Lease Fee Percentage Of Rent Twenty First To Thirty Years			1.00%
Percentage Increase Lease Fee If Broker Used			1.00%
Asset Sale Commission Threshold			$ 50,000,000
Percentage Commissions On Sale Of Assets Under Fifty Million			3.00%
Percentage Commissions On Sale Of Assets Over Fifty Million			1.00%
Leasing Services Fee And Commission On Asset Sales Annual Installment Eliminated		$ 4,000,000
Repayment of Alexander's Inc. leasing commissions		$ 40,353,000
Other Agreements [Abstract]
Fee Income recognized by equity method investees for building maintenance services			$ 2,221,000	$ 2,318,000	$ 2,036,000
Other Financial Data For Equity Method Investments [Abstract]
Commission On Asset Sales Description			commission upon the sale of any of Alexander’s assets equal to 3% of gross proceeds, as defined, for asset sales less than $50,000,000, and 1% of gross proceeds, as defined, for asset sales of $50,000,000 or more.
Alexanders Inc [Member] | Rego Park 2 Property [Member]
Managment And Development Agreement [Abstract]
Property Management Fee Agreement Percentage Of Income			2.00%
Alexanders Inc [Member] | Lexington Avenue 731 [Member]
Managment And Development Agreement [Abstract]
Property Management Fee Agreement Price Per Square Foot | $ / ft²			0.50
Alexanders Inc [Member] | Common Area 731 Lexington Avenue [Member]
Managment And Development Agreement [Abstract]
Management and Development fee income			$ 289,000
Property Management Fee Agreement Escalation Percentage Of Income			3.00%

Investments in Partially Owne66

Investments in Partially Owned Entities (Urban Edge Properties and PREIT Associates L.P.) (Details) $ / shares in Units, ft² in Thousands	Mar. 31, 2015USD ($)ft²$ / sharesshares	Jan. 15, 2015shares	Mar. 02, 2014USD ($)ft²$ / sharesshares	Dec. 31, 2015USD ($)$ / shares	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Schedule Of Equity Method Investments [Line Items]
Operating Partnership Units Value				$ 80,000,000	$ 0	$ 0
Pennsylvania Real Estate Investment Trust [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	8.10%			8.10%
Closing share price (in dollars per share) | $ / shares				$ 21.87
Equity Method Investment fair Value				$ 136,688,000
Excess of investee's fair value over carrying amount				3,313,000
Excess of investee's carrying amount over equity in net assets				$ 65,404,000
Springfield Mall [Member] | Pennsylvania Real Estate Investment Trust [Member] | Discontinued Operations, Disposed of by Sale [Member]
Schedule Of Equity Method Investments [Line Items]
Operating Partnership Units Received From Buyer | shares	6,250,000		6,250,000
Square Footage Of Real Estate Property | ft²	1,350		1,350
Gross proceeds from sale of real estate	$ 485,313,000		$ 485,313,000
Cash Proceeds from sale of real estate	340,000,000		340,000,000
Operating Partnership Units Value	$ 145,313,000		$ 145,313,000
Operating Partnership Unis Value Per Unit | $ / shares	$ 23.25		$ 23.25
Payments for tenant improvements and allowances	$ 19,000,000
Urban Edge Properties [Member]
Schedule Of Equity Method Investments [Line Items]
Operating Partnership Units Received From Buyer | shares		5,717,184
Closing share price (in dollars per share) | $ / shares				$ 23.45
Equity Method Investment fair Value				$ 134,068,000
Excess of investee's fair value over carrying amount				$ 108,717,000
Urban Edge Properties [Member] | Discontinued Operations, Disposed of by Sale [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage		5.40%
Urban Edge Properties [Member] | Maximum [Member]
Schedule Of Equity Method Investments [Line Items]
Duration Of Administrative Services		2 years
Urban Edge Properties [Member] | Maximum [Member] | Discontinued Operations, Disposed of by Sale [Member]
Schedule Of Equity Method Investments [Line Items]
Duration Of Administrative Services		2 years

Investments in Partially Owne67

Investments in Partially Owned Entities (512 West 22nd Street) (Details) ft² in Thousands, $ in Thousands	Nov. 24, 2015USD ($)Extensions	Jun. 24, 2015USD ($)ft²	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable			$ 9,513,713	$ 8,187,843
512 West 22nd Street [Member]
Schedule Of Equity Method Investments [Line Items]
Debt Instrument Maturity	November 2,019
Number Of Extensions Available | Extensions	2
Length Of Extension Available	6 months
Debt Instrument, Description of Variable Rate Basis	LIBOR
Spread Over LIBOR (in percentage)	2.65%
Interest Rate, End of Period (in percentage)			3.07%
512 West 22nd Street [Member] | Office Building [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage		55.00%
Square Footage Of Real Estate Property | ft²		173
Estimated Development Cost		$ 235,000
Project Start Date		Fourth Quarter of 2015
Estimated Project Completion Date		2,018
512 West 22nd Street [Member] | Vornado Realty Trust [Member]
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable			$ 24,240
512 West 22nd Street [Member] | Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable	$ 126,000		$ 44,072

Investments in Partially Owne68

Investments in Partially Owned Entities - Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Pro Rata Share Debt Of Partially Owned Entities	$ 4,432,078		$ 4,190,428
Toys R Us [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	32.50%
Maturity, Range, Start	2,016
Maturity, Range, End	2,021
Interest Rate, End of Period (in percentage)	7.35%
Equity Method Investment Debt Of Partially Owned Entities	$ 5,619,710		5,748,350
Partially owned office buildings [Member]
Schedule Of Equity Method Investments [Line Items]
Maturity, Range, Start	2,016
Maturity, Range, End	2,023
Interest Rate, End of Period (in percentage)	5.57%
Equity Method Investment Debt Of Partially Owned Entities	$ 3,771,255		3,691,274
PREIT Associates [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	8.10%	8.10%
Maturity, Range, Start	2,016
Maturity, Range, End	2,025
Interest Rate, End of Period (in percentage)	4.04%
Equity Method Investment Debt Of Partially Owned Entities	$ 1,852,270		0
Urban Edge Properties [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	5.40%
Maturity, Range, Start	2,018
Maturity, Range, End	2,034
Interest Rate, End of Period (in percentage)	4.15%
Equity Method Investment Debt Of Partially Owned Entities	$ 1,246,155		0
Alexanders Inc [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	32.40%
Maturity, Range, Start	2,016
Maturity, Range, End	2,022
Interest Rate, End of Period (in percentage)	1.69%
Equity Method Investment Debt Of Partially Owned Entities	$ 1,053,262		1,032,780
India real estate ventures [Member] | Tcg Urban Infrastructure Holdings [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	25.00%
Maturity, Range, Start	2,016
Maturity, Range, End	2,026
Interest Rate, End of Period (in percentage)	12.06%
Equity Method Investment Debt Of Partially Owned Entities	$ 185,607		183,541
Other equity method investments [Member]
Schedule Of Equity Method Investments [Line Items]
Maturity, Range, Start	2,016
Maturity, Range, End	2,023
Interest Rate, End of Period (in percentage)	4.27%
Equity Method Investment Debt Of Partially Owned Entities	$ 1,316,641		$ 1,314,077

Dispositions (Narratives) (Deta

Dispositions (Narratives) (Details) $ / shares in Units, ft² in Thousands	Mar. 31, 2018USD ($)	Dec. 22, 2015USD ($)ft²	Sep. 09, 2015USD ($)ft²	Aug. 06, 2015USD ($)	Mar. 31, 2015USD ($)ft²$ / sharesshares	Mar. 13, 2015USD ($)	Jan. 15, 2015USD ($)Propertiesshares	Dec. 18, 2014USD ($)ft²	Jul. 08, 2014USD ($)ft²	Mar. 02, 2014USD ($)ft²$ / sharesshares	Feb. 24, 2014USD ($)	Dec. 17, 2013USD ($)ft²	Sep. 23, 2013USD ($)	Apr. 15, 2013USD ($)	Jan. 24, 2013USD ($)	Mar. 31, 2015USD ($)ft²$ / shares	Mar. 31, 2014USD ($)	Dec. 31, 2015USD ($)Properties	Dec. 31, 2014USD ($)Properties	Dec. 31, 2013USD ($)Properties
Dispositions [Abstract]
Income from discontinued operations																		$ 52,262,000	$ 585,676,000	$ 568,095,000
Net gains on sale of real estate																		65,396,000	507,192,000	414,502,000
Cash Considerations Transferred During Spin Off (in US Dollars)																		225,000,000	0	0
Gain on sale of interest in leases																		0	0	1,377,000
Operating Partnership Units Value																		80,000,000	0	0
Impairment Losses																		$ 256,000	26,518,000	37,170,000
Pennsylvania Real Estate Investment Trust [Member]
Dispositions [Abstract]
Equity method ownership percentage					8.10%											8.10%		8.10%
Strip Shopping Centers [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Net gains on sale of real estate																			$ 22,500,000
Number Of Real Estate Properties | Properties																			22
Number Of Real Estate Properties Sold | Properties																			6
Cash Proceeds from sale of real estate																			$ 66,410,000
Springfield Mall [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Net gains on sale of real estate					$ 7,823,000											$ 7,192,000
Deferred Gain on Sale of Property					$ 631,000											$ 631,000
Impairment Losses																	$ 20,000,000
Springfield Mall [Member] | Pennsylvania Real Estate Investment Trust [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Square Footage Of Real Estate Property | ft²					1,350					1,350						1,350
Gross proceeds from the sale of real estate					$ 485,313,000					$ 485,313,000
Cash Proceeds from sale of real estate					$ 340,000,000					$ 340,000,000
Operating Partnership Units Received From Buyer | shares					6,250,000					6,250,000
Operating Partnership Units Value					$ 145,313,000					$ 145,313,000						$ 145,313,000
Operating Partnership Unis Value Per Unit | $ / shares					$ 23.25					$ 23.25						$ 23.25
Impairment Losses																	$ 20,000,000
Springfield Mall [Member] | Scenario Forecast [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Additional Consideration Receivable Percent	50.00%
Additional Consideration Theshold, Value	$ 465,000,000
Capitalization rate	5.50%
Geary Street, CA [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Proceeds from Sale of interest in leases						$ 34,189,000
Gain on sale of interest in leases						$ 21,376,000
Monmouth Mall [Member] | Regional Malls [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Gross proceeds from the sale of real estate				$ 38,000,000
Net gains on sale of real estate				33,153,000
Market value of the property sold				$ 229,000,000
Sale Of Ownership Interest Percent				50.00%
Residual Retail Properties [Member]
Dispositions [Abstract]
Net gains on sale of real estate																		$ 3,675,000
Number Of Real Estate Properties Sold | Properties																		5
Cash Proceeds from sale of real estate																		$ 10,731,000
Urban Edge Properties [Member]
Dispositions [Abstract]
Operating Partnership Units Received From Buyer | shares							5,717,184
Urban Edge Properties [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Cash Considerations Transferred During Spin Off (in US Dollars)							$ 225,000,000
Equity method ownership percentage							5.40%
Urban Edge Properties [Member] | Warehouse [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Number Of Real Estate Properties | Properties							1
Urban Edge Properties [Member] | Strip Shopping Centers [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Number Of Real Estate Properties | Properties							79
Urban Edge Properties [Member] | Regional Malls [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Number Of Real Estate Properties | Properties							3
Retail Properties Segment [Member] | Strip Shopping Centers [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Net gains on sale of real estate																				$ 7,851,000
Number Of Real Estate Properties Sold | Properties																				12
Cash Proceeds from sale of real estate																				$ 82,300,000
Retail Properties Segment [Member] | Retail NY Hicksville (Broadway Mall) [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Gross proceeds from the sale of real estate											$ 94,000,000
Net proceeds from the sale of real estate											$ 92,174,000
Retail Properties Segment [Member] | Retail CA Los Angeles Beverly Connection [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Square Footage Of Real Estate Property | ft²									335
Gross proceeds from the sale of real estate									$ 260,000,000
Net gains on sale of real estate									44,155,000
Cash Proceeds from sale of real estate									239,000,000
Mortgage loan receivable									$ 21,000,000
Mortgage loan receivable maturity tenure									10 years
Retail Properties Segment [Member] | Green Acres Mall [Member] | Regional Malls [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Gross proceeds from the sale of real estate															$ 500,000,000
Net gains on sale of real estate															202,275,000
Net proceeds from the sale of real estate															$ 185,000,000
Retail Properties Segment [Member] | Plant [Member] | Strip Shopping Centers [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Gross proceeds from the sale of real estate														$ 203,000,000
Net gains on sale of real estate														32,169,000
Net proceeds from the sale of real estate														98,000,000
Retail Properties Segment [Member] | Gallery At Market Street [Member] | Strip Shopping Centers [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Gross proceeds from the sale of real estate														60,000,000
Net gains on sale of real estate														33,058,000
Net proceeds from the sale of real estate														$ 58,000,000
Retail Properties Segment [Member] | Tampa Florida [Member] | Strip Shopping Centers [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Gross proceeds from the sale of real estate													$ 45,000,000
Retail Properties Segment [Member] | Tampa Florida [Member] | Strip Shopping Centers [Member] | Vornado Realty Trust [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Gross proceeds from the sale of real estate													33,750,000
Net gains on sale of real estate													8,728,000
Net proceeds from the sale of real estate													$ 20,810,000
Sale Of Ownership Interest Percent													75.00%
Washington DC Segment [Member] | 1750 Pennsylvania Avenue [Member] | Office Building [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Square Footage Of Real Estate Property | ft²			278
Gross proceeds from the sale of real estate			$ 182,000,000
Net gains on sale of real estate			102,000,000
Deferred Tax Gain On Sale Of Real Estate			$ 137,000,000
Other Segment [Member]
Dispositions [Abstract]
Income from discontinued operations																		$ 52,262,000	$ 122,513,000	$ 407,781,000
New York Segment [Member] | 20 Broad Street [Member] | Office Building [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Square Footage Of Real Estate Property | ft²		473
Gross proceeds from the sale of real estate		$ 200,000,000
Income from discontinued operations		157,000,000
Net gains on sale of real estate		142,000,000
Lease termination income		$ 15,000,000
New York Segment [Member] | 1740 Broadway [Member] | Office Building [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Square Footage Of Real Estate Property | ft²								601
Gross proceeds from the sale of real estate								$ 605,000,000
Net gains on sale of real estate								441,000,000
Net proceeds from the sale of real estate								580,000,000
Income tax on gain on sale								$ 484,000,000
New York Segment [Member] | 866 UN Plaza [Member] | Discontinued Operations [Member]
Dispositions [Abstract]
Square Footage Of Real Estate Property | ft²												360
Gross proceeds from the sale of real estate												$ 200,000,000
Net gains on sale of real estate												127,512,000
Net proceeds from the sale of real estate												$ 146,439,000

Dispositions (Details 1)

Dispositions (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Dispositions [Abstract]
Real Estate, Net	$ 29,561	$ 2,028,677
Other Assets	7,459	205,451
Assets related to discontinued operations	37,020	2,234,128
Mortgages Payable, net	0	1,278,182
Other Liabilities (primarily deferred revenue in 2014)	12,470	222,827
Liabilities related to discontinued operations	12,470	1,501,009
Income from discontinued operations:
Total revenues	27,831	395,786	$ 502,061
Total expenses	17,651	274,107	310,364
Income from discontinued operations before gain on sale of real estate	10,180	121,679	191,697
Net gains on sale of real estate	65,396	507,192	414,502
Transaction related costs (primarily UE Spin off)	(22,972)	(14,956)	0
Impairment losses	(256)	(26,518)	(37,170)
Net gain on sale of asset other than real estate	0	0	1,377
Pretax income from discontinued operations	52,348	587,397	570,406
Income tax expense	(86)	(1,721)	(2,311)
Income from Discontinued Operations	52,262	585,676	568,095
Cash flows related to discontinued Operations:
Cash flows from operating activities, discontinued operations	(33,462)	123,837	279,436
Cash flows from investing activities, discontinued operations	$ 346,865	$ (180,019)	$ (117,497)

Identified Intangible Assets 71

Identified Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross amount	$ 415,261	$ 424,976
Accumulated amortization	(187,360)	(199,821)
Net	227,901	225,155
Gross amount	643,488	657,976
Accumulated amortization	(325,340)	(329,775)
Net	318,148	328,201
Below Market Leases Net Of Above Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	78,749	37,516	$ 41,970
2,016	52,359
2,017	44,501
2,018	43,028
2,019	31,011
2,020	23,320
Other Identified Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	36,659	28,275	61,915
2,016	29,349
2,017	24,427
2,018	20,063
2,019	15,779
2,020	12,345
Tenant Under Ground Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	1,832	$ 1,832	$ 2,745
2,016	1,832
2,017	1,832
2,018	1,832
2,019	1,832
2,020	$ 1,832

Debt (Narratives) (Details)

Debt (Narratives) (Details) ft² in Thousands

Dec. 21, 2015USD ($)Extensions

Dec. 11, 2015USD ($)ft²

Oct. 30, 2015USD ($)Extensions

Sep. 22, 2015USD ($)

Jul. 28, 2015USD ($)ft²

Jun. 02, 2015USD ($)Extensions

Apr. 30, 2015USD ($)PropertiesResidentialUnits

Jan. 31, 2015USD ($)

Mar. 31, 2015USD ($)

Dec. 31, 2015USD ($)

Dec. 31, 2014USD ($)

Dec. 31, 2013USD ($)

Debt Instrument [Line Items]

Net proceeds from borrowings

$ 4,468,872,000

$ 2,428,285,000

$ 2,262,245,000

Mortgages payable, net

9,513,713,000

8,187,843,000

Revolving credit facilities

$ 550,000,000

$ 0

770 Broadway [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

5.65%

Debt Instrument Maturity

March 2,016

Mortgages payable, net

$ 353,000,000

Secured Debt [Member] | 220 Central Park South [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

2.42%

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

2.00%

Debt Instrument Maturity

2,020

Mortgages payable, net

$ 950,000,000

Increase in loan amount

350,000,000

Mezzanine loan financing (in US Dollars)

500,000,000

Mezzanine loan contract termination fee

$ 15,000,000

Secured Debt [Member] | St. Regis Hotel [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

2.19%

Debt Instrument Maturity

December 2,020

Mortgages payable, net

$ 450,000,000

Number Of Extensions Available | Extensions

2

Length Of Extension Available

1 year

Secured Debt [Member] | St. Regis Hotel [Member] | Joint Venture [Member]

Debt Instrument [Line Items]

Equity method ownership percentage

74.30%

Secured Debt [Member] | St. Regis Hotel [Member] | First Three Years [Member]

Debt Instrument [Line Items]

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.80%

Secured Debt [Member] | St. Regis Hotel [Member] | Year Four And Five [Member]

Debt Instrument [Line Items]

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.90%

Secured Debt [Member] | St. Regis Hotel [Member] | Remaining Extension Periods [Member]

Debt Instrument [Line Items]

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

2.00%

Secured Debt [Member] | 888 Seventh Avenue [Member] | Office [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

1.92%

Notes And Loans Payable Refinanced Amount (in US Dollars)

$ 375,000,000

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.60%

Debt Instrument Maturity

December 2,020

Net proceeds from borrowings

$ 49,000,000

Square Footage Of Real Estate Property | ft²

882

Debt Term

5 years

Secured Debt [Member] | 888 Seventh Avenue [Member] | Office [Member] | Fixed Rate [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

3.15%

Secured Debt [Member] | 100 West 33rd Street [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

1.92%

Notes And Loans Payable Refinanced Amount (in US Dollars)

$ 580,000,000

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.65%

Debt Instrument Maturity

July 2,020

Net proceeds from borrowings

$ 242,000,000

Square Footage Of Real Estate Property | ft²

1,100

Secured Debt [Member] | 100 West 33rd Street [Member] | Office [Member]

Debt Instrument [Line Items]

Square Footage Of Real Estate Property | ft²

855

Secured Debt [Member] | 100 West 33rd Street [Member] | Manhattan Mall [Member]

Debt Instrument [Line Items]

Square Footage Of Real Estate Property | ft²

256

Secured Debt [Member] | RiverHouse Apartments [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

1.52%

Notes And Loans Payable Refinanced Amount (in US Dollars)

$ 308,000,000

Number Of Apartment Buildings | Properties

3

Number Of Units | ResidentialUnits

1,670

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.28%

Debt Instrument Maturity

2,025

Net proceeds from borrowings

$ 43,000,000

Secured Debt [Member] | RiverHouse Apartments [Member] | Mortgages Maturing April 2015 [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

5.43%

Debt Instrument Maturity

April 2,015

Mortgages payable, net

$ 195,000,000

Secured Debt [Member] | RiverHouse Apartments [Member] | Mortgages Maturing 2018 [Member]

Debt Instrument [Line Items]

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.53%

Debt Instrument Maturity

2,018

Mortgages payable, net

$ 64,000,000

Secured Debt [Member] | 150 West 34th Street [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

2.52%

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

2.25%

Debt Instrument Maturity

2,018

Mortgages payable, net

$ 205,000,000

Number Of Extensions Available | Extensions

2

Length Of Extension Available

1 year

Senior Unsecured Notes [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

3.68%

Unsecured Term Loan [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

1.40%

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.15%

Debt Instrument Maturity

October 2,018

Number Of Extensions Available | Extensions

2

Length Of Extension Available

1 year

Usecured term loan, maximum borrowing capacity

$ 750,000,000

Facility Fee (in percentage)

0.20%

Revolving credit facilities

$ 187,500,000

Unsecured term loan, description

The facility provides that the maximum amount available is twice the amount outstanding on April 29, 2016, limited to $750,000,000, and all draws must be made by October 2017.

Unsecured Debt Final Withdrawal Date

October 2,017

Senior Unsecured Notes 4.25% [Member]

Debt Instrument [Line Items]

Redemption of senior unsecured notes

$ 500,000,000

Interest Rate, End of Period (in percentage)

4.25%

Redemption Price, Percentage of Principal Amount Redeemed

100.00%

Debt Instrument Maturity

April 1, 2015

Debt (Summary of Debt) (Details

Debt (Summary of Debt) (Details) - USD ($)	Dec. 31, 2015	Oct. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Deferred financing costs, net and other	$ (7,720,000)		$ (11,549,000)
Total, net	9,513,713,000		8,187,843,000
Unsecured debt, net	844,159,000		1,342,494,000
Unsecured term loan, net	183,138,000		0
Revolving credit facilities	550,000,000		0
Unsecured Debt And Revolving Credit Facility	1,577,297,000		1,342,494,000
Debt Fiscal Year Maturity [Abstract]
Collateral Property Net Carrying Value	9,600,000,000
Mortgages Payable [Member]
Debt Instrument [Line Items]
Mortgages payable, gross	9,614,838,000		8,261,055,000
Deferred financing costs, net and other	$ (101,125,000)		(73,212,000)
Interest Rate, End of Period (in percentage)	3.56%
Debt Fiscal Year Maturity [Abstract]
2,016	$ 1,095,366,000
2,017	411,113,000
2,018	441,354,000
2,019	379,122,000
2,020	2,835,451,000
Thereafter	4,452,432,000
Mortgages Payable [Member] | Fixed Rate [Member]
Debt Instrument [Line Items]
Mortgages payable, gross	$ 6,356,634,000		6,497,286,000
Interest Rate, End of Period (in percentage)	4.29%
Mortgages Payable [Member] | Variable Rate [Member]
Debt Instrument [Line Items]
Mortgages payable, gross	$ 3,258,204,000		1,763,769,000
Interest Rate, End of Period (in percentage)	2.14%
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Deferred financing costs, net and other	$ (5,841,000)		(7,506,000)
Unsecured debt, gross	$ 850,000,000		1,350,000,000
Interest Rate, End of Period (in percentage)	3.68%
Term Loan [Member]
Debt Instrument [Line Items]
Deferred financing costs, net and other	$ (4,362,000)		0
Unsecured debt, gross	$ 187,500,000		0
Revolving credit facilities		$ 187,500,000
Interest Rate, End of Period (in percentage)	1.40%
Unsecured Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
Revolving credit facilities	$ 550,000,000		$ 0
Interest Rate, End of Period (in percentage)	1.38%
Senior Unsecured Debt And Unsecured Revolving Credit Facilities [Member]
Debt Fiscal Year Maturity [Abstract]
2,016	$ 550,000,000
2,017	0
2,018	0
2,019	450,000,000
2,020	187,500,000
Thereafter	$ 400,000,000

Redeemable Noncontrolling Int74

Redeemable Noncontrolling Interests (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	$ 1,223,793	$ 1,336,780
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	5,428	1,000
Redeemable Noncontrolling Interests Rollforward [Abstract]
Reedemable Noncontrolling Interest, Beginning Balance	1,337,780	1,003,620
Net income	43,231	47,613	$ 24,817
Other comprehensive income	(2,866)	1,323	5,296
Distributions	(30,263)	(33,469)
Other, net	37,605	30,690
Reedemable Noncontrolling Interest, Ending Balance	1,229,221	1,337,780	$ 1,003,620
Common Class A [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	$ 1,223,793	$ 1,336,780
Outstanding Partnership Units held by Third Parties	12,242,820	11,356,550
Preferred Or Annual Distribution Rate (in dollars per share)	$ 2.52
Redeemable Noncontrolling Interests Rollforward [Abstract]
Redemption of Class A units for common shares, at redemption value	$ (48,230)	$ (27,273)
Adjustments to carry redeemable Class A units at redemption value	(192,464)	315,276
Issuance of Units	80,000
Series D16 Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	$ 1,000	$ 1,000
Outstanding Partnership Units held by Third Parties	1	1
Par or Stated Value Per Share	$ 1,000,000
Preferred Or Annual Distribution Rate (in dollars per share)	$ 50,000
Dividend Percentage	5.00%
Series D17 Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	$ 4,428	$ 0
Outstanding Partnership Units held by Third Parties	177,100	0
Par or Stated Value Per Share	$ 25
Preferred Or Annual Distribution Rate (in dollars per share)	$ 0.8125
Dividend Percentage	3.25%
Redeemable Noncontrolling Interests Rollforward [Abstract]
Issuance of Units	$ 4,428
Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Outstanding Partnership Units held by Third Parties	177,101	1
Redeemable Noncontrolling Interests Additional Disclosure [Abstract]
Fair value of Series G convertible preferred units and Series D-13 cumulative redeemable preferred units	$ 50,561	$ 55,097

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Common Stock Number Of Shares Par Value And Other Disclosures [Abstract]
Common shares of beneficial interest: outstanding shares	188,576,853				188,576,853	187,887,498
Dividends paid on common shares					$ 474,751	$ 547,831	$ 545,913
Dividends per common share	$ 0.63	$ 0.63	$ 0.63	$ 0.63
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred shares of beneficial interest: issued shares	52,676,629				52,676,629	52,678,939
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Preferred Stock, Value	$ 1,276,954				$ 1,276,954	$ 1,277,026
Preferred shares of beneficial interest: outstanding shares	52,676,629				52,676,629	52,678,939
Preferred shares of beneficial interest: authorized shares	110,000,000				110,000,000	110,000,000
Series A Preferred Stock [Member] | Convertible Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage					6.50%
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Preferred Stock, Value	$ 1,321				$ 1,321	$ 1,393
Preferred shares of beneficial interest: outstanding shares	26,629				26,629	28,939
Preferred Stock Liquidation Preference (in dollars per share)	$ 50				$ 50
Preferred Stock, Dividend Rate, Per-Dollar-Amount					$ 3.25
Preferred shares of beneficial interest: authorized shares	83,977				83,977	83,977
Conversion Rate of Preferred Stock to Common Stock, Shares	1.5934				1.5934	1.4334
Series G Preferred Stock [Member] | Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage					6.625%
Preferred Stock Redemption Price Per Share	$ 25				$ 25
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Preferred Stock, Value	$ 193,135				$ 193,135	$ 193,135
Preferred shares of beneficial interest: outstanding shares	8,000,000				8,000,000	8,000,000
Preferred Stock Liquidation Preference (in dollars per share)	$ 25				$ 25
Preferred Stock, Dividend Rate, Per-Dollar-Amount					$ 1.65625
Preferred shares of beneficial interest: authorized shares	8,000,000				8,000,000	8,000,000
Series I Preferred Stock [Member] | Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage					6.625%
Preferred Stock Redemption Price Per Share	$ 25				$ 25
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Preferred Stock, Value	$ 262,379				$ 262,379	$ 262,379
Preferred shares of beneficial interest: outstanding shares	10,800,000				10,800,000	10,800,000
Preferred Stock Liquidation Preference (in dollars per share)	$ 25				$ 25
Preferred Stock, Dividend Rate, Per-Dollar-Amount					$ 1.65625
Preferred shares of beneficial interest: authorized shares	10,800,000				10,800,000	10,800,000
Series J Preferred Stock [Member] | Redeemable Preferred Stock [Member]
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				$ 25
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Preferred Stock, Value	$ 238,842				$ 238,842	$ 238,842
Preferred shares of beneficial interest: outstanding shares	9,850,000				9,850,000	9,850,000
Preferred Stock Liquidation Preference (in dollars per share)	$ 25				$ 25
Preferred Stock, Dividend Rate, Per-Dollar-Amount					$ 1.71875
Preferred shares of beneficial interest: authorized shares	9,850,000				9,850,000	9,850,000
Series K Preferred Stock [Member] | Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage					5.70%
Preferred Stock Redemption Price Per Share	$ 25				$ 25
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Preferred Stock, Value	$ 290,971				$ 290,971	$ 290,971
Preferred shares of beneficial interest: outstanding shares	12,000,000				12,000,000	12,000,000
Preferred Stock Liquidation Preference (in dollars per share)	$ 25				$ 25
Preferred Stock, Dividend Rate, Per-Dollar-Amount					$ 1.425
Preferred shares of beneficial interest: authorized shares	12,000,000				12,000,000	12,000,000
Series L Preferred Stock [Member] | Redeemable Preferred Stock [Member]
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock Dividend Rate Percentage					5.40%
Preferred Stock Redemption Price Per Share	$ 25				$ 25
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Preferred Stock, Value	$ 290,306				$ 290,306	$ 290,306
Preferred shares of beneficial interest: outstanding shares	12,000,000				12,000,000	12,000,000
Preferred Stock Liquidation Preference (in dollars per share)	$ 25				$ 25
Preferred Stock, Dividend Rate, Per-Dollar-Amount					$ 1.35
Preferred shares of beneficial interest: authorized shares	12,000,000				12,000,000	12,000,000

Shareholders' Equity (Details 1

Shareholders' Equity (Details 1) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Accumulated other comprehensive (loss) income, Beginning Balance	$ 93,267
Net current period OCI	(46,346)
Accumulated other comprehensive (loss) income, Ending Balance	46,921
Interest rate Swap [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(25,803)
Net current period OCI	6,435
Accumulated other comprehensive (loss) income, Ending Balance	(19,368)
Securities available for sale [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	133,774
Net current period OCI	(55,326)
Accumulated other comprehensive (loss) income, Ending Balance	78,448
Pro Rata Share Of Non Consolidated Subsidiaries Oci [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(8,992)
Net current period OCI	(327)
Accumulated other comprehensive (loss) income, Ending Balance	(9,319)
Other [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	(5,712)
Net current period OCI	2,872
Accumulated other comprehensive (loss) income, Ending Balance	$ (2,840)

Variable Interest Entities (Det

Variable Interest Entities (Details) $ in Thousands	Dec. 31, 2015USD ($)Entities	Dec. 31, 2014USD ($)Entities
Consolidated Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Number Of Variable Interest Entities	0	0
Non Consolidated Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Number Of Variable Interest Entities	6	3
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets | $	$ 379,939	$ 286,783

Fair Value Measurements (Narrat

Fair Value Measurements (Narratives) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)Investments	Dec. 31, 2014USD ($)Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real estate fund investments	$ 574,761	$ 513,973
Real Estate Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number Of Investments Held By Fund | Investments	6	7
Real estate fund investments	$ 574,761	$ 513,973
Excess of fair value over cost	$ 208,614
Real Estate Fund [Member] | Minimum [Member]
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 [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Anticipated Investment Holding Period	5 years

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$ 150,997	$ 206,323
Real estate fund investments	574,761	513,973
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	150,997	206,323
Real estate fund investments	574,761	513,973
Deferred compensation plan assets (included in other assets)	117,475	117,284
Total assets	843,233	837,580
Mandatorily redeemable instruments (included in other liabilities)	50,561	55,097
Interest rate swap (included in other liabilities)	19,600	25,797
Total liabilities	$ 70,161	$ 80,894
Other Partners Ownership Interest In Real Estate Fund (in percentage)	75.00%	75.00%
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate, Net at Fair Value	$ 0	$ 4,848
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	150,997	206,323
Real estate fund investments	0	0
Deferred compensation plan assets (included in other assets)	58,289	53,969
Total assets	209,286	260,292
Mandatorily redeemable instruments (included in other liabilities)	50,561	55,097
Interest rate swap (included in other liabilities)	0	0
Total liabilities	50,561	55,097
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate, Net at Fair Value		0
Fair Value Inputs Level 2 Member | Fair Value, Measurements, Recurring [Member]
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
Total assets	0	0
Mandatorily redeemable instruments (included in other liabilities)	0	0
Interest rate swap (included in other liabilities)	19,600	25,797
Total liabilities	19,600	25,797
Fair Value Inputs Level 2 Member | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate, Net at Fair Value		0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	0	0
Real estate fund investments	574,761	513,973
Deferred compensation plan assets (included in other assets)	59,186	63,315
Total assets	633,947	577,288
Mandatorily redeemable instruments (included in other liabilities)	0	0
Interest rate swap (included in other liabilities)	0	0
Total liabilities	$ 0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate, Net at Fair Value		$ 4,848

Fair Value Measurements (Deta80

Fair Value Measurements (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Real Estate Fund [Member]
Unobservable Quantitative Input [Abstract]
Beginning balance	$ 513,973	$ 667,710
Purchases	95,010	3,392
Sales/Dispositions/distributions	(91,450)	(307,268)
Net unrealized gains	54,995	73,802
Net realized gains	2,757	76,337
Other, net	(524)	0
Ending balance	$ 574,761	513,973
Real Estate Fund [Member] | Minimum [Member]
Unobservable Quantitative Input [Abstract]
Discount rates	12.00%
Capitalization rate	4.80%
Real Estate Fund [Member] | Maximum [Member]
Unobservable Quantitative Input [Abstract]
Discount rates	14.90%
Capitalization rate	6.10%
Real Estate Fund [Member] | Weighted Average [Member]
Unobservable Quantitative Input [Abstract]
Discount rates	13.60%
Capitalization rate	5.50%
Deferred Compensation Plan Assets [Member]
Unobservable Quantitative Input [Abstract]
Beginning balance	$ 63,315	68,782
Purchases	9,062	14,162
Sales/Dispositions/distributions	(13,252)	(24,951)
Realized and unrealized gain	(501)	3,415
Other, net	562	1,907
Ending balance	$ 59,186	$ 63,315

Fair Value Measurements (Deta81

Fair Value Measurements (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured Debt, Total	$ 844,159	$ 1,342,494
Senior Unsecured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured debt, gross	850,000	1,350,000
Unsecured Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured debt, gross	187,500	0
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	1,295,980	749,418
Mortgage and mezzanine loans receivable (included in other assets)	0	16,748
Total assets	1,295,980	766,166
Mortgages payable, gross	9,614,838	8,261,055
Unsecured revolving credit facilities	550,000	0
Unsecured Debt, Total	11,202,338	9,611,055
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Senior Unsecured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured debt, gross	850,000	1,350,000
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Unsecured Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured debt, gross	187,500	0
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	1,296,000	749,000
Mortgage and mezzanine loans receivable (included in other assets)	0	17,000
Total assets	1,296,000	766,000
Mortgages payable, gross	9,306,000	8,224,000
Unsecured revolving credit facilities	550,000	0
Unsecured Debt, Total	10,911,500	9,609,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Senior Unsecured Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured debt, gross	868,000	1,385,000
Estimate of Fair Value, Fair Value Disclosure [Member] | Unsecured Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unsecured debt, gross	$ 187,500	$ 0

Stock-based Compensation (Narra

Stock-based Compensation (Narratives) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	$ 39,846	$ 36,641	$ 34,914
Corporate general and administrative expenses in 2016 due to accelerated compensation expenses	2,940
Corporate general and administrative expenses after 2016 due to accelerated compensation expenses	$ 3,277
Full Value Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized (in Shares)	6,000,000
Share Based Compensation Shares Available For Grant (in Shares)	3,570,000
Not Full Value Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized (in Shares)	12,000,000
Out Performance Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	$ 15,531	6,185	3,226
Additional Expense From Acceleration Of Vesting	$ 6,217
Revised Age Limit For Awards Vesting Criteria	65 years
Out Performance Plan [Abstract]
Award vesting in three years	33.00%
Award versting in four years	33.00%
Award vesting in five years	34.00%
Compensation Cost Not Yet Recognized	$ 5,087
Compensation Cost Recognition Period	1 year 8 months 12 days
Out Performance Plan 2015 [Member]
Out Performance Plan [Abstract]
Required award holding period after vesting	1 year
Grant-Date Fair Value	$ 9,120
Award Amortization Period	5 years
Out Performance Plan 2015 [Member] | Absolute [Member]
Out Performance Plan [Abstract]
Duration Of Performance Measurement Period	3 years
Required Shareholder Return Per Year	7.00%
Required Shareholder Return Three Year	21.00%
Out Performance Plan 2015 [Member] | Relative [Member]
Out Performance Plan [Abstract]
Duration Of Performance Measurement Period	3 years
Required Shareholder Return Under Relative Component	6.00%
Percentage Of Shareholder Return Under Which No Awards Will Be Earned	0.00%
Out Performance Plan 2014 [Member]
Out Performance Plan [Abstract]
Required award holding period after vesting	1 year
Grant-Date Fair Value	$ 8,202
Award Amortization Period	5 years
Out Performance Plan 2014 [Member] | Absolute [Member]
Out Performance Plan [Abstract]
Duration Of Performance Measurement Period	3 years
Required Shareholder Return Per Year	7.00%
Required Shareholder Return Three Year	21.00%
Out Performance Plan 2014 [Member] | Relative [Member]
Out Performance Plan [Abstract]
Duration Of Performance Measurement Period	3 years
Required Shareholder Return Under Relative Component	6.00%
Percentage Of Shareholder Return Under Which No Awards Will Be Earned	0.00%
Out Performance Plan 2013 [Member]
Out Performance Plan [Abstract]
Required award holding period after vesting	1 year
Grant-Date Fair Value	$ 6,814
Award Amortization Period	5 years
Out Performance Plan 2012 [Member]
Out Performance Plan [Abstract]
Grant-Date Fair Value	$ 12,250
Award Amortization Period	5 years
Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	$ 1,298	$ 4,550	$ 8,234
Out Performance Plan [Abstract]
Compensation Cost Not Yet Recognized	$ 1,325
Compensation Cost Recognition Period	1 year 8 months 12 days
Stock options expiration term	10 years
Award Vesting Period	4 years
Share Based Compensation Employee Stock Purchase Plan Activity [Abstract]
Grant Date Fair Value Of Options (in dollars per shares)	$ 28.85	$ 20.31	$ 17.18
Cash Received From Exercise Of Stock Options	$ 15,343	$ 17,441	$ 5,915
Total Intrinsic Value Of Options Excercised	3,873	18,223	3,386
Restricted Stock Units RSU [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	837	1,303	1,344
Out Performance Plan [Abstract]
Compensation Cost Not Yet Recognized	$ 1,315
Compensation Cost Recognition Period	1 year 8 months 12 days
Dividends Paid On Nonvested Units	$ 58	88	110
Grant-Date Fair Value	$ 906	1,048	857
Award Vesting Period	4 years
Fair Value Of Awards Vested	$ 882	1,174	1,194
Restricted Operating Partnership Units Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	22,180	24,603	22,110
Out Performance Plan [Abstract]
Compensation Cost Not Yet Recognized	$ 18,625
Compensation Cost Recognition Period	1 year 7 months 6 days
Dividends Paid On Nonvested Units	$ 2,414	2,866	2,598
Grant-Date Fair Value	$ 20,293	19,669	31,947
Award Vesting Period	4 years
Fair Value Of Awards Vested	$ 20,072	$ 22,758	$ 16,404

Stock-based Compensation (Detai

Stock-based Compensation (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock Units RSU [Member]
Share Based Compensation Equity Instruments Other Than Stock Options And Restricted Stock Units Summary [Abstract]
Grant-Date Fair Value	$ 906,000	$ 1,048,000	$ 857,000
Share Based Compensation Equity Instruments Other Than Options Plan Activity [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period	$ 78.32
Units Granted Weighted Average Grant Date Fair Value	110.84
Awards Vested Weighted Average Grant Date Fair Value	78.08
Units Cancelled or Expired Weighted Average Grant Date Fair Value	88.69
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, End of Period	$ 91.09	$ 78.32
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance	24,478
Restricted Stock Granted Shares	8,177
Vested Units	(11,298)
Cancelled or Expired Units	(1,765)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance	19,592	24,478
Restricted Operating Partnership Units Plan [Member]
Share Based Compensation Equity Instruments Other Than Stock Options And Restricted Stock Units Summary [Abstract]
Grant-Date Fair Value	$ 20,293,000	$ 19,669,000	$ 31,947,000
Share Based Compensation Equity Instruments Other Than Options Plan Activity [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period	$ 74.38
Units Granted Weighted Average Grant Date Fair Value	102.75
Awards Vested Weighted Average Grant Date Fair Value	74.22
Units Cancelled or Expired Weighted Average Grant Date Fair Value	83.89
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, End of Period	$ 83.07	$ 74.38
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance	721,662
Restricted Stock Granted Shares	197,497
Vested Units	(270,443)
Cancelled or Expired Units	(9,699)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance	639,017	721,662
Employee Stock Option [Member]
Share Based Compensation Employee Stock Purchase Plan Activity [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 60.82
Stock Options Granted Weighted Average Exercise Price	112.10
Stock Options Exercised Weighted Average Exercise Price	82.21
Stock Options Cancelled or Expired Weighted Average Exercise Price	100.21
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, End of Period	$ 60.06	$ 60.82
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance	2,965,968
Stock Options Granted Shares	35,208
Stock Options Exercised Shares	(160,266)
Stock Options Cancelled or Expired Shares	(13,340)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	2,827,570	2,965,968
Options Vested And Expected To Vest Shares	2,826,685
Options Vested And Expected To Vest Weighted Average Exercise Price	$ 60.06
Options Excercisable Shares	2,741,863
Options Excercisable Weighted Average Exercise Price	$ 59.08
Options Exercisable Weighted Average Remaining Contractual Term	3 years 9 months 18 days
Options Outstanding Weighted Average Remaining Contractual Term	4 years
Options Vested And Expected To Vest Weighted Average Remaining Contractual Term	4 years
Options Outstanding Aggregate Intrinsic Value (in US dollars)	$ 115,796,000
Options Vested And Expected To Vest Aggregate Intrinsic Value (in US dollars)	115,788,000
Options Excercisable Aggregate Intrinsic Value (in US dollars)	$ 114,653,000
Fair Value Assumptions Expected Volatility Rate	35.00%	36.00%	36.00%
Fair Value Assumptions Expected Life	5 years	5 years	5 years
Fair Value Assumptions Risk Free Interest Rate	1.56%	1.81%	0.91%
Fair Value Assumptions Risk Expected Dividend Yield (in percentage)	3.30%	4.10%	4.30%
Out Performance Plan 2015 [Member]
Share Based Compensation Equity Instruments Other Than Stock Options And Restricted Stock Units Summary [Abstract]
Out of performance plan notional amount	$ 40,000,000
Grant-Date Fair Value	$ 9,120,000
OPP Units Earned, String	To be determined in 2017
Out Performance Plan 2014 [Member]
Share Based Compensation Equity Instruments Other Than Stock Options And Restricted Stock Units Summary [Abstract]
Out of performance plan notional amount	$ 50,000,000
Grant-Date Fair Value	$ 8,202,000
OPP Units Earned, String	To be determined in 2016
Out Performance Plan 2013 [Member]
Share Based Compensation Equity Instruments Other Than Stock Options And Restricted Stock Units Summary [Abstract]
Out of performance plan notional amount	$ 40,000,000
Grant-Date Fair Value	$ 6,814,000
OPP Units Earned	85,420
Out Performance Plan 2012 [Member]
Share Based Compensation Equity Instruments Other Than Stock Options And Restricted Stock Units Summary [Abstract]
Out of performance plan notional amount	$ 40,000,000
Grant-Date Fair Value	$ 12,250,000
OPP Units Earned	303,202

Fee and Other Income (Details)

Fee and Other Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fee And Other Income [Line Items]
BMS cleaning fees	$ 82,113	$ 85,658	$ 66,505
Lease termination fees	27,233	16,362	32,630
Management and leasing fees	16,831	19,905	23,073
Other income	38,528	33,281	33,363
Fee and other income	164,705	$ 155,206	155,571
1290 Avenue of the Americas [Member]
Fee And Other Income [Line Items]
Lease termination fees			19,500
Write Off Of Straight Lining Of Rent			$ 1,529
Equity method ownership percentage			70.00%
Cuyahoga County [Member]
Fee And Other Income [Line Items]
Lease termination fees			$ 3,000
20 Broad Street [Member]
Fee And Other Income [Line Items]
Lease termination income	$ 15,000
Vornado Realty Trust [Member] | 1290 Avenue of the Americas [Member]
Fee And Other Income [Line Items]
Lease termination fees			$ 12,121

Interest and Other Investment85

Interest and Other Investment Income (Loss), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest and Other Investment Income (Loss), Net [Abstract]
Dividends on marketable securities	$ 12,836	$ 12,707	$ 11,446
Interest on loans receivable	6,371	6,107	20,683
Mark-to-market of investments in our deferred compensation plan	111	11,557	10,636
Losses from the disposition of investment in J.C. Penney	0	0	(72,974)
Other, net	7,660	8,381	5,322
Interest and other investment (loss) income, net	$ 26,978	$ 38,752	$ (24,887)

Interest and Debt Expense (Deta

Interest and Debt Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest and Debt Expense [Abstract]
Interest expense	$ 405,169	$ 430,278	$ 444,412
Amortization of deferred financing costs	32,161	45,263	23,673
Capitalized interest and debt expenses	(59,305)	(62,786)	(42,303)
Interest and Debt Expense, Total	$ 378,025	$ 412,755	$ 425,782

Income Per Share (Details)

Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Per Share [Abstract]
Income (loss) from continuing operations, net of income attributable to noncontrolling interests									$ 711,240	$ 312,700	$ (56,727)
Income from discontinued operations, net of income attributable to noncontrolling interests									49,194	552,152	532,698
Net income attributable to Vornado									760,434	864,852	475,971
Preferred share dividends									(80,578)	(81,464)	(82,807)
Preferred unit and share redemptions									0	0	(1,130)
Net income attributable to common shareholders	$ 230,742	$ 198,870	$ 165,651	$ 84,593	$ 513,238	$ 131,159	$ 76,642	$ 62,349	679,856	783,388	392,034
Earnings allocated to unvested participating securities									(81)	(125)	(110)
Numerator for basic income per share									679,775	783,263	391,924
Convertible preferred share dividends									91	97	0
Numerator for diluted income per share									$ 679,866	$ 783,360	$ 391,924
Denominator for basic income per share - weighted average shares (in shares)									188,353	187,572	186,941
Employee stock options and restricted share awards (in shares)									1,166	1,075	768
Convertible preferred shares									45	43	0
Denominator for diluted income per share - weighted average shares and assumed conversions (in shares)									189,564	188,690	187,709
INCOME (LOSS) PER COMMON SHARE - BASIC:
Income (loss) from continuing operations, net (in dollars per share)									$ 3.35	$ 1.23	$ (0.75)
Income from discontinued operations, net (in dollars per share)									0.26	2.95	2.85
Net income per common share - Basic (in dollars per share)	$ 1.22	$ 1.05	$ 0.88	$ 0.45	$ 2.73	$ 0.70	$ 0.41	$ 0.33	3.61	4.18	2.10
INCOME (LOSS) PER COMMON SHARE - DILUTED:
Income (loss) from continuing operations, net (in dollars per share)									3.33	1.22	(0.75)
Income from discontinued operations, net (in dollars per share)									0.26	2.93	2.84
Net income per common share - Diluted (in dollars per share)	$ 1.22	$ 1.05	$ 0.87	$ 0.45	$ 2.72	$ 0.69	$ 0.41	$ 0.33	$ 3.59	$ 4.15	$ 2.09

Income Per Share (Parenthetical

Income Per Share (Parentheticals) (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Per Share [Abstract]
Weighted average common share equivalents of excluded dilutive securities due to anti-dilutive effect	11,744	11,238	11,752

Leases (Details)

Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)Tenants	Dec. 31, 2014USD ($)Tenants	Dec. 31, 2013USD ($)Tenants
Operating Leases Future Minimum Payments Receivable [Abstract]
2,016	$ 1,633,615
2,017	1,686,056
2,018	1,644,440
2,019	1,496,805
2,020	1,349,724
Thereafter	8,103,382
Percentage Rent	5,760	$ 6,343	$ 7,344
Operating Leases Future Minimum Payments Due [Abstract]
2,016	33,265
2,017	34,831
2,018	35,317
2,019	35,826
2,020	36,353
Thereafter	$ 1,557,541
Lessee Leasing Arrangements Operating Leases Term Of Contract	30 years
Rent Expense	$ 38,887	$ 36,315	$ 35,913
Capital Leases Future Minimum Payments Due [Abstract]
2,016	12,500
2,017	12,500
2,018	12,500
2,019	12,500
2,020	12,500
Thereafter	322,292
Total Minimum Obligations	384,792
Interest Portion	(144,792)
Present Value Of Net Minimum Payments	240,000
Property Leased Under Capital Leases Cost	$ 424,369
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number Of Tenants Contributing Ten Percent Or More Of Total Revenues | Tenants	0	0	0
Percentage Of Minimum Revenue Threshold Contributed By One Tenant	10.00%	10.00%	10.00%

Multiemployer Benefit Plans (De

Multiemployer Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Multiemployer Plans, Pension [Member]
Multiemployer Benefit Plans [Line Items]
Multiemployer Plan, Period Contributions	$ 10,878	$ 11,431	$ 10,223
Multiemployer Plans, Period Contributions, Significance of Contributions	false
Multiemployer Plans, Healthcare Benefit [Member]
Multiemployer Benefit Plans [Line Items]
Multiemployer Plan, Period Contributions	$ 29,269	$ 29,073	$ 26,262

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($)	Jan. 01, 2016	Dec. 31, 2015
Loss Contingencies [Line Items]
Guarantees and master leases		$ 427,000,000
Outstanding letters of credit		38,096,000
Commitment To Fund Additional Capital To Partially Owned Entities		70,000,000
220 Central Park South [Member]
Loss Contingencies [Line Items]
Constuction commitment		873,800,000
NBCR Losses [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence		2,000,000,000
Insurance Limit Aggregate Value		$ 2,000,000,000
Federal government deductible, percentage of balance of a covered loss		85.00%
NBCR Losses [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Federal government deductible, percentage of balance of a covered loss	84.00%
Earthquake California Properties [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence		$ 180,000,000
Insurance Limit Aggregate Value		$ 180,000,000
Vornado deductible, percentage of property value		5.00%
All Risk And Rental Value [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence		$ 2,000,000,000
General Liability [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence		300,000,000
Insurance Limit Aggregate Value		300,000,000
Terrorism Acts [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence		4,000,000,000
Insurance Limit Aggregate Value		$ 4,000,000,000
Insurance Coverage End Date		December 2,020
PPIC [Member] | NBCR Losses [Member]
Loss Contingencies [Line Items]
Insurance deductible		$ 3,200,000
Insurance Deductible Percentage Of Balance Of Covered Loss		15.00%
PPIC [Member] | NBCR Losses [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Insurance deductible	$ 2,400,000
Insurance Deductible Percentage Of Balance Of Covered Loss	16.00%

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Cash Considerations Transferred During Spin Off	$ 225,000	$ 0	$ 0
Alexanders Inc [Member]
Related Party Transaction [Line Items]
Percentage of Affiliated Entity Owned By Company	32.40%
Percentage Of Affiliated Entity Owned By Related Parties	26.30%
Interstate Properties [Member]
Related Party Transaction [Line Items]
Percentage of Company Owned by Related Party	7.10%
Related Party Transaction Annual Fee Percentage	4.00%
Fee And Other Income From Related Parties (in US dollars)	$ 541	$ 535	$ 606
Term Of Management Agreement	1 year
Period Allowed For Termination Of Automatic Renewal Of Management Agreement	60 days
Related Party Transaction Description Of Transaction	We manage and lease the real estate assets of Interstate pursuant to a management agreement for which we receive an annual fee equal to 4% of annual base rent and percentage rent. The management agreement has a term of one year and is automatically renewable unless terminated by either of the parties on 60 days’ notice at the end of the term. We believe, based upon comparable fees charged by other real estate companies, that the management agreement terms are fair to us.

Summary of Quarterly Results (D

Summary of Quarterly Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 651,581	$ 627,596	$ 616,288	$ 606,802	$ 597,010	$ 578,710	$ 574,411	$ 562,381	$ 2,502,267	$ 2,312,512	$ 2,299,176
Net income attributable to common shareholders	$ 230,742	$ 198,870	$ 165,651	$ 84,593	$ 513,238	$ 131,159	$ 76,642	$ 62,349	$ 679,856	$ 783,388	$ 392,034
Net income per common share - Basic (in dollars per share)	$ 1.22	$ 1.05	$ 0.88	$ 0.45	$ 2.73	$ 0.70	$ 0.41	$ 0.33	$ 3.61	$ 4.18	$ 2.10
Net income per common share - Diluted (in dollars per share)	$ 1.22	$ 1.05	$ 0.87	$ 0.45	$ 2.72	$ 0.69	$ 0.41	$ 0.33	$ 3.59	$ 4.15	$ 2.09

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Information [Line Items]
Total Revenues	$ 651,581	$ 627,596	$ 616,288	$ 606,802	$ 597,010	$ 578,710	$ 574,411	$ 562,381	$ 2,502,267	$ 2,312,512	$ 2,299,176
Total expenses									1,742,019	1,622,619	1,624,625
Operating income (loss)									760,248	689,893	674,551
(Loss) income from partially owned entities									(12,630)	(59,861)	(340,882)
Income from real estate fund investments									74,081	163,034	102,898
Interest and other investment income (loss), net									26,978	38,752	(24,887)
Interest and debt expense									(378,025)	(412,755)	(425,782)
Net gain on disposition of wholly owned and partially owned assets									251,821	13,568	2,030
Income (loss) before income taxes									722,473	432,631	(12,072)
Income tax benefit (expense)									84,695	(9,281)	8,717
Income (loss) from continuing operations									807,168	423,350	(3,355)
Income from discontinued operations									52,262	585,676	568,095
Net income (loss)									859,430	1,009,026	564,740
Less net income attributable to noncontrolling interests									(98,996)	(144,174)	(88,769)
Net income attributable to Vornado									760,434	864,852	475,971
Interest and debt expense (2)									469,843	654,398	758,781
Depreciation and amortization (2)									664,637	685,973	732,757
Income tax (benefit) expense (2)									(85,379)	24,248	26,371
EBITDA									1,809,535	2,229,471	1,993,880
Balance Sheet Data [Abstract]
Real estate, at cost	18,090,137				16,822,358				18,090,137	16,822,358	15,392,968	$ 15,287,078
Investments in partially owned entities	1,550,422				1,240,489				1,550,422	1,240,489	1,159,803
Total assets	21,143,293				21,157,980				21,143,293	21,157,980	20,018,210
New York Segment [Member] | Operating Segments [Member]
Segment Information [Line Items]
Total Revenues									1,695,925	1,520,845	1,470,907
Total expenses									1,032,015	946,466	910,498
Operating income (loss)									663,910	574,379	560,409
(Loss) income from partially owned entities									655	20,701	15,527
Interest and other investment income (loss), net									7,722	6,711	5,357
Interest and debt expense									(194,278)	(183,427)	(181,966)
Net gain on disposition of wholly owned and partially owned assets									142,693	0	0
Income (loss) before income taxes									620,702	418,364	399,327
Income tax benefit (expense)									(4,379)	(4,305)	(2,794)
Income (loss) from continuing operations									616,323	414,059	396,533
Income from discontinued operations									0	463,163	160,314
Net income (loss)									616,323	877,222	556,847
Less net income attributable to noncontrolling interests									(13,022)	(8,626)	(10,786)
Net income attributable to Vornado									603,301	868,596	546,061
Interest and debt expense (2)									248,724	241,959	236,645
Depreciation and amortization (2)									394,028	324,239	293,974
Income tax (benefit) expense (2)									4,766	4,395	3,002
EBITDA									1,250,819	1,439,189	1,079,682
Balance Sheet Data [Abstract]
Real estate, at cost	10,577,078				9,732,818				10,577,078	9,732,818	8,422,297
Investments in partially owned entities	1,195,122				1,036,130				1,195,122	1,036,130	904,278
Total assets	12,257,774				10,706,476				12,257,774	10,706,476	9,214,055
Washington DC Segment [Member] | Operating Segments [Member]
Segment Information [Line Items]
Total Revenues									532,812	537,151	541,161
Total expenses									390,921	358,019	347,686
Operating income (loss)									141,891	179,132	193,475
(Loss) income from partially owned entities									(5,083)	(3,677)	(6,968)
Interest and other investment income (loss), net									(262)	183	129
Interest and debt expense									(68,727)	(75,395)	(102,277)
Net gain on disposition of wholly owned and partially owned assets									102,404	0	0
Income (loss) before income taxes									170,223	100,243	84,359
Income tax benefit (expense)									(317)	(242)	14,031
Income (loss) from continuing operations									169,906	100,001	98,390
Income from discontinued operations									0	0	0
Net income (loss)									169,906	100,001	98,390
Less net income attributable to noncontrolling interests									0	0	0
Net income attributable to Vornado									169,906	100,001	98,390
Interest and debt expense (2)									82,386	89,448	116,131
Depreciation and amortization (2)									179,788	145,853	142,409
Income tax (benefit) expense (2)									(1,610)	288	(15,707)
EBITDA									430,470	335,590	341,223
Balance Sheet Data [Abstract]
Real estate, at cost	4,544,842				4,383,418				4,544,842	4,383,418	4,243,048
Investments in partially owned entities	100,511				102,635				100,511	102,635	100,543
Total assets	4,536,895				4,300,628				4,536,895	4,300,628	4,098,338
Other Segment [Member]
Segment Information [Line Items]
Total Revenues									273,530	254,516	287,108
Total expenses									319,083	318,134	366,441
Operating income (loss)									(45,553)	(63,618)	(79,333)
(Loss) income from partially owned entities									(8,202)	(76,885)	(349,441)
Income from real estate fund investments									74,081	163,034	102,898
Interest and other investment income (loss), net									19,518	31,858	(30,373)
Interest and debt expense									(115,020)	(153,933)	(141,539)
Net gain on disposition of wholly owned and partially owned assets									6,724	13,568	2,030
Income (loss) before income taxes									(68,452)	(85,976)	(495,758)
Income tax benefit (expense)									89,391	(4,734)	(2,520)
Income (loss) from continuing operations									20,939	(90,710)	(498,278)
Income from discontinued operations									52,262	122,513	407,781
Net income (loss)									73,201	31,803	(90,497)
Less net income attributable to noncontrolling interests									(85,974)	(135,548)	(77,983)
Net income attributable to Vornado									(12,773)	(103,745)	(168,480)
Interest and debt expense (2)									138,733	322,991	406,005
Depreciation and amortization (2)									90,821	215,881	296,374
Income tax (benefit) expense (2)									(88,535)	19,565	39,076
EBITDA									128,246	454,692	572,975
Balance Sheet Data [Abstract]
Real estate, at cost	2,968,217				2,706,122				2,968,217	2,706,122	2,727,623
Investments in partially owned entities	254,789				101,724				254,789	101,724	154,982
Total assets	$ 4,348,624				$ 6,150,876				$ 4,348,624	$ 6,150,876	$ 6,705,817

Segment Information (Parentheti

Segment Information (Parentheticals) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	$ 1,809,535	$ 2,229,471	$ 1,993,880
Carrying amount of investments in partially owned entitiies	1,550,422	1,240,489	1,159,803
Non cash impairment losses		(85,459)	(281,098)
Mark-to-market of investments in our deferred compensation plan	111	11,557	10,636
Corporate general and administrative expenses in 2016 due to accelerated compensation expenses	2,940
Corporate general and administrative expenses after 2016 due to accelerated compensation expenses	3,277
Out Performance Plan [Member]
Segment Information [Line Items]
Additional Expense From Acceleration Of Vesting	$ 6,217
Revised Age Limit For Awards Vesting Criteria	65 years
Our share of Toys "R" Us [Member]
Segment Information [Line Items]
Carrying amount of investments in partially owned entitiies				$ 0
Non cash impairment losses		75,196	240,757
New York Segment [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	$ 1,250,819	1,439,189	1,079,682
Carrying amount of investments in partially owned entitiies	1,195,122	1,036,130	904,278
New York Segment [Member] | Net Gain On Sale Of Real Estate [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	142,693	440,537	127,512
New York Segment [Member] | Alexanders Inc [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	42,858	41,746	42,210
New York Segment [Member] | Hotel Pennsylvania [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	23,044	30,753	30,723
New York Segment [Member] | Residential Properties [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	22,266	21,907	20,420
New York Segment [Member] | Retail Properties [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	358,379	281,428	246,808
New York Segment [Member] | Office [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	661,579	622,818	612,009
Washington DC Segment [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	430,470	335,590	341,223
Carrying amount of investments in partially owned entitiies	100,511	102,635	100,543
Washington DC Segment [Member] | Washington Dc Office Excluding Skyline Properties [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	264,864	266,859	268,373
Washington DC Segment [Member] | Net gain on sale of 1750 Pennsylvania Avenue [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	102,404	0	0
Washington DC Segment [Member] | Skyline Properties [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	24,224	27,150	29,499
Washington DC Segment [Member] | Residential Properties [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	38,978	41,581	43,351
Washington DC Segment [Member] | Office [Member] | Operating Segments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	391,492	294,009	297,872
Other Segment [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	128,246	454,692	572,975
Carrying amount of investments in partially owned entitiies	254,789	101,724	154,982
Other Segment [Member] | Real Estate Fund [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	33,964	70,306	49,471
Other Segment [Member] | The Mart and trade shows [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	79,159	79,636	74,270
Other Segment [Member] | 555 California Street [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	49,975	48,844	42,667
Other Segment [Member] | India real estate ventures [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	3,933	6,434	5,841
Other Segment [Member] | Our share of Toys "R" Us [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	2,500	103,632	(12,081)
Other Segment [Member] | Other Investments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	38,141	16,896	45,856
Other Segment [Member] | Corporate General And Administrative Expenses [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	(106,416)	(94,929)	(94,904)
Other Segment [Member] | Investment Income and other, net [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	26,385	31,665	46,525
Other Segment [Member] | Our share of impairment loss on India real estate ventures [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	(14,806)	(5,771)	0
Other Segment [Member] | Gains on sale of partially owned entities and other [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	37,666	13,000	0
Other Segment [Member] | UE and residual retail properties discontinued operations [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	28,314	245,679	541,516
Other Segment [Member] | Acquisition and transaction related costs [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	(12,511)	(16,392)	(24,857)
Other Segment [Member] | Net gain on sale of marketable securities, land parcels and residential condominiums [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	6,724	13,568	56,868
Other Segment [Member] | Net income attributable to noncontrolling interests in the Operating Partnership [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	(43,231)	(47,613)	(24,817)
Other Segment [Member] | Impairment loss and loan loss reserve on investment in Suffolk Downs [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	(1,551)	(10,263)	0
Other Segment [Member] | Losses from the disposition of investment in J.C. Penney [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	0	(127,888)
Other Segment [Member] | Severance costs (primarily reduction in force at the Mart) [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	0	(5,492)
Other Segment [Member] | Other EBITDA attributable to identifiable investments [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	207,672	325,748	206,024
Other Segment [Member] | Income before net realized/unrealized gains [Member] | Real Estate Fund [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	8,611	8,056	7,752
Other Segment [Member] | Net unrealized/realized gains on investments [Member] | Real Estate Fund [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	14,657	37,535	23,489
Other Segment [Member] | Carried Interest [Member] | Real Estate Fund [Member]
Segment Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	$ 10,696	$ 24,715	$ 18,230

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event [Member] - Out Performance Plan 2016 [Member]	Jan. 14, 2016shares
Stock-based Compensation [Abstract]
Number Of Awards when TSR 0% (in Shares)	0
Percentage Of Shareholder Return Under Which No Awards Will Be Earned	0.00%
Required award holding period after vesting	1 year
Absolute [Member]
Stock-based Compensation [Abstract]
Duration Of Performance Measurement Period	3 years
Required Shareholder Return Per Year	7.00%
Required Shareholder Return Three Year	21.00%
Required Shareholder Return Under Relative Component	3.00%
Relative [Member]
Stock-based Compensation [Abstract]
Duration Of Performance Measurement Period	3 years

Subsequent Events (Details 1)

Subsequent Events (Details 1) ft² in Thousands	Feb. 08, 2016USD ($)ft²	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Feb. 11, 2016
Subsequent Events [Line Items]
Net proceeds from borrowings		$ 4,468,872,000	$ 2,428,285,000	$ 2,262,245,000
Mortgages payable, net		$ 9,513,713,000	$ 8,187,843,000
770 Broadway [Member]
Subsequent Events [Line Items]
Interest Rate, End of Period (in percentage)		5.65%
Mortgages payable, net		$ 353,000,000
Debt Instrument Maturity		March 2,016
770 Broadway [Member] | Subsequent Event [Member]
Subsequent Events [Line Items]
Notes And Loans Payable Refinanced Amount (in US Dollars)	$ 700,000,000
Square Footage Of Real Estate Property | ft²	1,158
Debt Term	5 years
Debt Instrument, Description of Variable Rate Basis	LIBOR
Debt Instrument, Basis Spread on Variable Rate	1.75%
Interest Rate, End of Period (in percentage)					2.18%
Net proceeds from borrowings	$ 330,000,000
770 Broadway [Member] | Subsequent Event [Member] | Fixed Rate [Member]
Subsequent Events [Line Items]
Debt Term	4 years 6 months
Interest Rate, End of Period (in percentage)	2.56%

SEC Schedule II Valuation and98

SEC Schedule II Valuation and Qualifying Accounts (Details) - Allowance For Doubtful Accounts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 21,209	$ 24,719	$ 28,675
Additions Charged Against Operations	(99)	3,076	9,326
Uncollectable Accounts Written-Off	(6,451)	(6,586)	(13,282)
Balance at End of Year	$ 14,659	$ 21,209	$ 24,719

SEC Schedule III Real Estate (D

SEC Schedule III Real Estate (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)Properties	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2012USD ($)
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 9,614,838
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,210,570
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,480,028
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,692,399
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,164,799
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,925,338
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	18,090,137
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,418,267	$ 3,161,633	$ 2,829,862	$ 2,524,718
Property Plant And Equipment Useful Life	40 years
Net Basis Difference Of Assets And Liabilities Between Tax Basis And GAAP Basis	$ 3,400,000
New York Segment [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	5,464,905
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,656,750
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,781,814
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,115,700
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,747,173
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,807,091
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	10,554,264
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,814,559
New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	5,464,905
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,626,847
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,660,102
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,003,752
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,716,237
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,574,464
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	10,290,701
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,706,483
Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	2,003,321
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,032,753
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,346,679
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,438,737
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,032,853
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,492,456
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,525,309
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,050,700
Other Segment [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	2,146,612
Real Estate And Accumulated Depreciation Initial Cost Of Land	521,067
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,351,535
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,021,932
Real Estate And Accumulated Depreciation Carrying Amount Of Land	384,773
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,509,761
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,894,534
Real Estate And Accumulated Depreciation Accumulated Depreciation	467,145
Other Segment [Member] | Illinois [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	550,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	69,694
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	319,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	307,338
Real Estate And Accumulated Depreciation Carrying Amount Of Land	69,701
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	626,477
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	696,178
Real Estate And Accumulated Depreciation Accumulated Depreciation	232,480
1290 Avenue of the Americas [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	950,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	515,539
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	923,653
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	156,868
Real Estate And Accumulated Depreciation Carrying Amount Of Land	515,540
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,080,520
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,596,060
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 233,742
Real Estate And Accumulated Depreciation Year Of Construction	1,963
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
697-703 Fifth Avenue (St. Regis - retail) [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 450,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	152,825
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	584,230
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	152,825
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	584,230
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	737,055
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 17,197
Real Estate And Accumulated Depreciation Year Of Acquisition	2,014
350 Park Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 289,242
Real Estate And Accumulated Depreciation Initial Cost Of Land	265,889
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	363,381
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	45,811
Real Estate And Accumulated Depreciation Carrying Amount Of Land	265,889
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	409,192
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	675,081
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 94,115
Real Estate And Accumulated Depreciation Year Of Construction	1,960
Real Estate And Accumulated Depreciation Year Of Acquisition	2,006
666 Fifth Avenue (Retail Condo) [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 390,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	189,005
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	471,072
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	189,005
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	471,072
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	660,077
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 37,030
Real Estate And Accumulated Depreciation Year Of Acquisition	2,012
One Penn Plaza [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	412,169
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	200,348
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	612,517
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	612,517
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 261,693
Real Estate And Accumulated Depreciation Year Of Construction	1,972
Real Estate And Accumulated Depreciation Year Of Acquisition	1,998
100 West 33rd Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 398,402
Real Estate And Accumulated Depreciation Initial Cost Of Land	242,776
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	247,970
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	31,934
Real Estate And Accumulated Depreciation Carrying Amount Of Land	242,776
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	279,904
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	522,680
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 61,476
Real Estate And Accumulated Depreciation Year Of Construction	1,911
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
150 West 34th Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 205,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	119,657
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	268,509
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1
Real Estate And Accumulated Depreciation Carrying Amount Of Land	119,658
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	268,509
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	388,167
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,916
Real Estate And Accumulated Depreciation Year Of Construction	1,900
Real Estate And Accumulated Depreciation Year Of Acquisition	2,015
1535 Broadway (Marriott Marquis) [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	249,285
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	137,101
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	386,386
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	386,386
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 4,796
Real Estate And Accumulated Depreciation Year Of Acquisition	2,012
1540 Broadway [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	110,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	223,122
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	26,714
Real Estate And Accumulated Depreciation Carrying Amount Of Land	110,001
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	249,835
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	359,836
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 43,592
Real Estate And Accumulated Depreciation Year Of Acquisition	2,006
655 Fifth Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 140,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	102,594
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	231,903
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	102,594
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	231,903
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	334,497
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 13,149
Real Estate And Accumulated Depreciation Year Of Acquisition	2,013
Two Penn Plaza [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 575,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	53,615
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	164,903
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	98,098
Real Estate And Accumulated Depreciation Carrying Amount Of Land	52,689
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	263,927
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	316,616
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 133,450
Real Estate And Accumulated Depreciation Year Of Construction	1,968
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
90 Park Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	175,890
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	96,269
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	272,159
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	280,159
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 98,331
Real Estate And Accumulated Depreciation Year Of Construction	1,964
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
Manhattan Mall [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 181,598
Real Estate And Accumulated Depreciation Initial Cost Of Land	88,595
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	113,473
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	71,400
Real Estate And Accumulated Depreciation Carrying Amount Of Land	88,595
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	184,873
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	273,468
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 48,993
Real Estate And Accumulated Depreciation Year Of Construction	2,009
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
770 Broadway [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 353,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	52,898
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	95,686
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	97,290
Real Estate And Accumulated Depreciation Carrying Amount Of Land	52,898
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	192,976
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	245,874
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 75,613
Real Estate And Accumulated Depreciation Year Of Construction	1,907
Real Estate And Accumulated Depreciation Year Of Acquisition	1,998
888 Seventh Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 375,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	117,269
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	115,848
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	233,117
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	233,117
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 97,680
Real Estate And Accumulated Depreciation Year Of Construction	1,980
Real Estate And Accumulated Depreciation Year Of Acquisition	1,998
909 Third Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 350,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	120,723
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	80,715
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	201,438
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	201,438
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 76,663
Real Estate And Accumulated Depreciation Year Of Construction	1,969
Real Estate And Accumulated Depreciation Year Of Acquisition	1,999
Eleven Penn Plaza [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 450,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	40,333
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	85,259
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	72,995
Real Estate And Accumulated Depreciation Carrying Amount Of Land	40,333
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	158,254
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	198,587
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 60,765
Real Estate And Accumulated Depreciation Year Of Construction	1,923
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
7 West 34th Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	182,067
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,614
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	147,453
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	182,067
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 62,011
Real Estate And Accumulated Depreciation Year Of Construction	1,901
Real Estate And Accumulated Depreciation Year Of Acquisition	2,000
640 Fifth Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	38,224
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	25,992
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	102,472
Real Estate And Accumulated Depreciation Carrying Amount Of Land	38,224
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	128,464
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	166,688
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 41,282
Real Estate And Accumulated Depreciation Year Of Construction	1,950
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
150 East 58th Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	39,303
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	80,216
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	40,870
Real Estate And Accumulated Depreciation Carrying Amount Of Land	39,303
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	121,086
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	160,389
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 50,879
Real Estate And Accumulated Depreciation Year Of Construction	1,969
Real Estate And Accumulated Depreciation Year Of Acquisition	1,998
595 Madison Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	62,731
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	62,888
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	26,218
Real Estate And Accumulated Depreciation Carrying Amount Of Land	62,731
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	89,106
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	151,837
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 33,566
Real Estate And Accumulated Depreciation Year Of Construction	1,968
Real Estate And Accumulated Depreciation Year Of Acquisition	1,999
828 To 850 Madison Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 80,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	107,937
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	28,261
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10
Real Estate And Accumulated Depreciation Carrying Amount Of Land	107,937
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	28,271
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	136,208
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 7,538
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
33-00 Northern Boulevard [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 61,759
Real Estate And Accumulated Depreciation Initial Cost Of Land	46,505
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	86,226
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	46,505
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	86,226
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	132,731
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,189
Real Estate And Accumulated Depreciation Year Of Construction	1,915
Real Estate And Accumulated Depreciation Year Of Acquisition	2,015
330 West 34th Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,599
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	111,810
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	120,409
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	120,409
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 6,530
Real Estate And Accumulated Depreciation Year Of Construction	1,925
Real Estate And Accumulated Depreciation Year Of Acquisition	1,998
715 Lexington Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,903
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	63,002
Real Estate And Accumulated Depreciation Carrying Amount Of Land	63,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,905
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	89,905
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 7,243
Real Estate And Accumulated Depreciation Year Of Construction	1,923
Real Estate And Accumulated Depreciation Year Of Acquisition	2,001
478 To 486 Broadway [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	30,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,063
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	33,827
Real Estate And Accumulated Depreciation Carrying Amount Of Land	30,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	53,890
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	83,890
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 9,610
Real Estate And Accumulated Depreciation Year Of Construction	2,009
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
4 Union Square South [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 117,904
Real Estate And Accumulated Depreciation Initial Cost Of Land	24,079
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	55,220
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,610
Real Estate And Accumulated Depreciation Carrying Amount Of Land	24,080
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	57,829
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	81,909
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,392
Real Estate And Accumulated Depreciation Year Of Construction	1965/2004
Real Estate And Accumulated Depreciation Year Of Acquisition	1,993
260 11th Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	80,482
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	80,492
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	80,492
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 943
Real Estate And Accumulated Depreciation Year Of Construction	1,911
Real Estate And Accumulated Depreciation Year Of Acquisition	2,015
510 5th Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	34,602
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	18,728
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	19,227
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,602
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	37,955
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	72,557
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 5,820
Real Estate And Accumulated Depreciation Year Of Acquisition	2,010
40 Fulton Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,732
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,388
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	15,153
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,732
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	41,541
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	57,273
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,888
Real Estate And Accumulated Depreciation Year Of Construction	1,987
Real Estate And Accumulated Depreciation Year Of Acquisition	1,998
689 Fifth Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,721
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,446
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	22,809
Real Estate And Accumulated Depreciation Carrying Amount Of Land	19,721
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	36,255
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	55,976
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 9,492
Real Estate And Accumulated Depreciation Year Of Construction	1,925
Real Estate And Accumulated Depreciation Year Of Acquisition	1,998
443 Broadway [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,187
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	41,186
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,187
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	41,186
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	52,373
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,693
Real Estate And Accumulated Depreciation Year Of Acquisition	2,013
40 East 66th Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,616
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	34,635
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	142
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,616
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	34,777
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	48,393
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,739
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
155 Spring Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	30,544
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,582
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	33,126
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	46,826
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 7,527
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
435 Seventh Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 98,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,893
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	19,091
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	37
Real Estate And Accumulated Depreciation Carrying Amount Of Land	19,893
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,128
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	39,021
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 6,449
Real Estate And Accumulated Depreciation Year Of Construction	2,002
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
3040 M Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,830
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	27,490
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,256
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,830
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	30,746
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	38,576
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 7,960
Real Estate And Accumulated Depreciation Year Of Acquisition	2,006
608 Fifth Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	33,906
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	33,906
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	33,906
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,601
Real Estate And Accumulated Depreciation Year Of Construction	1,932
Real Estate And Accumulated Depreciation Year Of Acquisition	2,012
692 Broadway [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,053
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	22,908
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,540
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,053
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,448
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	32,501
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 6,895
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
265 West 34th Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	28,500
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	28,500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	28,500
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Year Of Construction	1,920
Real Estate And Accumulated Depreciation Year Of Acquisition	2,015
677 To 679 Madison Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,070
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,640
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	388
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,028
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	23,098
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 2,401
Real Estate And Accumulated Depreciation Year Of Acquisition	2,006
1131 Third Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,844
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,844
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,198
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,844
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,042
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	20,886
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 719
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
431 Seventh Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	16,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,751
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	16,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,751
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	19,451
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 602
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
138-142 West 32nd Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	9,252
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,936
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,252
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,936
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	19,188
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 228
Real Estate And Accumulated Depreciation Year Of Construction	1,920
Real Estate And Accumulated Depreciation Year Of Acquisition	2,015
304 Canal Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,511
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	12,905
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,109
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	17,525
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	17,525
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Year Of Construction	1,910
Real Estate And Accumulated Depreciation Year Of Acquisition	2,014
334 Canal Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,693
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,507
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	7,264
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,693
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,771
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,464
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 221
Real Estate And Accumulated Depreciation Year Of Acquisition	2,011
267 West 34th Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,099
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,037
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,099
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,037
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,136
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 548
Real Estate And Accumulated Depreciation Year Of Acquisition	2,013
966 Third Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,869
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,631
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,869
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,631
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,500
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 212
Real Estate And Accumulated Depreciation Year Of Acquisition	2,013
148 Spring Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,200
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,112
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	406
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,518
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,718
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,621
Real Estate And Accumulated Depreciation Year Of Acquisition	2,008
150 Spring Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,200
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,822
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	258
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,080
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,280
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,175
Real Estate And Accumulated Depreciation Year Of Acquisition	2,008
137 West 33rd Street [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,398
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,550
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,398
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,550
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,948
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 29
Real Estate And Accumulated Depreciation Year Of Construction	1,932
Real Estate And Accumulated Depreciation Year Of Acquisition	2,015
488 8th Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,650
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,767
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(4,674)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,859
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	884
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,743
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 178
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
484 8th Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,856
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	762
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	399
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,856
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,161
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,017
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 365
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
825 7th Avenue [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,483
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	697
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	33
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,483
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	730
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,213
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 341
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
Other (Including Signage) [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	70,683
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,378
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	98,431
Real Estate And Accumulated Depreciation Carrying Amount Of Land	70,683
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	118,809
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	189,492
Real Estate And Accumulated Depreciation Accumulated Depreciation	21,395
Paramus [Member] | New York Segment [Member] | New Jersey [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	25,339
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,033
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	24,306
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	25,339
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 12,194
Real Estate And Accumulated Depreciation Year Of Construction	1,967
Real Estate And Accumulated Depreciation Year Of Acquisition	1,987
Hotel Pennsylvania [Member] | New York Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	29,903
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	121,712
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	86,609
Real Estate And Accumulated Depreciation Carrying Amount Of Land	29,903
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	208,321
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	238,224
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 95,882
Real Estate And Accumulated Depreciation Year Of Construction	1,919
Real Estate And Accumulated Depreciation Year Of Acquisition	1,997
2011-2451 Crystal Drive - 5 buildings [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 220,248
Real Estate And Accumulated Depreciation Initial Cost Of Land	100,935
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	409,920
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	149,218
Real Estate And Accumulated Depreciation Carrying Amount Of Land	100,228
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	559,845
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	660,073
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 213,614
Real Estate And Accumulated Depreciation Year Of Construction	1984-1989
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
Number Of Real Estate Properties | Properties	5
Skyline Properties- 8 buildings [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 696,319
Real Estate And Accumulated Depreciation Initial Cost Of Land	64,544
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	355,563
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	88,132
Real Estate And Accumulated Depreciation Carrying Amount Of Land	64,355
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	443,884
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	508,239
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 152,263
Real Estate And Accumulated Depreciation Year Of Construction	1973-2001
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
Number Of Real Estate Properties | Properties	8
2001 Jefferson Davis Highway, 2100/2200 Crystal Drive, 223 23rd Street, 2221 South Clark Street, Crystal City Shops at 2100, 220 20th Street [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 69,869
Real Estate And Accumulated Depreciation Initial Cost Of Land	57,213
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	131,206
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	404,016
Real Estate And Accumulated Depreciation Carrying Amount Of Land	57,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	346,946
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	404,016
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 81,180
Real Estate And Accumulated Depreciation Year Of Construction	1964-1969
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
S. Clark Street/12th Street - 5 buildings [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 55,722
Real Estate And Accumulated Depreciation Initial Cost Of Land	63,420
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	231,267
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	78,426
Real Estate And Accumulated Depreciation Carrying Amount Of Land	63,291
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	309,822
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	373,113
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 101,024
Real Estate And Accumulated Depreciation Year Of Construction	1981, 1983-1987
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
S. Clark Street/12th Street - 5 buildings [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Number Of Real Estate Properties | Properties	5
1550-1750 Crystal Drive 241-251 18th Street - 4 buildings [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 38,707
Real Estate And Accumulated Depreciation Initial Cost Of Land	64,817
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	218,330
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	79,201
Real Estate And Accumulated Depreciation Carrying Amount Of Land	64,652
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	297,696
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	362,348
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 101,272
Real Estate And Accumulated Depreciation Year Of Construction	1974-1980
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
1550-1750 Crystal Drive 241-251 18th Street - 4 buildings [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Number Of Real Estate Properties | Properties	4
RiverHouse Apartments [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 307,710
Real Estate And Accumulated Depreciation Initial Cost Of Land	118,421
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	125,078
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	73,611
Real Estate And Accumulated Depreciation Carrying Amount Of Land	138,854
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	178,256
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	317,110
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 40,965
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
Met Park / Warehouses [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	106,946
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,326
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	186,466
Real Estate And Accumulated Depreciation Carrying Amount Of Land	124,585
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	170,153
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	294,738
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 67
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
1825-1875 Connecticut Avenue NW (Universal Buildings) - 2 buildings [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 185,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	69,393
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	143,320
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	116,996
Real Estate And Accumulated Depreciation Carrying Amount Of Land	68,612
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	156,656
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	225,268
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 38,670
Real Estate And Accumulated Depreciation Year Of Construction	1956, 1963
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
Number Of Real Estate Properties | Properties	2
West End 25 [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 101,671
Real Estate And Accumulated Depreciation Initial Cost Of Land	67,049
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,039
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	106,814
Real Estate And Accumulated Depreciation Carrying Amount Of Land	68,198
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	110,704
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	178,902
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 17,389
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
2101 L Street NW [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 146,222
Real Estate And Accumulated Depreciation Initial Cost Of Land	32,815
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	51,642
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	84,372
Real Estate And Accumulated Depreciation Carrying Amount Of Land	39,768
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	129,061
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	168,829
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 35,595
Real Estate And Accumulated Depreciation Year Of Construction	1,975
Real Estate And Accumulated Depreciation Year Of Acquisition	2,003
2200-2300 Clarendon Blvd (Courthouse Plaza) - 2 buildings [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 23,250
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	105,475
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	49,165
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	154,640
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	154,640
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 56,063
Real Estate And Accumulated Depreciation Year Of Construction	1988-1989
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
Number Of Real Estate Properties | Properties	2
1800, 1851 And 1901 South Bell Street - 3 buildings [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	37,551
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	118,806
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(4,269)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	37,551
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	114,537
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	152,088
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 35,454
Real Estate And Accumulated Depreciation Year Of Construction	1,968
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
Number Of Real Estate Properties | Properties	3
875 15th Street, NW (Bowen Building) [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 115,022
Real Estate And Accumulated Depreciation Initial Cost Of Land	30,077
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	98,962
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,835
Real Estate And Accumulated Depreciation Carrying Amount Of Land	30,176
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	101,698
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	131,874
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 26,980
Real Estate And Accumulated Depreciation Year Of Construction	2,004
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
1399 New York Avenue NW [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	33,481
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	67,363
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	7,047
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,178
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	73,713
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	107,891
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 10,138
Real Estate And Accumulated Depreciation Year Of Acquisition	2,011
Commerce Executive - 3 buildings [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,401
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	58,705
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	25,080
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,140
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	84,046
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	97,186
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 29,088
Real Estate And Accumulated Depreciation Year Of Construction	1985-1989
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
Number Of Real Estate Properties | Properties	3
H Street - North 10-1D Land Parcel [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	104,473
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	55
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(33,069)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	61,970
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,489
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	71,459
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
Crystal City Hotel [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	47,191
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10,888
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	58,079
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	66,079
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 16,263
Real Estate And Accumulated Depreciation Year Of Construction	1,968
Real Estate And Accumulated Depreciation Year Of Acquisition	2,004
1150 17th Street, NW [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 28,728
Real Estate And Accumulated Depreciation Initial Cost Of Land	23,359
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	24,876
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	14,388
Real Estate And Accumulated Depreciation Carrying Amount Of Land	24,723
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	37,900
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	62,623
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 31,700
Real Estate And Accumulated Depreciation Year Of Construction	1,970
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
Democracy Plaza One [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	33,628
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	6,103
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	39,731
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	39,731
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 18,189
Real Estate And Accumulated Depreciation Year Of Construction	1,987
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
1730 M Street, NW [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 14,853
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,095
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	17,541
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	11,863
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,687
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	28,812
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	39,499
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 11,086
Real Estate And Accumulated Depreciation Year Of Construction	1,963
Real Estate And Accumulated Depreciation Year Of Acquisition	2,002
1726 M Street, NW [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	9,450
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	22,062
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,433
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,455
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	25,490
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	34,945
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 21,502
Real Estate And Accumulated Depreciation Year Of Construction	1,964
Real Estate And Accumulated Depreciation Year Of Acquisition	2,006
Crystal Drive Retail [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,465
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	7,294
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	27,759
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	27,759
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 11,493
Real Estate And Accumulated Depreciation Year Of Construction	2,004
Real Estate And Accumulated Depreciation Year Of Acquisition	2,004
1109 South Capitol Street [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,541
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	178
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(253)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,597
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	(131)
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,466
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
South Capitol [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,009
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,273
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(1,920)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,362
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,362
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
Other Property [Member] | Washington DC Segment [Member] | Washington DC [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,763
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	52,408
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(27,100)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,763
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	25,308
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	27,071
Real Estate And Accumulated Depreciation Accumulated Depreciation	705
theMart, Chicago [Member] | Other Segment [Member] | Illinois [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	550,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	64,528
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	319,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	307,313
Real Estate And Accumulated Depreciation Carrying Amount Of Land	64,535
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	626,452
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	690,987
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 232,480
Real Estate And Accumulated Depreciation Year Of Construction	1,930
Real Estate And Accumulated Depreciation Year Of Acquisition	1,998
527 West Kinzie, Chicago [Member] | Other Segment [Member] | Illinois [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,166
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	25
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,166
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	25
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,191
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
MMPI Piers [Member] | Other Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	13,840
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,840
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	13,840
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 1,426
Real Estate And Accumulated Depreciation Year Of Acquisition	2,008
Total The Mart [Member] | Other Segment [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 550,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	69,694
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	319,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	321,178
Real Estate And Accumulated Depreciation Carrying Amount Of Land	69,701
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	640,317
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	710,018
Real Estate And Accumulated Depreciation Accumulated Depreciation	233,906
555 California Street [Member] | Other Segment [Member] | California [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	589,063
Real Estate And Accumulated Depreciation Initial Cost Of Land	221,903
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	893,324
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	91,882
Real Estate And Accumulated Depreciation Carrying Amount Of Land	221,903
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	985,206
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,207,109
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 217,490
Real Estate And Accumulated Depreciation Year Of Construction	1922/1969/1970
Real Estate And Accumulated Depreciation Year Of Acquisition	2,007
220 Central Park South [Member] | Other Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 950,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	115,720
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	16,420
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	654,912
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	787,052
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	787,052
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
Borgata Land, Atlantic City, NJ [Member] | Other Segment [Member] | New Jersey [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 57,549
Real Estate And Accumulated Depreciation Initial Cost Of Land	83,089
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	83,089
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	83,089
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 0
Real Estate And Accumulated Depreciation Year Of Acquisition	2,010
Wayne Town Center [Member] | Other Segment [Member] | New Jersey [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,137
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	42,628
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	68,765
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	68,765
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 8,254
Real Estate And Accumulated Depreciation Year Of Acquisition	2,010
40 East 66th Residential [Member] | Other Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	29,199
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	85,798
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(93,222)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,454
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,321
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	21,775
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,142
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
Annapolis [Member] | Other Segment [Member] | Maryland [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,207
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
677-679 Madison [Member] | Other Segment [Member] | New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,462
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,058
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	284
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,626
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,178
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,804
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 361
Real Estate And Accumulated Depreciation Year Of Acquisition	2,006
Other [Member] | Other Segment [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,270
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,270
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,270
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 785
Real Estate And Accumulated Depreciation Year Of Acquisition	2,005
Leasehold Improvements Equipment and Other [Member] | Other Segment [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	116,030
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	116,030
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	116,030
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 85,863

SEC Schedule III Rollforward of

SEC Schedule III Rollforward of Real Estate Assets and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Real estate, Balance at beginning period	$ 16,822,358	$ 15,392,968	$ 15,287,078
Gross real estate balance at year end	18,391,542	16,966,657	16,433,600
Less: Assets sold and written-off	301,405	144,299	1,040,632
Real estate, Balance at end of period	18,090,137	16,822,358	15,392,968
Reconciliation Of Real Estate Accumulated Depreciation Roll Forward
Accumulated Depreciation, Balance at beginning of period	3,161,633	2,829,862	2,524,718
Additions charged to operating expenses	459,612	461,689	423,844
Real Estate Accumulated Depreciation	3,621,245	3,291,551	2,948,562
Less: Accumulated depreciation on assets sold and written-off	202,978	129,918	118,700
Accumulated Depreciation, Balance at end of period	3,418,267	3,161,633	2,829,862
Land [Member]
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Additions during the period: Land	281,048	225,536	131,646
Building Improvements [Member]
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Additions during the period: Buildings & improvements	$ 1,288,136	$ 1,348,153	$ 1,014,876