Vornado Realty (VNOD) 8-K 20 May 15 2014 FY Other Events Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	VORNADO REALTY LP
Entity Central Index Key	1040765
Document Type	8-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	0
Entity Public Float		$0
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Real estate, at cost:
Land	$3,861,913	$3,644,181
Buildings and improvements	11,705,749	10,601,162
Development costs and construction in progress	1,128,037	1,019,337
Leasehold improvements and equipment	126,659	128,288
Total	16,822,358	15,392,968
Less accumulated depreciation and amortization	-3,161,633	-2,829,862
Real estate, net	13,660,725	12,563,106
Cash and cash equivalents	1,198,477	583,290
Restricted cash	176,204	251,208
Marketable securities	206,323	191,917
Tenant and other receivables, net of allowance for doubtful accounts of $12,210 and $14,519	109,998	108,194
Investments in partially owned entities	1,246,496	1,249,667
Real Estate Fund investments	513,973	667,710
Receivable arising from the straight-lining of rents, net of allowance of $3,188 and $4,355	787,271	707,200
Deferred leasing and financing costs, net of accumulated amortization of $281,109 and $242,068	475,158	375,567
Identified intangible assets, net of accumulated amortization of $199,821 and $252,121	225,155	253,082
Assets related to discontinued operations	2,238,474	2,636,080
Other assets	410,066	510,203
Assets	21,248,320	20,097,224
LIABILITIES, REDEEMABLE PARTNERSHIP UNITS AND EQUITY
Mortgages payable	8,263,165	7,131,231
Senior unsecured notes	1,347,159	1,350,855
Revolving credit facility debt	0	295,870
Accounts payable and accrued expenses	447,745	373,857
Deferred revenue	358,613	359,430
Deferred compensation plan	117,284	116,515
Liabilities related to discontinued operations	1,511,362	1,441,853
Other liabilities	375,830	429,249
Total liabilities	12,421,158	11,498,860
Commitments and contingencies
Redeemable partnership units:
Class A units - 11,365,550 and 11,292,038 units outstanding	1,336,780	1,002,620
Series D cumulative redeemable preferred units - 1 unit outstanding	1,000	1,000
Total redeemable partnership units	1,337,780	1,003,620
Equity:
Partners' capital	8,157,544	8,428,534
Earnings less than distributions	-1,505,385	-1,734,839
Accumulated other comprehensive income	93,267	71,537
Total Vornado Realty L.P. equity	6,745,426	6,765,232
Noncontrolling interests in consolidated subsidiaries	743,956	829,512
Total equity	7,489,382	7,594,744
Total liabilities, redeemable partnership units and equity	21,248,320	20,097,224
Toys R Us [Member]
Real estate, at cost:
Investments in partially owned entities	0	83,224
All Equity Method Investees Excluding Toys [Member]
Real estate, at cost:
Investments in partially owned entities	$1,246,496	$1,166,443

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
ASSETS
Tenant and other receivables, allowance for doubtful accounts (in US dollars)	$12,210	$14,519
Receivable arising from the straight-lining of rents, allowance (in US dollars)	3,188	4,355
Deferred leasing and financing costs, accumulated amortization (in US dollars)	281,109	242,068
Identified intangible assets, accumulated amortization (in US dollars)	$199,821	$252,121
Capital Unit, Class A [Member]
LIABILITIES, REDEEMABLE PARTNERSHIP UNITS AND EQUITY
Outstanding Partnership Units held by Third Parties (in units)	11,356,550	11,292,038
Cumulative Redeemable Preferred Unit [Member]
LIABILITIES, REDEEMABLE PARTNERSHIP UNITS AND EQUITY
Outstanding Partnership Units held by Third Parties (in units)	1	1

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
REVENUES:
Property rentals	$1,911,487	$1,880,405	$1,771,264
Tenant expense reimbursements	245,819	226,831	207,149
Cleveland Medical Mart development project	0	36,369	235,234
Fee and other income	155,206	155,571	119,077
Total revenues	2,312,512	2,299,176	2,332,724
EXPENSES:
Operating	953,611	928,565	891,637
Depreciation and amortization	481,303	461,627	435,545
General and administrative	169,270	177,366	167,194
Cleveland Medical Mart development project	0	32,210	226,619
Acquisition and transaction related costs, and impairment losses	18,435	24,857	17,386
Total expenses	1,622,619	1,624,625	1,738,381
Operating income	689,893	674,551	594,343
Income from Real Estate Fund	163,034	102,898	63,936
(Loss) income from partially owned entities	-58,131	-338,785	423,126
Interest and debt expense	-412,755	-425,782	-431,235
Interest and other investment income (loss), net	38,752	-24,887	-261,200
Net gain on disposition of wholly owned and partially owned assets	13,568	2,030	4,856
Income (loss) before income taxes	434,361	-9,975	393,826
Income tax (expense) benefit	-9,281	8,717	-8,132
Income (loss) from continuing operations	425,080	-1,258	385,694
Income from discontinued operations	583,946	565,998	308,847
Net income	1,009,026	564,740	694,541
Less net income attributable to noncontrolling interests in consolidated subsidiaries	-96,561	-63,952	-32,018
Net income attributable to Vornado Realty L.P.	912,465	500,788	662,523
Preferred unit distributions	-81,514	-83,965	-86,873
Preferred unit redemptions	0	-1,130	8,948
NET INCOME attributable to Class A unitholders	830,951	415,693	584,598
INCOME (LOSS) PER CLASS A UNIT - BASIC:
Income (loss) from continuing operations, net (in dollars per unit)	$1.22	($0.76)	$1.37
Income from discontinued operations, net (in dollars per unit)	$2.95	$2.85	$1.58
Net income per Class A unit (in dollars per unit)	$4.17	$2.09	$2.95
Weighted average units outstanding (in shares)	198,213	197,551	197,082
INCOME (LOSS) PER CLASS A UNIT - DILUTED:
Income (loss) from continuing operations, net (in dollars per unit)	$1.22	($0.75)	$1.36
Income from discontinued operations, net (in dollars per unit)	$2.92	$2.83	$1.57
Net income per Class A unit (in dollars per unit)	$4.14	$2.08	$2.93
Weighted average units outstanding (in shares)	199,813	198,643	198,134
Toys R Us [Member]
EXPENSES:
(Loss) income from partially owned entities	-73,556	-362,377	14,859
All Equity Method Investees Excluding Toys [Member]
EXPENSES:
(Loss) income from partially owned entities	$15,425	$23,592	$408,267

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income	$1,009,026	$564,740	$694,541
Other comprehensive income (loss):
Change in unrealized net gain (loss) on securities available-for-sale	14,465	142,281	-283,649
Amounts reclassified from accumulated other comprehensive income:
Non-cash impairment loss on J.C. Penney common shares	0	0	224,937
Sale of available-for-sale securities	0	-42,404	-3,582
Pro rata share of other comprehensive income (loss) of nonconsolidated subsidiaries	2,509	-22,814	-31,758
Change in value of interest rate swap	6,079	18,183	-5,659
Other	0	533	329
Comprehensive income	1,032,079	660,519	595,159
Less comprehensive income attributable to noncontrolling interests in consolidated subsidiaries	-96,561	-63,952	-32,018
Comprehensive income attributable to Vornado Realty L.P.	$935,518	$596,567	$563,141

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (USD $)	Total	Series L Preferred Stock [Member]	Series K Preferred Stock [Member]	Series E Preferred Stock [Member]	Series F And Series H Preferred Stock [Member]	Real Estate Fund [Member]	All Other Except Real Estate Fund [Member]	Preferred Shares	Preferred Shares	Preferred Shares	Preferred Shares	Preferred Shares	Class A Units Owned By Vornado	Earnings Less Than Distributions	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests	Non-controlling Interests	Non-controlling Interests
In Thousands, unless otherwise specified									Series L Preferred Stock [Member]	Series K Preferred Stock [Member]	Series E Preferred Stock [Member]	Series F And Series H Preferred Stock [Member]					Real Estate Fund [Member]	All Other Except Real Estate Fund [Member]
Beginning balance, Value at Dec. 31, 2011	$7,508,447							$1,021,660					$7,134,631	($1,401,704)	$73,729	$680,131
Beginning balance, Units at Dec. 31, 2011								42,187					185,080
Net income attributable to Vornado Realty L.P.	662,523													662,523
Net income attributable to noncontrolling interests in consolidated subsidiaries in consolidated subsidiaries	32,018					39,332										32,018
Net income attributable to redeemable partnership units	-45,263													-45,263
Distributions to Vornado	-699,318													-699,318
Distributions to preferred unitholders	-76,937													-76,937
Issuance of preferred units, Units										12,000
Issuance of preferred units, Value			290,971							290,971
Redemption of preferred units, Units											-3,000
Redemption of preferred units, Value				-72,248							-72,248
Class A units issued to Vornado:
Upon redemption of Class A units, at redemption value, Units													1,121
Upon redemption of Class A units, at redemption value, Value	89,762												89,762
Under Vornado's Omnibus share plan, Units													434
Under Vornado's Omnibus share plan, Value	-6,850												9,539	-16,389
Under Vornado's dividend reinvestment plan, Units													29
Under Vornado's dividend reinvestment plan, Value	2,307												2,307
Upon acquisition of real estate, Units													64
Upon acquisition of real estate, Value	5,124												5,124
Contributions:
Contributions						195,029	18,103										195,029	18,103
Distribution:
Distributions						-48,138	-59										-48,138	-59
Transfer of noncontrolling interest in Real Estate Fund	0
Conversion of Series A preferred units to Class A units, Units								-2					3
Conversion of Series A preferred units to Class A units, Value	0							-105					105
Deferred compensation units and options, Units													4
Deferred compensation units and options, Value	13,054												13,527	-473
Change in unrealized net gain (loss) on securities available-for-sale	-283,649														-283,649
Non-cash impairment loss on J.C. Penney common shares	224,937														224,937
Amounts reclassified related to sale of available-for-sale securities	-3,582														-3,582
Pro rata share of other comprehensive income (loss) of nonconsolidated subsidiaries	-31,758														-31,758
Change in value of interest rate swap	-5,659														-5,659
Adjustments to carry redeemable Class A units at redemption value	-52,117												-52,117
Redeemable noncontrolling interests' share of above adjustments	6,707														6,707
Preferred unit redemptions	8,948													8,948
Consolidation of a partially owned entity	176,132															176,132
Other	-4,340							0						-4,662	329	-7
Ending balance, Value at Dec. 31, 2012	7,904,144							1,240,278					7,202,878	-1,573,275	-18,946	1,053,209
Ending balance, Units at Dec. 31, 2012								51,185					186,735
Net income attributable to Vornado Realty L.P.	500,788													500,788
Net income attributable to noncontrolling interests in consolidated subsidiaries in consolidated subsidiaries	63,952					53,427										63,952
Net income attributable to redeemable partnership units	-24,817													-24,817
Distributions to Vornado	-545,913													-545,913
Distributions to preferred unitholders	-82,807													-82,807
Issuance of preferred units, Units									12,000
Issuance of preferred units, Value		290,306							290,306
Redemption of preferred units, Units												-10,500
Redemption of preferred units, Value					-253,269							-253,269
Class A units issued to Vornado:
Upon redemption of Class A units, at redemption value, Units													299
Upon redemption of Class A units, at redemption value, Value	25,317												25,317
Under Vornado's Omnibus share plan, Units													104
Under Vornado's Omnibus share plan, Value	5,808												5,915	-107
Under Vornado's dividend reinvestment plan, Units													22
Under Vornado's dividend reinvestment plan, Value	1,851												1,851
Upon acquisition of real estate, Units													128
Upon acquisition of real estate, Value	11,461												11,461
Contributions:
Contributions						28,078	15,886										28,078	15,886
Distribution:
Distributions	-34,053					-47,268	-133,153										-47,268	-133,153
Transfer of noncontrolling interest in Real Estate Fund	0
Conversion of Series A preferred units to Class A units, Units								-2					3
Conversion of Series A preferred units to Class A units, Value	0							-90					90
Deferred compensation units and options, Units													-6
Deferred compensation units and options, Value	9,270												9,577	-307
Change in unrealized net gain (loss) on securities available-for-sale	142,281														142,281
Non-cash impairment loss on J.C. Penney common shares	0
Amounts reclassified related to sale of available-for-sale securities	-42,404														-42,404
Pro rata share of other comprehensive income (loss) of nonconsolidated subsidiaries	-22,814														-22,814
Change in value of interest rate swap	18,183														18,183
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 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, Value at Dec. 31, 2013	7,594,744							1,277,225					7,151,309	-1,734,839	71,537	829,512
Ending balance, Units at Dec. 31, 2013								52,683					187,285
Net income attributable to Vornado Realty L.P.	912,465													912,465
Net income attributable to noncontrolling interests in consolidated subsidiaries in consolidated subsidiaries	96,561					92,728										96,561
Net income attributable to redeemable partnership units	-47,613													-47,613
Distributions to Vornado	-547,831													-547,831
Distributions to preferred unitholders	-81,464													-81,464
Class A units issued to Vornado:
Upon redemption of Class A units, at redemption value, Units													271
Upon redemption of Class A units, at redemption value, Value	27,273												27,273
Under Vornado's Omnibus share plan, Units													304
Under Vornado's Omnibus share plan, Value	14,047												17,440	-3,393
Under Vornado's dividend reinvestment plan, Units													17
Under Vornado's dividend reinvestment plan, Value	1,804												1,804	0
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 units to Class A units, Units								-4					5
Conversion of Series A preferred units to Class A units, Value	0							-193					193
Deferred compensation units and options, Units													5
Deferred compensation units and options, Value	5,512												5,852	-340
Change in unrealized net gain (loss) on securities available-for-sale	14,465														14,465
Non-cash impairment loss on J.C. Penney common shares	0
Amounts reclassified related to sale of available-for-sale securities	0
Pro rata share of other comprehensive income (loss) of nonconsolidated subsidiaries	2,509														2,509
Change in value of interest rate swap	6,079														6,079
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 redemptions	0
Other	-10,410							-6					-8,077	-2,370	0	43
Ending balance, Value at Dec. 31, 2014	$7,489,382							$1,277,026					$6,880,518	($1,505,385)	$93,267	$743,956
Ending balance, Units at Dec. 31, 2014								52,679					187,887

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities:
Net income	$1,009,026	$564,740	$694,541
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	583,408	561,998	557,888
Net gains on sale of real estate	-507,192	-414,502	-245,799
Return of capital from Real Estate Fund investments	215,676	56,664	63,762
Net realized and unrealized gains on Real Estate Fund investments	-150,139	-85,771	-55,361
Distributions of income from partially owned entities	96,286	54,030	226,172
Straight-lining of rental income	-82,800	-69,391	-69,648
Equity in net loss (income) of partially owned entities, including Toys R Us	58,131	338,785	-423,126
Amortization of below-market leases, net	-46,786	-52,876	-54,359
Other non-cash adjustments	37,303	41,663	52,082
Impairment losses and tenant buy-outs	26,518	37,170	133,977
Net gain on disposition of wholly owned and partially owned assets	-13,568	-3,407	-13,347
Defeasance cost in connection with the refinancing of mortgage notes payable	5,589	0	0
Losses from the disposition of investment in J.C. Penney	0	72,974	300,752
Gain on sale of Canadian Trade Shows	0	0	-31,105
Changes in operating assets and liabilities:
Real Estate Fund investments	-3,392	-37,817	-262,537
Tenant and other receivables, net	-8,282	83,897	-23,271
Prepaid assets	-8,786	-2,207	-10,549
Other assets	-123,435	-50,856	-46,573
Accounts payable and accrued expenses	44,628	-41,729	21,595
Other liabilities	3,125	-12,576	9,955
Net cash provided by operating activities	1,135,310	1,040,789	825,049
Cash Flows from Investing Activities:
Development costs and construction in progress	-544,187	-469,417	-156,873
Additions to real estate	-279,206	-260,343	-205,652
Proceeds from sales of real estate and related investments	388,776	1,027,608	445,683
Acquisitions of real estate and other	-211,354	-193,417	-673,684
Investments in partially owned entities	-120,639	-230,300	-134,994
Restricted cash	99,464	-26,892	-75,138
Proceeds from sales and repayments of mortgage and mezzanine loans receivable and other	96,913	50,569	38,483
Investments in mortgage and mezzanine loans receivable and other	-30,175	-390	-94,094
Distributions of capital from partially owned entities	25,943	290,404	144,502
Proceeds from sales of, and return of investment in, marketable securities	0	378,709	60,258
Proceeds from the sale of LNR	0	240,474	0
Funding of J.C. Penney derivative collateral; and settlement of derivative in 2013	0	-186,079	-191,330
Return of J.C. Penney derivative collateral	0	101,150	134,950
Proceeds from the sale of Canadian Trade Shows	0	0	52,504
Proceeds from the repayment of loan to officer	0	0	13,123
Net cash (used in) provided by investing activities	-574,465	722,076	-642,262
Cash Flows from Financing Activities:
Proceeds from borrowings	2,428,285	2,262,245	3,593,000
Repayments of borrowings	-1,312,258	-3,580,100	-2,747,694
Distributions to Vornado	-547,831	-545,913	-699,318
Distributions to redeemable security holders and noncontrolling interests	-220,895	-215,247	-104,448
Purchase of marketable securities in connection with the defeasance of mortgage notes payable	-198,884	0	0
Distributions to preferred unitholders	-81,468	-83,188	-73,976
Debt issuance and other costs	-58,336	-19,883	-39,073
Contributions from noncontrolling interests in consolidated subsidiaries	30,295	43,964	213,132
Proceeds received from exercise of Vornado stock options	19,245	7,765	11,853
Repurchase of Class A units related to stock compensation agreements and related tax withholdings	-3,811	-443	-30,168
Purchases of outstanding preferred units	0	-299,400	-243,300
Proceeds from the issuance of preferred units	0	290,306	290,971
Net Cash provided by (used in) financing activities	54,342	-2,139,894	170,979
Net increase (decrease) in cash and cash equivalents	615,187	-377,029	353,766
Cash and cash equivalents at beginning of period	583,290	960,319	606,553
Cash and cash equivalents at end of period	1,198,477	583,290	960,319
Supplemental Disclosure Of Cash Flow Information:
Cash payments for interest (net of amounts capitalized of $53,139, $42,303, and $16,801	443,538	465,260	491,869
Cash payments for income taxes	11,696	9,023	21,709
Non-Cash Investing and Financing Activities:
Adjustments to carry redeemable Class A units at redemption value	-315,276	-108,252	-52,117
Marketable securities transferred in connection with the defeasance of mortgage notes payable	198,884	0	0
Defeasance of mortgage notes payable	-193,406	0	0
Write-off of fully depreciated assets	-121,673	-77,106	-177,367
Accrued capital expenditures included in accounts payable and accrued expenses	100,528	72,042	80,350
Elimination of a mortgage and mezzanine loan asset and liability	59,375	0	0
Transfer of interest in Real Estate Fund to unconsolidated joint venture	-58,564	0	0
Transfer of noncontrolling interest in Real Estate Fund	-33,028	0	0
Beverly Connection seller financing	13,620	0	0
Financing assumed in acquisitions	0	79,253	0
Financings transferred in dispositions	0	0	-163,144
L.A. Mart seller financing	0	0	35,000
Marriott Marquis Times Square - retail and signage capital lease:
Asset (included in development costs and construction in progress)	0	0	240,000
Liability (included in other liabilities)	0	0	-240,000
Increase in assets and liabilities resulting from the consolidation of partially owned entities:
Real Estate, net	0	0	342,919
Notes and mortgages payable	0	0	334,225
Decrease in assets and liabilities resulting from deconsolidation of discontinued operations and /or investments that were previously consolidated:
Real estate, Net	0	-852,166	0
Notes and Mortgages Payable	0	-322,903	0
Acquisitions [Member]
Non-Cash Investing and Financing Activities:
Like-kind exchange of real estate	606,816	66,076	230,913
Dispositions [Member]
Non-Cash Investing and Financing Activities:
Like-kind exchange of real estate	($630,352)	($128,767)	($230,913)

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parentheticals) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Cash Flows [Abstract]
Cash paid for capitalized interest	$53,139	$42,303	$16,801

Organization_and_Business

Organization and Business	12 Months Ended
	Dec. 31, 2014
Organization and Business [Abstract]
Organization And Business	1. Organization and Business
	Vornado Realty L.P. (the “Operating Partnership” and/or the “Company”) is a Delaware limited partnership. Vornado Realty Trust (“Vornado”) is the sole general partner of, and owned approximately 94.1% of the common limited partnership interest in the Operating Partnership at December 31, 2014. All references to “we,” “us,” “our,” the “Company” and “Operating Partnership” refer to Vornado Realty L.P. and its consolidated subsidiaries.
	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 million of cash to Urban Edge Properties (“UE”) (NYSE: UE). As part of this transaction, we received 5,712,000 UE operating partnership units (5.4% ownership interest). We are providing transition services to UE for an initial period of up to two years, including information technology, human resources, tax and public reporting. UE is providing us with leasing and property management services for (i) the Monmouth Mall, (ii) certain small retail properties which did not fit UE's strategy that we plan to sell, and (iii) our affiliate, Alexander's, Inc. (NYSE: ALX), Rego Park retail assets. Steven Roth, Chairman of Vornado's Board of Trustees and its 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 have been reflected in our consolidated financial statements as discontinued operations for all periods presented.
	We currently own all or portions of:
	New York:
	20.1 million square feet of Manhattan office space in 31 properties;
	2.5 million square feet of Manhattan street retail space in 56 properties;
	Four residential properties containing 1,654 units;
	The 1,700 room Hotel Pennsylvania located on Seventh Avenue at 33rd Street in the heart of the Penn Plaza district;
	A 32.4% interest in Alexander's, Inc. (NYSE: ALX), which owns six properties in the greater New York metropolitan area, including 731 Lexington Avenue, the 1.3 million square foot Bloomberg, L.P. headquarters building;
	Washington, DC:
	16.1 million square feet of office space in 59 properties;
	Seven residential properties containing 2,414 units;
	Other Real Estate and Related Investments:
	The 3.6 million square foot 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 32.6% interest in Toys “R” Us, Inc.; and
	Other real estate and related investments.

Basis_of_Presentation_and_Sign

Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
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 Realty L.P. and its consolidated subsidiaries. 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.
	The Company reclassified $37,929,000, $32,866,000 and $20,892,000 related to signage revenue from “fee and other income” to “property rentals” for the years ended December 31, 2014, 2013 and 2012, respectively.
	The Company reclassified the financial results for those retail assets that were placed into discontinued operations which primarily consisted of the 79 strip shopping centers, three malls, and a warehouse park which were spun off to UE on January 15, 2015 as  well as certain other retail assets not included in the UE spin off but were determined to be part of the strategic shift in the Company's business under the adoption of ASU 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, in the first quarter of 2015.
	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 begin after December 15, 2014. Upon adoption of this standard, individual properties sold in the ordinary course of business are not expected to qualify as discontinued operations. The financial results of our strip shopping centers and malls, which were spun off to UE on January 15, 2015, will be treated as a discontinued operation in the first quarter of 2015.
	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, 2016. 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.
	2. Basis of Presentation and Significant Accounting Policies - continued
	Significant Accounting Policies
	Real Estate: Real estate is carried at cost, net of accumulated depreciation and amortization. Betterments, major renewals and certain costs directly related to the improvement and leasing of real estate are capitalized. Maintenance and repairs are expensed as incurred. For redevelopment of existing operating properties, the net book value of the existing property under redevelopment plus the cost for the construction and improvements incurred in connection with the redevelopment are capitalized to the extent the capitalized costs of the property do not exceed the estimated fair value of the redeveloped property when complete. If the cost of the redeveloped property, including the 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 $62,786,000 and $42,303,000 for the years ended December 31, 2014 and 2013, respectively.
	Upon the acquisition of real estate, we assess the fair value of acquired assets (including land, buildings and improvements, identified intangibles, such as acquired above and below-market leases, 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 indicate that the carrying amount may not be recoverable. An impairment exists when the carrying amount of an asset exceeds the aggregate projected future cash flows over the anticipated holding period on an undiscounted basis. An impairment loss is measured based on the excess of the property's carrying amount over its estimated fair value. Impairment analyses are based on our current plans, intended holding periods and available market information at the time the analyses are prepared. If our estimates of the projected future cash flows, anticipated holding periods, or market conditions change, our evaluation of impairment losses may be different and such differences could be material to our consolidated financial statements. The evaluation of anticipated cash flows is subjective and is based, in part, on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results. Plans to hold properties over longer periods decrease the likelihood of recording impairment losses.
	The table below summarizes impairment losses and acquisition related costs in the years ended December 31, 2014, 2013 and 2012.
		(Amounts in thousands)			For the Year Ended December 31,
					2014		2013			2012
		Impairment losses		$	-	$	-		$	6,138
		Acquisition related costs			18,435		24,857	(1)		11,248
				$	18,435	$	24,857		$	17,386
		-1	Includes a $10,949 prepayment penalty in connection with the repayment of the mortgage loan upon the acquisition of 655 Fifth Avenue.
	2. Basis of Presentation and Significant Accounting Policies – continued
	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 secured 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 accounted for on the cost method.
	Investments in partially owned entities are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment loss is measured based on the excess of the carrying amount of an investment over its estimated fair value. Impairment analyses are based on current plans, intended holding periods and available information at the time the analyses are prepared. In the years ended December 31, 2014, 2013 and 2012, we recognized non-cash impairment losses on investments in partially owned entities, aggregating $85,459,000, $281,098,000 and $44,936,000, respectively. Included in these amounts are $75,196,000, $240,757,000 and $40,000,000 of impairment losses related to our investment in Toys in 2014, 2013 and 2012, respectively.
	Mortgage and Mezzanine Loans Receivable: We invest in mortgage and mezzanine loans of entities that have significant real estate assets. These investments are either secured by the real property or by pledges of the equity interests of the entities owning the underlying real estate. We record these investments at the stated principal amount net of any unamortized discount or premium. We accrete or amortize any discount or premium over the life of the related receivable utilizing the effective interest method or straight-line method, if the result is not materially different. We evaluate the collectibility of both interest and principal of each of our loans whenever events or changes in circumstances indicate such amounts may not be recoverable. A loan is impaired when it is probable that we will be unable to collect all amounts due according to the existing contractual terms. When a loan is impaired, the amount of the loss accrual is calculated by comparing the carrying amount of the investment to the present value of expected future cash flows discounted at the loan's effective interest rate, or as a practical expedient, to the value of the collateral if the loan is collateral dependent. Interest on impaired loans is recognized when received in cash. Mortgage and mezzanine loans receivable are included in “other assets” on our consolidated balance sheets.
	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 Deposits placed through an Account Registry Service (“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 purposes 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.
	2. Basis of Presentation and Significant Accounting Policies – continued
	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, 2014 and 2013, we had $12,210,000 and $14,519,000, respectively, in allowances for doubtful accounts. In addition, as of December 31, 2014 and 2013, we had $3,188,000 and $4,355,000, 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 sales exceeding defined thresholds. These rents are recognized only after the contingency has been removed (i.e., when tenant sales thresholds have been achieved).
	•       Hotel Revenue — income arising from the operation of the Hotel Pennsylvania which consists of rooms revenue, food and beverage revenue, and banquet revenue. Income is recognized when rooms are occupied. Food and beverage and banquet revenue is recognized when the services have been rendered.
	•       Trade Shows Revenue — income arising from the operation of trade shows, including rentals of booths. This revenue is recognized when the trade shows have occurred.
	•       Expense Reimbursements — revenue arising from tenant leases which provide for the recovery of all or a portion of the operating expenses and real estate taxes of the respective property. This revenue is accrued in the same periods as the expenses are incurred.
	•       Management, Leasing and Other Fees — income arising from contractual agreements with third parties or with partially owned entities. This revenue is recognized as the related services are performed under the respective agreements.
	•       Cleveland Medical Mart — revenue arising from the development of the Cleveland Medical Mart. This revenue was recognized as the related services were performed under the respective agreements using the criteria set forth in ASC 605-25, Multiple Element Arrangements
	2. Basis of Presentation and Significant Accounting Policies – continued
	Derivative Instruments and Hedging Activities: ASC 815, Derivatives and Hedging, as amended, establishes accounting and reporting standards for derivative instruments, including certain derivative instruments embedded in other contracts, and for hedging activities. As of December 31, 2014 and 2013, our derivative instruments consisted of an interest rate cap and an interest rate swap. 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: As a limited partnership, our partners are required to report their respective share of taxable income on their individual tax returns. The provision for income taxes in our consolidated financial statements relate to certain 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 $10,777,000, $9,608,000 and $20,336,000 for the years ended December 31, 2014, 2013 and 2012, respectively, and have immaterial differences between the financial reporting and tax basis of assets and liabilities.
	At December 31, 2014 and 2013, we had deferred tax assets from our taxable REIT subsidiaries of $94,100,000 and $87,800,000, respectively, against which we have recorded a full valuation allowance because we have not determined that it is more likely than not that we will realize these net operating loss carryforwards which expire in 2034. The year over year change in the valuation allowance relates to an increase in the net operating loss carryforwards.

Vornado_Capital_Partners_Real_

Vornado Capital Partners Real Estate Fund (the "Fund")	12 Months Ended
	Dec. 31, 2014
Real Estate Fund [Abstract]
Vornado Capital Partners Real Estate Fund (the "Fund")	3. Vornado Capital Partners Real Estate Fund (the “Fund”)
	We are the general partner and investment manager of 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 the AICPA Investment Company Guide 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 (see Note 6 - Investments in Partially Owned Entities - One Park Avenue). 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, 2015, 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 purchase price for the 57% interest was approximately $95,000,000 (our share $39,000,000) which valued the property at approximately $480,000,000. The property is encumbered by a newly placed $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%.
	At December 31, 2014, the Fund had seven investments with an aggregate fair value of $513,973,000, or $176,899,000 in excess of cost, and had remaining unfunded commitments of $144,123,000, of which our share was $36,031,000. At December 31, 2013, the Fund had nine investments with an aggregate fair value of $667,710,000.
	Below is a summary of income from the Fund for the years ended December 31, 2014, 2013 and 2012:
	(Amounts in thousands)		For the Year Ended December 31,
			2014		2013		2012
	Net investment income		$	12,895	$	8,943	$	8,575
	Net realized gains			76,337		8,184		-
	Net unrealized gains			73,802		85,771		55,361
	Income from Real Estate Fund			163,034		102,898		63,936
	Less income attributable to noncontrolling interests			-92,728		-53,427		-39,332
	Income from Real Estate Fund attributable to Vornado Realty L.P. (1)		$	70,306	$	49,471	$	24,604
	-1	Excludes $2,865, $2,992, and $3,278 of management and leasing fees in the years ended December 31, 2014, 2013 and 2012, 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, 2014
Business Combinations [Abstract]
Acquisitions	4. Acquisitions
	On August 1, 2014, we acquired the land under our 715 Lexington Avenue retail property located on the Southeast corner of 58th Street and Lexington Avenue in Manhattan, for $63,000,000.
	On October 28, 2014, we completed the purchase of the retail condominium of the St. Regis Hotel for $700,000,000. We own a 74.3% controlling interest of the joint venture which owns the property. The acquisition was used in a like-kind exchange for income tax purposes for the sale of 1740 Broadway (see Note 8 – Dispositions). We consolidate the accounts of the venture into our consolidated financial statements from the date of acquisition.
	On November 21, 2014, we entered into an agreement to acquire the Center Building, an eight story 437,000 square foot office building, located at 33-00 Northern Boulevard in Long Island City, New York. The building is 98% leased. The purchase price is approximately $142,000,000, including the assumption of an existing $62,000,000 4.43% mortgage maturing in October 2018. The purchase is expected to close in the first quarter of 2015, subject to customary closing conditions. As of December 31, 2014, our $14,200,000 non-refundable deposit was included in “other assets” on our consolidated balance sheet.
	On January 20, 2015, we co-invested with our 25% owned Fund and one of the Fund's limited partners to acquire the Fund's joint venture partner's 57% interest in the Crowne Plaza Times Square Hotel (see Note 3 – Vornado Capital Partners Real Estate Fund).

Marketable_Securities_and_Deri

Marketable Securities and Derivative Instruments	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Marketable Securities [Abstract]
Derivative Instrument and Marketable Securities	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 gains and losses resulting from the mark-to-market of these securities are included in “other comprehensive income (loss).” Realized gains and losses are recognized in earnings only upon the sale of the securities and are recorded based on the weighted average cost of such securities.
	We evaluate our portfolio of marketable securities for impairment each reporting period. For each of the securities in our portfolio with unrealized losses, we review the underlying cause of the decline in value and the estimated recovery period, as well as the severity and duration of the decline. In our evaluation, we consider our ability and intent to hold these investments for a reasonable period of time sufficient for us to recover our cost basis. We also evaluate the near-term prospects for each of these investments in relation to the severity and duration of the decline.
		Below is a summary of our marketable securities portfolio as of December 31, 2014 and 2013.
			As of December 31, 2014						As of December 31, 2013
					GAAP		Unrealized				GAAP		Unrealized
			Fair Value		Cost		Gain		Fair Value		Cost		Gain
	Equity securities:
		Lexington Realty Trust	$	202,789	$	72,549	$	130,240	$	188,567	$	72,549	$	116,018
		Other		3,534		-		3,534		3,350		59		3,291
			$	206,323	$	72,549	$	133,774	$	191,917	$	72,608	$	119,309
	Investment in Lexington Realty Trust (“Lexington”) (NYSE: LXP)
	From the inception of our investment in Lexington in 2008, until the first quarter of 2013, we accounted for our investment under the equity method because of our ability to exercise significant influence over Lexington's operating and financial policies. As a result of Lexington's common share issuances, our ownership interest was reduced over time from approximately 17.2% to 8.8% at March 31, 2013. In the first quarter of 2013, we concluded that we no longer have the ability to exercise significant influence over Lexington's operating and financial policies, and began accounting for this investment as a marketable equity security – available for sale, in accordance with ASC Topic 320, Investments – Debt and Equity Securities.
	Investment in J.C. Penney Company, Inc. (“J.C. Penney”) (NYSE: JCP)
	In the first quarter of 2013, we wrote down 8,584,010 J.C. Penney common shares we owned to fair value, based on J.C. Penney's March 31, 2013 closing share price of $15.11 per share, and recorded a $39,487,000 impairment loss. On September 19, 2013, we settled a forward contract and received 4,815,990 J.C. Penney common shares. In connection therewith, we recognized a $33,487,000 loss from the mark-to-market of the derivative position through its settlement date. These losses are included in “interest and other investment income (loss), net” on our consolidated statements of income.
	In March 2013 and September 2013, we sold an aggregate of 23,400,000 J.C. Penney common shares at a price of $14.29 per share, or $334,500,000, resulting in a net loss of $54,914,000. The net losses resulting from these sales are included in “net gain on disposition of wholly owned and partially owned assets” on our consolidated statements of income.
	Other Investments
	During 2013 and 2012, we sold other marketable securities for aggregate proceeds of $44,209,000 and $58,718,000, respectively, resulting in net gains of $31,741,000 and $3,582,000, respectively, which are included as a component of “net gain on disposition of wholly owned and partially owned assets” on our consolidated statements of income.

Investments_in_Partially_Owned

Investments in Partially Owned Entities	12 Months Ended
	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Investments in Partially Owned Entities	6. Investments in Partially Owned Entities
	Toys “R” Us (“Toys”)
	As of December 31, 2014, we own 32.6% 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 fiscal year ends on December 31. The business of Toys is highly seasonal and substantially all of Toys' net income is generated in its fourth 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 2013, we recognized our share of Toys' fourth quarter net income of $78,542,000 and a corresponding non-cash impairment loss of the same amount to continue to carry our investment at fair value.
	At December 31, 2013, we estimated that the fair value of our investment in Toys was approximately $80,062,000 ($83,224,000 including $3,162,000 for our share of Toys' accumulated other comprehensive income), or $162,215,000 less than the carrying amount after recognizing our share of Toys' third quarter net loss in our fourth quarter. In determining the fair value of our investment, we considered, among other inputs, a December 31, 2013 third-party valuation of Toys. As of December 31, 2013, we have concluded that the decline in the value of our investment was “other-than-temporary” based on, among other factors, Toys' 2013 holiday sales results, compression of earnings multiples of comparable retailers and our inability to forecast a recovery in the near term. Accordingly, we recognized an additional non-cash impairment loss of $162,215,000 in the fourth quarter of 2013.
	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 to continue to carry our investment at fair value.
	Below is a summary of Toys' latest available financial information on a purchase accounting basis:
		(Amounts in thousands)						Balance as of
		Balance Sheet:						1-Nov-14			2-Nov-13
			Assets					$	11,267,000		$	11,756,000
			Liabilities						10,377,000			10,437,000
			Noncontrolling interests						82,000			75,000
			Toys “R” Us, Inc. equity (1)						808,000			1,244,000
					For the Twelve Months Ended
		Income Statement:			1-Nov-14			2-Nov-13			27-Oct-12
			Total revenues		$	12,645,000		$	13,046,000		$	13,698,000
			Net (loss) income attributable to Toys			-343,000			-396,000			138,000
		-1		At December 31, 2014, the carrying amount of our investment in Toys is less than our share of Toys' equity by approximately $263,455. This basis difference results primarily from non-cash impairment losses aggregating $355,953 that we have recognized through December 31, 2014. We have allocated the basis difference primarily to Toys' real estate, which is being amortized over its remaining estimated useful life.
	Alexander's, Inc. (“Alexander's”) (NYSE: ALX)
	As of December 31, 2014, 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 and are automatically renewable.
	6. Investments in Partially Owned Entities – continued
	Alexander's, Inc. (“Alexander's”) (NYSE: ALX) - continued
	As of December 31, 2014 the market value (“fair value” pursuant to ASC 820) of our investment in Alexander's, based on Alexander's December 31, 2014 closing share price of $437.18, was $723,125,000, or $591,509,000 in excess of the carrying amount on our consolidated balance sheet. As of December 31, 2014, 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 $42,048,000. 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
	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) $280,000, 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. The total of these amounts was payable to us in annual installments in an amount not to exceed $4,000,000 with interest on the unpaid balance at one-year LIBOR plus 1.0% (1.58% at December 31, 2014).
	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, for an annual fee of the costs for such services plus 6%. During the years ended December 31, 2014, 2013 and 2012, we recognized $2,318,000, $2,036,000 and $2,362,000 of income, respectively, under these agreements.
	Below is a summary of Alexander's latest available financial information:
		(Amounts in thousands)								Balance as of December 31,
		Balance Sheet:								2014			2013
			Assets							$	1,423,000		$	1,458,000
			Liabilities								1,075,000			1,124,000
			Stockholders' equity								348,000			334,000
							For the Year Ended December 31,
		Income Statement:					2014			2013			2012
			Total revenues				$	201,000		$	196,000		$	191,000
			Net income attributable to Alexander’s (1)					68,000			57,000			674,000
		-1	2012 includes a $600,000 net gain on sale of real estate.
	6. Investments in Partially Owned Entities – continued
	LNR Property LLC (“LNR”)
	In January 2013, we and the other equity holders of LNR entered into a definitive agreement to sell LNR for $1.053 billion, of which our share of the net proceeds was $240,474,000. The definitive agreement provided that LNR would not (i) make any cash distributions to the equity holders, including us, through the completion of the sale, which occurred on April 19, 2013, and (ii) take any of the following actions (among others) without the purchaser's approval, the lending or advancing of any money, the acquisition of assets in excess of specified amounts, or the issuance of equity interests. Notwithstanding the terms of the definitive agreement, in accordance with GAAP, we recorded our pro rata share of LNR's earnings on a one-quarter lag basis through the date of sale, which increased the carrying amount of our investment in LNR above our share of the net sales proceeds and resulted in us recognizing a $27,231,000 “other-than-temporary” impairment loss on our investment in the three months ended March 31, 2013.
	One Park Avenue
	On June 26, 2014, we invested an additional $22,700,000 to increase our ownership in One Park Avenue to 55.0% from 46.5% through a joint venture with an institutional investor, who increased its ownership interest to 45.0% (see Note 3 – Vornado Capital Partners Real Estate Fund). The transaction was based on a property value of $560,000,000. The property is encumbered by a $250,000,000 interest-only mortgage loan that bears interest at 4.995% and matures in March 2016. We account for our investment in the joint venture under the equity method because we share control over major decisions with our joint venture partner.
	61 Ninth Avenue
	On July 23, 2014, a joint venture in which we are a 50.1% partner entered into a 99-year ground lease for 61 Ninth Avenue located on the Southwest corner of Ninth Avenue and 15th Street in Manhattan. The venture's current plans are to construct an office building, with retail at the base, of approximately 130,000 square feet. Total development costs are currently estimated to be approximately $125,000,000. We account for our investment in the joint venture under the equity method because we share control over major decisions with our joint venture partner.
	The following is a summary of condensed combined financial information for all of our partially owned entities, including Toys, Alexander's and LNR (sold in April 2013), as of December 31, 2014 and 2013 and for the years ended December 31, 2014, 2013 and 2012.
		(Amounts in thousands)						Balance as of December 31,
		Balance Sheet:						2014			2013
			Assets					$	21,389,000		$	21,773,000
			Liabilities						17,986,000			17,982,000
			Noncontrolling interests						104,000			96,000
			Equity						3,299,000			3,695,000
					For the Year Ended December 31,
		Income Statement:			2014			2013			2012
			Total revenue		$	13,620,000		$	14,092,000		$	15,119,000
			Net (loss) income(1)			-434,000			-368,000			1,091,000
		-1	2012 includes a $600,000 net gain on sale of real estate.
	6. Investments in Partially Owned Entities - continued
	Below are schedules summarizing our investments in, and income from, partially owned entities.
										Percentage
(Amounts in thousands)									Ownership at		As of December 31,
Investments:									31-Dec-14		2014			2013
	Toys								32.60%		$	-		$	83,224
	Alexander’s								32.40%		$	131,616		$	167,785
	India real estate ventures								4.1%-36.5%			76,752			88,467
	Partially owned office buildings (1)								Various			760,749			621,294
	Other investments (2)								Various			277,379			288,897
											$	1,246,496		$	1,166,443
______________________________________________________
-1			Includes interests in 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue and others.
-2			Includes interests in Independence Plaza, Monmouth Mall, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street and others.
						Percentage
(Amounts in thousands)						Ownership at			For the Year Ended December 31,
Our Share of Net (Loss) Income:						31-Dec-14			2014			2013			2012
	Toys:
		Equity in net (loss) earnings					32.60%		$	-4,691		$	-128,919		$	45,267
		Non-cash impairment losses (see page 83 for details)								-75,196			-240,757			-40,000
		Management fees								6,331			7,299			9,592
									$	-73,556		$	-362,377		$	14,859
	Alexander's:
		Equity in net income					32.40%		$	21,287		$	17,721		$	24,709
		Management, leasing and development fees								8,722			6,681			13,748
		Net gain on sale of real estate								-			-			179,934
										30,009			24,402			218,391
	India real estate ventures (1)						4.1%-36.5%			-8,309			-3,533			-5,008
	Partially owned office buildings (2)						Various			93			-4,212			-3,770
	Other investments (3)						Various			-6,368			-10,817			103,644
	LNR (see page 85 for details):
		Equity in net income					n/a			-			42,186			66,270
		Impairment loss								-			-27,231			-
		Net gain on sale								-			3,776			-
										-			18,731			66,270
	Lexington (see page 82 for details): (4)						n/a
		Equity in net loss								-			-979			-23
		Net gain resulting from Lexington's stock issuance and asset
			acquisition							-			-			28,763
										-			-979			28,740
									$	15,425		$	23,592		$	408,267
______________________________________________________
-1			Includes a $5,771 non-cash impairment loss in 2014.
-2			Includes interests in 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue and others.
-3			Includes interests in Independence Plaza, Monmouth Mall, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street and others. In the third quarter of 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.
-4			In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable equity security - available for sale.
6. Investments in Partially Owned Entities - continued
		Below is a summary of the debt of our partially owned entities as of December 31, 2014 and 2013, none of which is recourse to us.
			Percentage				Interest
			Ownership at				Rate at		100% Partially Owned Entities’
(Amounts in thousands)			December 31,				December 31,		Debt at December 31,
			2014		Maturity		2014		2014			2013
Toys:
	Notes, loans and mortgages payable		32.60%		2015-2021		7.23%		$	5,748,350		$	5,702,247
Alexander's:
	Mortgages payable		32.40%		2015-2021		2.59%		$	1,032,780		$	1,049,959
Partially owned office buildings(1):
	Mortgages payable		Various		2015-2023		5.59%		$	3,691,274		$	3,622,759
India Real Estate Ventures:
	TCG Urban Infrastructure Holdings mortgages
		payable	25.00%		2015-2026		13.25%		$	183,541		$	199,021
Other(2):
	Mortgages payable		Various		2015-2023		4.33%		$	1,480,485		$	1,709,509
-1		Includes 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue and others.
-2		Includes Independence Plaza, Monmouth Mall, 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 $4,273,632,000 and $4,189,403,000 as of December 31, 2014 and 2013, respectively.

Mortgage_and_Mezzanine_Loans_R

Mortgage and Mezzanine Loans Receivable	12 Months Ended
	Dec. 31, 2014
Mezzanine Loans Receivable [Abstract]
Mortgage and Mezzanine Loans Receivable	7. Mortgage and Mezzanine Loans Receivable
	In October 2012, we acquired a 25% participation in a $475,000,000 first mortgage and mezzanine loan for the acquisition and redevelopment of a 10-story retail building at 701 Seventh Avenue in Times Square.  The loan had an interest rate of LIBOR plus 10.2%, with a LIBOR floor of 1.0%.  Of the $475,000,000, we funded $93,750,000, representing our 25% share of the $375,000,000 that was funded at acquisition. In March 2013, we transferred at par, the 25% participation in the mortgage loan. The transfer did not qualify for sale accounting given our continuing interest in the mezzanine loan. Accordingly, we continued to include the 25% participation in the mortgage loan in “other assets” and recorded a $59,375,000 liability in “other liabilities” on our consolidated balance sheet as of December 31, 2013. On January 14, 2014, the mortgage and mezzanine loans were repaid; accordingly, the $59,375,000 asset and liability were eliminated.
	On April 17, 2013, a $50,091,000 mezzanine loan that was scheduled to mature in August 2015, was repaid. In connection therewith, we received net proceeds of $55,358,000, including prepayment penalties, which resulted in income of $5,267,000, which is included in “interest and other investment income (loss), net” on our consolidated statement of income.
	In March 2014, a $30,000,000 mezzanine loan that was scheduled to mature in January 2015 was repaid. In May 2014, a $25,000,000 mezzanine loan that was scheduled to mature in November 2014 was repaid.
	As of December 31, 2014 and 2013, the carrying amounts of mortgage and mezzanine loans receivable were $16,748,000 and $170,972,000, respectively, net of an allowance of $5,811,000 and $5,845,000, respectively, and are included in “other assets” on our consolidated balance sheets. These loans have a weighted average interest rate of 9.1% and 11.0% at December 31, 2014 and 2013, respectively and have maturities ranging from April 2015 to May 2016.

Dispositions

Dispositions	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	8. Dispositions
	Discontinued Operations
	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 Fifth Avenue retail (see Note 4 – Acquisitions).
	Retail Properties
	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 Pennsylvania Real Estate Investment Trust (NYSE: PEI) (“PREIT”) in exchange for $465,000,000 comprised of $340,000,000 of cash and $125,000,000 of PREIT operating partnership units. In connection therewith, we recorded a non-cash impairment loss of $20,000,000 in the first quarter of 2014, which is included in “income from discontinued operations” on our consolidated statements of income. The redevelopment was substantially completed in October 2014, at which time we reclassified the assets, liabilities and financial results to discontinued operations, and the transfer of the property to PREIT was completed on March 31, 2015.
	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, which was recognized in the third quarter of 2014.
	In addition to the above, during 2014, we sold six of the 22 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.
	Retail Properties
	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.
	In addition to the above, during 2013, we 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.
	8. Dispositions - continued
	2012 Activity:
	Washington, DC
	On July 26, 2012, we sold 409 Third Street S.W., a 409,000 square foot office building in Washington, DC, for $200,000,000, which resulted in a net gain of $126,621,000.
	On November 7, 2012, we sold three office buildings (“Reston Executive”) located in suburban Fairfax County, Virginia, containing 494,000 square feet for $126,250,000, which resulted in a net gain of $36,746,000.
	Merchandise Mart
	On January 6, 2012, we sold the 350 West Mart Center, a 1.2 million square foot office building in Chicago, Illinois, for $228,000,000, which resulted in a net gain of $54,911,000.
	On June 22, 2012, we sold the L.A. Mart, a 784,000 square foot showroom building in Los Angeles, California, for $53,000,000, of which $18,000,000 was cash and $35,000,000 was nine-month seller financing at 6.0%, which was paid on December 28, 2012.
	On July 26, 2012, we sold the Washington Design Center, a 393,000 square foot showroom building in Washington, DC and the Canadian Trade Shows, for an aggregate of $103,000,000. The sale of the Canadian Trade Shows resulted in an after-tax net gain of $19,657,000.
	On December 31, 2012, we sold the Boston Design Center, a 554,000 square foot showroom building in Boston, Massachusetts, for $72,400,000, which resulted in a net gain of $5,252,000.
	Retail Properties
	In 2012, we sold 12 other properties in separate transactions, for an aggregate of $157,000,000, which resulted in a net gain aggregating $22,266,000.
	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 these 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, 2014 and 2013, and their combined results of operations for the years ended December 31, 2014, 2013 and 2012.
			Assets Related to				Liabilities Related to
		(Amounts in thousands)	Discontinued Operations as of				Discontinued Operations as of
			December 31,				December 31,
			2014		2013		2014		2013
		Retail	$	2,238,474	$	2,497,918	$	1,511,362	$	1,441,853
		New York		-		138,162		-		-
		Total	$	2,238,474	$	2,636,080	$	1,511,362	$	1,441,853
		(Amounts in thousands)			For the Year Ended December 31,
					2014		2013		2012
		Total revenues			$	394,056	$	499,964	$	581,392
		Total expenses				275,828		312,675		418,653
						118,228		187,289		162,739
		Net gains on sales of real estate				507,192		414,502		245,799
		Impairment losses				-41,474		-37,170		-127,839
		Gain on sale of Canadian Trade Shows, net of $11,448 of income taxes				-		-		19,657
		Gain on sale of assets other than real estate				-		1,377		8,491
		Income from discontinued operations			$	583,946	$	565,998	$	308,847

Identified_Intangible_Assets_a

Identified Intangible Assets and Liabilities	12 Months Ended
	Dec. 31, 2014
Identified Intangible Assets and Liabilities [Abstract]
Identified Intangible Assets and Intangible Liabilities	9. 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, 2014 and 2013.
			Balance as of December 31,
		(Amounts in thousands)	2014		2013
		Identified intangible assets:
		Gross amount	$	424,976	$	505,203
		Accumulated amortization		-199,821		-252,121
		Net	$	225,155	$	253,082
		Identified intangible liabilities (included in deferred revenue):
		Gross amount	$	657,976	$	622,685
		Accumulated amortization		-329,775		-295,768
		Net	$	328,201	$	326,917
	Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase to rental income of $37,516,000, $41,970,000 and $39,815,000 for the years ended December 31, 2014, 2013 and 2012, 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, 2015 is as follows:
		(Amounts in thousands)
		2015	$	49,550
		2016		37,894
		2017		35,069
		2018		34,166
		2019		23,928
	Amortization of all other identified intangible assets (a component of depreciation and amortization expense) was $28,275,000, $61,915,000 and $46,160,000 for the years ended December 31, 2014, 2013 and 2012, 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, 2015 is as follows:
		(Amounts in thousands)
		2015	$	25,735
		2016		20,122
		2017		16,619
		2018		12,417
		2019		10,470
	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 and $2,745,000 for the years ended December 31, 2014 and 2013 and a decrease to rent expense of $403,000 for the year ended December 31, 2012. Estimated annual amortization of these below-market leases, net of above-market leases, for each of the five succeeding years commencing January 1, 2015 is as follows:
		(Amounts in thousands)
		2015	$	1,832
		2016		1,832
		2017		1,832
		2018		1,832
		2019		1,832

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	10. Debt
	Secured Debt
	On January 31, 2014, we completed a $600,000,000 loan secured by our 220 Central Park South development site. The loan bears interest at LIBOR plus 2.75% (2.92% at December 31, 2014) and matures in January 2016, with three one-year extension options.
	On April 16, 2014, we completed a $350,000,000 refinancing of 909 Third Avenue, a 1.3 million square foot Manhattan office building. The seven-year interest only loan bears interest at 3.91% and matures in May 2021. We realized net proceeds of approximately $145,000,000 after defeasing the existing 5.64%, $193,000,000 mortgage, defeasance cost and other closing costs.
	On July 16, 2014, we completed a $130,000,000 financing of Las Catalinas, a 494,000 square foot mall located in the San Juan area of Puerto Rico. The 10-year fixed rate loan bears interest at 4.43% and matures in August 2024. The loan amortizes based on a 30-year schedule beginning in year six.
	On August 12, 2014, we completed a $185,000,000 financing of the Universal buildings, a 690,000 square foot, two-building office complex located in Washington, DC. The loan bears interest at LIBOR plus 1.90% (2.06% at December 31, 2014) and matures in August 2019 with two one-year extension options. The loan amortizes based on a 30-year schedule beginning in the fourth year.
	On August 26, 2014, we obtained a standby commitment for up to $500,000,000 of five-year mezzanine loan financing to fund a portion of the development expenditures at 220 Central Park South.
	On October 27, 2014, we completed a $140,000,000 financing of 655 Fifth Avenue, a 57,500 square foot retail and office property. The loan is interest only at LIBOR plus 1.40% (1.56% at December 31, 2014) and matures in October 2019 with two one-year extension options.
	On December 8, 2014, we completed a $575,000,000 refinancing of Two Penn Plaza, a 1.6 million square foot Manhattan office building. The loan is interest-only at LIBOR plus 1.65% (1.81% at December 31, 2014) and matures in 2019 with two one-year extension options. We realized net proceeds of approximately $143,000,000. Pursuant to an existing swap agreement, the $422,000,000 previous loan on the property was swapped to a fixed rate of 4.78% through March 2018. Therefore, $422,000,000 of the new loan bears interest at a fixed rate of 4.78% through March 2018 and the balance of $153,000,000 floats through March 2018. The entire $575,000,000 will float thereafter for the duration of the new loan.
	On January 6, 2015, we completed the modification of the $120,000,000, 6.04% mortgage loan secured by our Montehiedra Town Center, in the San Juan area of Puerto Rico. The loan has been extended from July 2016 to July 2021 and separated into two tranches, a senior $90,000,000 position with interest at 5.33% to be paid currently, and a junior $30,000,000 position with interest accruing at 3%. Montehiedra Town Center and the loan were included in the spin-off to UE on January 15, 2015. As part of the planned redevelopment of the property, UE is committed to fund $20,000,000 through a loan for leasing and building capital expenditures of which $8,000,000 has been funded. This loan is senior to the $30,000,000 position noted above and accrues interest at 10%.
	Senior Unsecured Notes
	On June 16, 2014, we completed a green bond public offering of $450,000,000 2.50% senior unsecured notes due June 30, 2019. The notes were sold at 99.619% of their face amount to yield 2.581%.
	On October 1, 2014, we redeemed all of the $445,000,000 principal amount of our outstanding 7.875% senior unsecured notes, which were scheduled to mature on October 1, 2039, at a redemption price of 100% of the principal amount plus accrued interest through the redemption date. In the fourth quarter of 2014, we wrote off $12,532,000 of unamortized deferred financing costs, which are included as a component of “interest and debt expense” on our consolidated statements of income.
	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.
	10. Debt – continued
	Unsecured Revolving Credit Facility
	On September 30, 2014, we extended one of our two $1.25 billion unsecured revolving credit facilities from November 2015 to November 2018 with two six-month extension options. The interest rate on the extended facility was lowered to LIBOR plus 105 basis points from LIBOR plus 125 basis points and the facility fee was reduced to 20 basis points from 25 basis points.
	The following is a summary of our debt:
						Weighted Average
						Interest Rate at			Balance at December 31,
		(Amounts in thousands)				31-Dec-14			2014		2013
		Mortgages Payable:
			Fixed rate				4.46%	$	6,499,396	$	6,439,371
			Variable rate				2.20%		1,763,769		691,860
							3.98%	$	8,263,165	$	7,131,231
		Unsecured Debt:
			Senior unsecured notes				3.89%	$	1,347,159	$	1,350,855
			Unsecured revolving credit facilities				-		-		295,870
							3.89%	$	1,347,159	$	1,646,725
	The net carrying amount of properties collateralizing the mortgages payable amounted to $9.4 billion at December 31, 2014. As of December 31, 2014, the principal repayments required for the next five years and thereafter are as follows:
							Senior Unsecured
							Debt and
		(Amounts in thousands)					Revolving Credit
		Year Ending December 31,			Mortgages Payable		Facilities
		2015		$	407,229	$	500,000
		2016			1,399,378		-
		2017			609,680		-
		2018			240,674		-
		2019			979,197		450,000
		Thereafter			4,624,897		400,000

Redeemable_Partnership_Units

Redeemable Partnership Units	12 Months Ended
	Dec. 31, 2014
Redeemable Noncontrolling Interests [Abstract]
Redeemable Partnership Units	11. Redeemable Partnership Units
	Redeemable partnership units on our consolidated balance sheets are primarily comprised of Class A 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 “partners' capital” on our consolidated balance sheets. Class A units may be tendered for redemption to us for cash; Vornado, at its 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 partnership units as of December 31, 2014 and 2013.
	(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			2014			2013	2014	2013	Preference		Rate
	Common:
		Class A units held by third parties		$	1,336,780	$	1,002,620	11,356,550	11,292,038		n/a	$	2.92
	Redeemable Preferred: (1)
		5.00% D-16 Cumulative Redeemable		$	1,000	$	1,000	1	1	$	1,000,000.00	$	50,000.00
	-1	Holders may tender units for redemption to us for cash at their stated redemption amount; Vornado, at its 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 any time.
	Below is a table summarizing the activity of redeemable partnership units.
		(Amounts in thousands)
		Balance at December 31, 2012	$	944,152
		Net income		24,817
		Other comprehensive income		5,296
		Distributions		-34,053
		Redemption of Class A units, at redemption value		-25,317
		Adjustments to carry redeemable Class A units at redemption value		108,252
		Redemption of Series D-15 redeemable units		-36,900
		Other, net		17,373
		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, 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
	Redeemable partnership units exclude our Series G Convertible Preferred units and Series D-13 Cumulative Redeemable Preferred units, as they are accounted for as liabilities in accordance with ASC 480, Distinguishing Liabilities and Equity, because of their possible settlement by issuing a variable number of Vornado common shares. Accordingly, the fair value of these units is included as a component of “other liabilities” on our consolidated balance sheets and aggregated $55,097,000 as of December 31, 2014 and 2013.

Partners_Capital

Partners' Capital	12 Months Ended
	Dec. 31, 2014
Partner's Capital [Abstract]
Partners' Capital	12. Partners' Capital
	Class A units
	As of December 31, 2014, there were 187,887,498 Class A units outstanding that were held by Vornado. These units are classified as “partners' capital” on our consolidated balance sheets. As of December 31, 2014, there were 11,356,550 Class A units outstanding, that were held by third parties. These units are classified outside of “partners' capital” as “redeemable partnership units” on our consolidated balance sheets (See Note 11 – Redeemable Partnership Units). During 2014, we paid an aggregate of $547,831,000 of distributions to Vornado comprised of quarterly common distributions of $0.73 per unit.
	Preferred Units
	The following table sets forth the details of our preferred units of beneficial interest as of December 31, 2014 and 2013.
	(Amounts in thousands, except unit and		Balance as of						Units Outstanding at			Per Unit		Annual
	per unit amounts)		December 31,						December 31,			Liquidation		Distribution
	Preferred Units		2014			2013			2014		2013	Preference		Rate(1)
	Convertible Preferred:
		6.5% Series A: authorized 83,977 units(2)	$	1,393		$	1,592		28,939		32,807	$	50	$	3.25
	Cumulative Redeemable:
		6.625% Series G: authorized 8,000,000 units(3)		193,135			193,135		8,000,000		8,000,000	$	25	$	1.65625
		6.625% Series I: authorized 10,800,000 units(3)		262,379			262,379		10,800,000		10,800,000	$	25	$	1.65625
		6.875% Series J: authorized 9,850,000 units(3)		238,842			238,842		9,850,000		9,850,000	$	25	$	1.71875
		5.70% Series K: authorized 12,000,000 units(3)		290,971			290,971		12,000,000		12,000,000	$	25	$	1.425
		5.40% Series L: authorized 12,000,000 units(3)		290,306			290,306		12,000,000		12,000,000	$	25	$	1.35
			$	1,277,026		$	1,277,225		52,678,939		52,682,807
	-1	Distributions on preferred units are cumulative and are payable quarterly in arrears.
	-2	Redeemable at the option of Vornado under certain circumstances, at a redemption price of 1.4334 Class A units per Series A Preferred unit plus accrued and unpaid distributions through the date of redemption, or convertible at any time at the option of the holder for 1.4334 Class A units per Series A Preferred unit.
	-3	Redeemable at Vornado's option at a redemption price of $25.00 per unit, plus accrued and unpaid distributions through the date of redemption.
	Accumulated Other Comprehensive Income (Loss)
	The following tables set forth the changes in accumulated comprehensive income (loss) by component.
				For the Year Ended December 31, 2014
							Securities			Pro rata share of		Interest
							available-			nonconsolidated		rate
	(Amounts in thousands)			Total			for-sale			subsidiaries' OCI		swap		Other
	Balance as of December 31, 2013			$	71,537		$	119,309		$	-11,501	$	-31,882	$	-4,389
	Net current period OCI				21,730			14,465			2,509		6,079		-1,323
	Balance as of December 31, 2014			$	93,267		$	133,774		$	-8,992	$	-25,803	$	-5,712

Variable_Interest_Entities_VIE

Variable Interest Entities ("VIEs")	12 Months Ended
	Dec. 31, 2014
Variable Interest Entities [Abstract]
Variable Interest Entities ("VIEs")	13. Variable Interest Entities (“VIEs”)
	Unconsolidated VIEs
	At December 31, 2014, we have unconsolidated VIEs comprised of our investments in the entities that own One Park Avenue, Independence Plaza, and the Warner Building, and at December 31, 2013, our unconsolidated VIEs comprised of our investments in the entities that own Independence Plaza and the Warner Building. We do not consolidate these entities because we are not the primary beneficiary and the nature of our involvement in the activities of these entities does not give us power over decisions that significantly affect these entities' economic performance. We account for our investment in these entities under the equity method (see Note 6 – Investments in Partially Owned Entities). As of December 31, 2014 and 2013, the net carrying amount of our investments in these entities was $286,783,000 and $152,929,000, respectively, and our maximum exposure to loss in these entities, is limited to our investments. We did not have any consolidated VIEs as of December 31, 2014 and 2013.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	14. Fair Value Measurements
	ASC 820, Fair Value Measurement and Disclosures 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) interest rate swaps and (v) mandatorily redeemable instruments (Series G-1 through G-4 convertible preferred units and Series D-13 cumulative redeemable preferred units). The tables below aggregate the fair values of these financial assets and liabilities by their levels in the fair value hierarchy at December 31, 2014 and 2013, respectively.
				As of December 31, 2014
	(Amounts in thousands)			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		$	-
				As of December 31, 2013
	(Amounts in thousands)			Total			Level 1			Level 2			Level 3
		Marketable securities		$	191,917		$	191,917		$	-		$	-
		Real Estate Fund investments (75% of which is attributable to
			noncontrolling interests)		667,710			-			-			667,710
		Deferred compensation plan assets (included in other assets)			116,515			47,733			-			68,782
			Total assets	$	976,142		$	239,650		$	-		$	736,492
		Mandatorily redeemable instruments (included in other liabilities)		$	55,097		$	55,097		$	-		$	-
		Interest rate swap (included in other liabilities)			31,882			-			31,882			-
			Total liabilities	$	86,979		$	55,097		$	31,882		$	-
	14. Fair Value Measurements - continued
	Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis - continued
	Real Estate Fund Investments
	At December 31, 2014, our Real Estate Fund had seven investments with an aggregate fair value of $513,973,000, or $176,899,000 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 0.8 to 6.0 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, which are derived from original underwriting assumptions, 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 Fund investments at December 31, 2014.
									Weighted Average
									(based on fair
		Unobservable Quantitative Input					Range		value of investments)
			Discount rates				12.0% to 17.5%		13.70%
			Terminal capitalization rates				4.7% to 6.5%		5.30%
	The above inputs are subject to change based on changes in economic and market conditions and/or changes in use or timing of exit. Changes in discount rates and terminal capitalization rates result in increases or decreases in the fair values of these investments. The discount rates encompass, among other things, uncertainties in the valuation models with respect to terminal capitalization rates and the amount and timing of cash flows. Therefore, a change in the fair value of these investments resulting from a change in the terminal capitalization rate, may be partially offset by a change in the discount rate. It is not possible for us to predict the effect of future economic or market conditions on our estimated fair values.
	The table below summarizes the changes in the fair value of Fund investments that are classified as Level 3, for the years ended December 31, 2014 and 2013.
					Real Estate Fund Investments
					For The Year Ended December 31,
		(Amounts in thousands)			2014			2013
		Beginning balance			$	667,710		$	600,786
		Purchases				3,392			43,816
		Dispositions / Distributions				-307,268			-70,848
		Net unrealized gains				73,802			85,771
		Net realized gains				76,337			8,184
		Other, net				-			1
		Ending balance			$	513,973		$	667,710
	14. Fair Value Measurements - continued
	Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis - continued
	Deferred Compensation Plan Assets
	Deferred compensation plan assets that are classified as Level 3 consist of investments in limited partnerships and investment funds, which are managed by third parties. We receive quarterly financial reports from a third-party administrator, which are compiled from the quarterly reports provided to them from each limited partnership and investment fund. The quarterly reports provide net asset values on a fair value basis which are audited by independent public accounting firms on an annual basis. The third-party administrator does not adjust these values in determining our share of the net assets and we do not adjust these values when reported in our consolidated financial statements.
	The table below summarizes the changes in the fair value of Deferred Compensation Plan Assets that are classified as Level 3, for the years ended December 31, 2014 and 2013.
					Deferred Compensation Plan Assets
					For The Year Ended December 31,
		(Amounts in thousands)			2014			2013
		Beginning balance			$	68,782		$	62,631
		Purchases				14,162			5,018
		Sales				-24,951			-7,306
		Realized and unrealized gains				3,415			7,189
		Other, net				1,907			1,250
		Ending balance			$	63,315		$	68,782
	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 and our investment in Toys that were written-down to estimated fair value during 2014 or 2013. See Note 2 – Basis of Presentation and Significant Accounting Policies for details of impairment losses recognized during 2014 and 2013. See Note 6 – Investments in Partially Owned Entities for details of impairment losses related to Toys recognized during 2014 and 2013. The fair value of our real estate assets was 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. In determining the fair value of our investment in Toys, we considered, among other inputs, a December 31, 2013 third-party valuation of Toys and Toys' historical results, financial forecasts and business outlook. Our determination of the fair value of our investment in Toys included consideration of the following widely-used valuation methodologies: (i) market multiple methodology, that considered comparable publicly traded retail companies and a range of EBITDA multiples from 5.75x to 6.5x, (ii) comparable sales transactions methodology, that considered sales of retailers ranging in size from $150 million to $3 billion, (iii) a discounted cash flow methodology, that utilized five-year financial projections and assumed a terminal EBITDA multiple of 5.75x, a 10% discount rate and a 38% tax rate, and (iv) a Black-Scholes valuation analysis, that assumed one, two and three year time-to-expiration periods and 24% to 29% volatility factors. Generally, we consider multiple valuation techniques when measuring fair values but in certain circumstances, a single valuation technique may be appropriate. The tables below aggregate the fair values of these assets by their levels in the fair value hierarchy.
					As of December 31, 2014
		(Amounts in thousands)			Total			Level 1			Level 2			Level 3
		Real estate assets		$	4,848		$	-		$	-		$	4,848
				As of December 31, 2013
	(Amounts in thousands)			Total			Level 1			Level 2			Level 3
		Real estate assets		$	354,341		$	-		$	-		$	354,341
		Investment in Toys			83,224			-			-			83,224
			Total assets	$	437,565		$	-		$	-		$	437,565
14. Fair Value Measurements – continued
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), mortgage and mezzanine loans receivable (included in “other assets” in our consolidated balance sheets) 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 is classified as Level 1 and the fair value of our mortgage and mezzanine loans receivable is classified as Level 3. 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, 2014 and 2013.
					As of December 31, 2014						As of December 31, 2013
					Carrying			Fair			Carrying			Fair
	(Amounts in thousands)				Amount			Value			Amount			Value
			Cash equivalents		$	749,418		$	749,000		$	295,000		$	295,000
			Mortgage and mezzanine loans receivable
				(included in other assets)		16,748			17,000			170,972			171,000
					$	766,166		$	766,000		$	465,972		$	466,000
		Debt:
			Mortgages payable		$	8,263,165		$	8,224,000		$	7,131,231		$	6,903,000
			Senior unsecured notes			1,347,159			1,385,000			1,350,855			1,402,000
			Revolving credit facility debt			-			-			295,870			296,000
					$	9,610,324		$	9,609,000		$	8,777,956		$	8,601,000

Stockbased_Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation	15.       Stock-based Compensation
	Vornado's Omnibus Share Plan (the “Plan”), which was approved in May 2010, provides the Compensation Committee of Vornado's Board of Trustees (the “Committee”) the ability to grant incentive and non-qualified Vornado stock options, restricted stock, restricted partnership units and out-performance plan awards to certain of Vornado's employees and officers. Under the Plan, awards may be granted up to a maximum of 6,000,000 Vornado shares, if all awards granted are Full Value Awards, as defined, and up to 12,000,000 shares, if all of the awards granted are Not Full Value Awards, as defined, plus shares in respect of awards forfeited after May 2010 that were issued pursuant to Vornado's 2002 Omnibus Share Plan. Full Value Awards are awards of securities, such as Vornado restricted shares, that, if all vesting requirements are met, do not require the payment of an exercise price or strike price to acquire the securities. Not Full Value Awards are awards of securities, such as Vornado stock options, that do require the payment of an exercise price or strike price. This means, for example, if the Committee were to award only Vornado restricted shares, it could award up to 6,000,000 Vornado restricted shares. On the other hand, if the Committee were to award only Vornado stock options, it could award options to purchase up to 12,000,000 Vornado common 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, 2014, Vornado has approximately 4,004,000 shares available for future grants under the Plan, if all awards granted are Full Value Awards, as defined.
	In the years ended December 31, 2014, 2013 and 2012, we recognized an aggregate of $36,641,000, $34,914,000 and $30,588,000, respectively, of stock-based compensation expense, which is included as a component of “general and administrative” expenses on our consolidated statements of income. 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 Vornado's Chairman and Chief Executive Officer, have the opportunity to earn compensation payable in the form of units if, and only if, Vornado outperforms a predetermined total shareholder return (“TSR”) and/or outperforms the market with respect to a relative TSR in any year during the requisite performance periods as described below.   The aggregate notional amounts of the 2012, 2013, 2014 and 2015 OPPs are $40,000,000, $40,000,000, $50,000,000 and $40,000,000, respectively.
	Awards under the 2012 OPP have been earned.  Awards under the 2013 OPP may be earned if Vornado (i) achieves a TSR greater than 14% over the two-year performance measurement period, or 21% over the three-year performance measurement period (the “Absolute Component”), and/or (ii) achieves a TSR above that of the SNL REIT Index (the “Index”) over the two-year or three-year performance measurement period (the “Relative Component”). Awards under the 2014 and 2015 OPP may be earned if Vornado (i) achieves a TSR level greater than 7% per annum, or 21% over the three-year performance measurement periods (the “Absolute Component”), and/or (ii) achieves a TSR above that of the Index over the three-year performance measurement periods (the “Relative Component”). To the extent awards would be earned under the Absolute Component of each of the OPPs, but Vornado underperforms the Index, such awards would be reduced (and potentially fully negated) based on the degree to which Vornado underperforms the Index.  In certain circumstances, in the event Vornado outperforms 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 Vornado fails to achieve at least a 6% per annum absolute TSR, such awards earned under the Relative Component would be reduced based on Vornado's absolute TSR, with no awards being earned in the event Vornado's TSR during the applicable measurement period is 0% or negative, irrespective of the degree to which Vornado may outperform the Index.  Distributions on awards earned accrue during the performance period.
	If the designated performance objectives are achieved, OPP units are also 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. Vornado's executive officers (for the purposes of Section 16 of the Exchange Act) are required to hold earned 2013, 2014 and 2015 OPP awards for one year following vesting.
	The fair value of the 2012, 2013, 2014 and 2015 OPPs on the date of grant was $12,250,000, $6,814,000, $8,202,000, and $9,120,000, respectively. 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, 2014, 2013 and 2012, we recognized $6,185,000, $3,226,000 and $2,826,000, respectively, of compensation expense related to OPPs. As of December 31, 2014, there was $11,937,000 of total unrecognized compensation cost related to the OPPs, which will be recognized over a weighted-average period of 1.4 years.
	15.       Stock-based Compensation - continued
	Stock Options
	Stock options are granted at an exercise price equal to the average of the high and low market price of Vornado's 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 Vornado stock option awards is recognized on a straight-line basis over the vesting period. In the years ended December 31, 2014, 2013 and 2012, we recognized $4,550,000, $8,234,000 and $8,638,000, respectively, of compensation expense related to Vornado stock options that vested during each year. As of December 31, 2014, there was $1,855,000 of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of 1.5 years.
	Below is a summary of Vornado's stock option activity for the year ended December 31, 2014.
									Weighted-
						Weighted-			Average
						Average			Remaining	Aggregate
						Exercise			Contractual	Intrinsic
				Shares		Price			Term	Value
		Outstanding at January 1, 2014		3,248,699		$	67.51
		Granted		49,088			91.32
		Exercised		-434,204			67.27
		Cancelled or expired		-43,468			104.74
		Outstanding at December 31, 2014		2,820,115		$	67.38		4.6	$	145,317,000
		Options vested and expected to vest at
			31-Dec-14	2,818,587		$	67.37		4.6	$	145,271,000
		Options exercisable at December 31, 2014		2,606,260		$	65.62		4.4	$	138,912,000
	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, 2014, 2013 and 2012.
			December 31,
			2014		2013		2012
		Expected volatility	36.00%		36.00%		36.00%
		Expected life	5.0 years		5.0 years		5.0 years
		Risk free interest rate	1.81%		0.91%		1.05%
		Expected dividend yield	4.10%		4.30%		4.30%
	The weighted average grant date fair value of options granted during the years ended December 31, 2014, 2013 and 2012 was $20.31, $17.18 and $17.50, respectively. Cash received from option exercises for the years ended December 31, 2014, 2013 and 2012 was $17,441,000, $5,915,000 and $9,546,000, respectively. The total intrinsic value of options exercised during the years ended December 31, 2014, 2013 and 2012 was $18,223,000, $3,386,000 and $40,887,000, respectively.
	15.       Stock-based Compensation - continued
	Restricted Stock
	Restricted stock awards are granted at the average of the high and low market price of Vornado's 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, 2014, 2013 and 2012, we recognized $1,303,000, $1,344,000 and $1,604,000, respectively, of compensation expense related to restricted stock awards that vested during each year. As of December 31, 2014, there was $1,468,000 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 $88,000, $110,000 and $200,000 for the years ended December 31, 2014, 2013 and 2012, respectively.
	Below is a summary of Vornado's restricted stock activity under the Plan for the year ended December 31, 2014.
							Weighted-Average
							Grant-Date
		Unvested Shares			Shares		Fair Value
			Unvested at January 1, 2014		29,664		$	79.24
			Granted		11,475			91.31
			Vested		-15,733			74.61
			Cancelled or expired		-2,957			87.42
			Unvested at December 31, 2014		22,449			87.58
	Restricted stock awards granted in 2014, 2013 and 2012 had a fair value of $1,048,000, $857,000 and $929,000, respectively. The fair value of restricted stock that vested during the years ended December 31, 2014, 2013 and 2012 was $1,174,000, $1,194,000 and $1,864,000, respectively.
	Restricted Operating Partnership Units (“OP Units”)
	OP Units are granted at the average of the high and low market price of Vornado's 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 defined. 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, 2014, 2013 and 2012, we recognized $24,603,000, $22,110,000 and $17,520,000, respectively, of compensation expense related to OP Units that vested during each year. As of December 31, 2014, there was $20,798,000 of total unrecognized compensation cost related to unvested OP Units, which is expected to be recognized over a weighted-average period of 1.7 years. Distributions paid on unvested OP Units are charged to “preferred unit distributions” on our consolidated statements of income and amounted to $2,866,000, $2,598,000 and $3,203,000 in the years ended December 31, 2014, 2013 and 2012, respectively.
	Below is a summary of restricted OP unit activity under the Plan for the year ended December 31, 2014.
							Weighted-Average
							Grant-Date
		Unvested Units			Units		Fair Value
			Unvested at January 1, 2014		765,971		$	76.27
			Granted		226,638			86.79
			Vested		-327,555			69.48
			Cancelled or expired		-6,575			83.16
			Unvested at December 31, 2014		658,479			83.2
	OP Units granted in 2014, 2013 and 2012 had a fair value of $19,669,000, $31,947,000 and $16,464,000, respectively. The fair value of OP Units that vested during the years ended December 31, 2014, 2013 and 2012 was $22,758,000, $16,404,000 and $15,014,000, respectively.

Fee_and_Other_Income

Fee and Other Income	12 Months Ended
	Dec. 31, 2014
Fee and Other Income [Abstract]
Fee and Other Income	16. 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,
			2014		2013		2012
	BMS cleaning fees		$	85,658	$	66,505	$	67,584
	Management and leasing fees			19,905		23,073		18,718
	Lease termination fees(1)			16,362		32,630		2,287
	Other income			33,281		33,363		30,488
			$	155,206	$	155,571	$	119,077
	__________________________
	-1	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 entities, which is included in “income from partially owned entities” (see Note 6 – Investments in Partially Owned Entities).

Interest_and_Other_Investment_

Interest and Other Investment Income (Loss), Net	12 Months Ended
	Dec. 31, 2014
Interest and Other Investment (Loss) Income, net [Abstract]
Interest and Other Investment Income (Loss), Net
	17. Interest and Other Investment Income (Loss), Net
	The following table sets forth the details of our interest and other investment income (loss):
	(Amounts in thousands)		For the Year Ended December 31,
			2014		2013		2012
	Dividends and interest on marketable securities		$	12,707	$	11,446	$	11,979
	Mark-to-market of investments in our deferred compensation plan (1)			11,557		10,636		6,809
	Interest on mezzanine loans receivable			3,920		19,495		13,861
	Losses from the disposition of investment in J.C. Penney			-		-72,974		-300,752
	Other, net			10,568		6,510		6,903
			$	38,752	$	-24,887	$	-261,200
	__________________________
	-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, 2014
Interest Expense Debt [Abstract]
Interest And Debt Expense [Text Block]	18. Interest and Debt Expense
	The following table sets forth the details of our interest and debt expense.
	(Amounts in thousands)	For the Year Ended December 31,
		2014		2013		2012
	Interest expense	$	430,278	$	444,412	$	427,147
	Amortization of deferred financing costs		45,263		23,673		20,889
	Capitalized interest and debt expense		-62,786		-42,303		-16,801
		$	412,755	$	425,782	$	431,235

Income_Per_Class_A_Unit

Income Per Class A Unit	12 Months Ended
	Dec. 31, 2014
Income Per Class A Unit [Abstract]
Income Per Unit	19.       Income Per Class A Unit
	The following table provides a reconciliation of both net income and the number of Class A units used in the computation of (i) basic income per Class A unit - which includes the weighted average number of Class A units outstanding without regard to dilutive potential Class A units, and (ii) diluted income per Class A unit - which includes the weighted average Class A units and dilutive unit equivalents. Dilutive unit equivalents may include our Series A convertible preferred units, Vornado stock options and restricted units.
	(Amounts in thousands, except per unit amounts)			Year Ended December 31,
				2014		2013		2012
	Numerator:
		Income (loss) from continuing operations, net of income attributable to
			noncontrolling interests	$	328,519	$	-62,146	$	351,979
		Income from discontinued operations, net of income attributable to noncontrolling
			interests		583,946		562,934		310,544
		Net income attributable to Vornado Realty L.P.			912,465		500,788		662,523
		Preferred unit distributions			-81,514		-83,965		-86,873
		Preferred unit redemptions			-		-1,130		8,948
		Net income attributable to Class A unitholders			830,951		415,693		584,598
		Earnings allocated to unvested participating securities			-4,260		-2,705		-3,413
		Numerator for basic income per Class A unit			826,691		412,988		581,185
		Impact of assumed conversions:
			Convertible preferred unit distributions		97		-		113
		Numerator for diluted income per Class A unit		$	826,788	$	412,988	$	581,298
	Denominator:
		Denominator for basic income per Class A unit – weighted average units			198,213		197,551		197,082
		Effect of dilutive securities (1):
			Vornado stock options and restricted unit awards		1,557		1,092		1,002
			Convertible preferred units		43		-		50
		Denominator for diluted income per Class A unit – weighted average units and
			assumed conversions		199,813		198,643		198,134
	INCOME (LOSS) PER CLASS A UNIT – BASIC:
		Income (loss) from continuing operations, net		$	1.22	$	-0.76	$	1.37
		Income from discontinued operations, net			2.95		2.85		1.58
		Net income per Class A unit		$	4.17	$	2.09	$	2.95
	INCOME (LOSS) PER CLASS A UNIT – DILUTED:
		Income (loss) from continuing operations, net		$	1.22	$	-0.75	$	1.36
		Income from discontinued operations, net			2.92		2.83		1.57
		Net income per Class A unit		$	4.14	$	2.08	$	2.93
	-1		The effect of dilutive securities in the years ended December 31, 2014, 2013 and 2012 excludes an aggregate of 116, 818 and 2,796 weighted average Class A unit equivalents, respectively, as their effect was anti-dilutive.

Leases

Leases	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Leases [Text Block]	20.       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, 2014, 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 the exercise of renewal options, are as follows:
		(Amounts in thousands)
		Year Ending December 31:
		2015	$	1,564,200
		2016		1,509,781
		2017		1,470,810
		2018		1,395,708
		2019		1,236,840
		Thereafter		6,990,557
	These amounts do not include percentage rentals based on tenants' sales. These percentage rents approximated $6,343,000, $7,344,000 and $6,987,000, for the years ended December 31, 2014, 2013 and 2012, respectively.
	None of our tenants accounted for more than 10% of total revenues in any of the years ended December 31, 2014, 2013 and 2012.
	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, 2014 are as follows:
		(Amounts in thousands)
		Year Ending December 31:
		2015	$	29,060
		2016		29,575
		2017		31,141
		2018		31,629
		2019		32,136
		Thereafter		1,208,483
	Rent expense was $36,329,000, $35,920,000 and $27,634,000 for the years ended December 31, 2014, 2013 and 2012, respectively.
	20.       Leases - continued
	We are also a lessee under a capital lease under which we will redevelop the retail and signage components of the Marriott 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, 2014, future minimum lease payments under this capital lease are as follows:
		(Amounts in thousands)
		Year Ending December 31:
		2015	$	12,500
		2016		12,500
		2017		12,500
		2018		12,500
		2019		12,500
		Thereafter		334,792
		Total minimum obligations		397,292
		Interest portion		-157,292
		Present value of net minimum payments	$	240,000
	At December 31, 2014, the carrying amount of the property leased under the capital lease was $249,253,000, which is included as a component of “development costs and construction in progress” on our consolidated balance sheet and present value of net minimum payments of $240,000,000 is included in “other liabilities” on our consolidated balance sheet.

Multiemployer_Benefit_Plans

Multiemployer Benefit Plans	12 Months Ended
	Dec. 31, 2014
Multiemployer Plans [Abstract]
Multiemployer Benefit Plans	21.       Multiemployer 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 subsidiary withdraws from a plan in which it participates, it may be subject to a withdrawal liability. As of December 31, 2014, our subsidiaries' participation in these plans were not significant to our consolidated financial statements.
	In the years ended December 31, 2014, 2013 and 2012, our subsidiaries contributed $11,431,000, $10,223,000 and $10,683,000, 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 plans for the years ended December 31, 2014, 2013 and 2012.
	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, 2014, 2013 and 2012, our subsidiaries contributed $29,073,000, $26,262,000 and $26,759,000, respectively, towards these 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, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	22.       Commitments and Contingencies
	Insurance
	We maintain general liability insurance with limits of $300,000,000 per occurrence and all risk property and rental value insurance with limits of $2.0 billion per occurrence, with sub-limits for certain perils such as floods. Our California properties have earthquake insurance with coverage of $180,000,000 per occurrence, subject to a deductible in the amount of 5% of the value of the affected property, up to a $180,000,000 annual aggregate. 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, 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 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 $3,200,000 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 adversely affect our ability to finance our properties and expand our portfolio.
	Other Commitments and Contingencies
	We are from time to time involved in legal actions arising in the ordinary course of business. In our opinion, after consultation with legal counsel, the outcome of such matters is not expected to have a material adverse effect on our financial position, results of operations or cash flows.
	Each of our properties has been subjected to varying degrees of environmental assessment at various times. The environmental assessments did not reveal any material environmental contamination. However, there can be no assurance that the identification of new areas of contamination, changes in the extent or known scope of contamination, the discovery of additional sites, or changes in cleanup requirements would not result in significant costs to us.
	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, 2014, the aggregate dollar amount of these guarantees and master leases is approximately $359,000,000.
	At December 31, 2014, $39,552,000 of letters of credit were outstanding under one of our revolving credit facilities. Our 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 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, 2014, we expect to fund additional capital to certain of our partially owned entities aggregating approximately $104,000,000.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions Abstract
Related Party Transactions Disclosure [Text Block]	23.       Related Party Transactions
	Alexander's
	We own 32.4% of Alexander's. Steven Roth, the Chairman of Vornado's Board of Trustees and its Chief Executive Officer is also the Chairman of Alexander's Board of Directors and its Chief Executive Officer. 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 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 partners. As of December 31, 2014, Interstate and its partners beneficially owned an aggregate of approximately 6.6% of the common shares of beneficial interest of Vornado and 26.3% 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 $535,000, $606,000, and $794,000 of management fees under the agreement for the years ended December 31, 2014, 2013 and 2012.
	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 Interstate's properties. Fees for these services are similar to the fees we are receiving from Interstate described above.

Summary_of_Quarterly_Results_U

Summary of Quarterly Results (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Data [Abstract]
Summary of Quarterly Results (Unaudited)	24.       Summary of Quarterly Results (Unaudited)
	The following summary represents the results of operations for each quarter in 2014 and 2013:
							Net Income (Loss)
							Attributable		Net Income (Loss) Per
							to Class A		Class A Unit (2)
		(Amounts in thousands, except per unit amounts)			Revenues		Unitholders (1)		Basic		Diluted
			2014
				31-Dec	$	597,010	$	544,287	$	2.73	$	2.71
				30-Sep		578,710		139,134		0.7		0.69
				30-Jun		574,411		81,333		0.41		0.4
				31-Mar		562,381		66,197		0.33		0.33
			2013
				31-Dec	$	570,977	$	-73,042	$	-0.37	$	-0.37
				30-Sep		578,322		88,037		0.44		0.44
				30-Jun		582,258		154,775		0.78		0.78
				31-Mar		567,619		245,923		1.24		1.23
	_______________________________
		-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, 2014
Segment Reporting [Abstract]
Segment Information	25. Segment Information
	As a result of the spin-off of substantially all of our Retail Properties segment (see Note 1 – Organization and Business), 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 reportable segment. Accordingly, 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, 2014, 2013 and 2012.
	(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, including Toys					-58,131		20,701			-3,677			-75,155
	Income from Real Estate Fund					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					434,361		418,364			100,243			-84,246
	Income tax expense					-9,281		-4,305			-242			-4,734
	Income (loss) from continuing operations					425,080		414,059			100,001			-88,980
	Income from discontinued operations					583,946		463,163			-			120,783
	Net income					1,009,026		877,222			100,001			31,803
	Less net income attributable to noncontrolling interests in
		consolidated subsidiaries				-96,561		-8,626			-			-87,935
	Net income (loss) attributable to Vornado Realty L.P.					912,465		868,596			100,001			-56,132
	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)				$	2,277,084	$	1,439,189	(3)	$	335,590	(4)	$	502,305	(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					1,246,496		1,036,130			102,635			107,731
	Total assets					21,248,320		10,752,763			4,310,974			6,184,583
	See notes on pages 111 and 112.
	25. Segment Information – continued
	(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, including Toys					-338,785		15,527			-6,968			-347,344
	Income from Real Estate Fund					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					-9,975		399,327			84,359			-493,661
	Income tax benefit (expense)					8,717		-2,794			14,031			-2,520
	(Loss) income from continuing operations					-1,258		396,533			98,390			-496,181
	Income from discontinued operations					565,998		160,314			-			405,684
	Net income (loss)					564,740		556,847			98,390			-90,497
	Less net income attributable to noncontrolling interests in
		consolidated subsidiaries				-63,952		-10,786			-			-53,166
	Net income (loss) attributable to Vornado Realty L.P.					500,788		546,061			98,390			-143,663
	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)				$	2,018,697	$	1,079,682	(3)	$	341,223	(4)	$	597,792	(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					1,249,667		904,278			100,543			244,846
	Total assets					20,097,224		9,255,964			4,107,636			6,733,624
	See notes on page 111 and 112.
	25. Segment Information – continued
	(Amounts in thousands)			For the Year Ended December 31, 2012
					Total		New York			Washington, DC			Other
	Total revenues				$	2,332,724	$	1,319,470		$	554,028		$	459,226
	Total expenses					1,738,381		835,563			360,056			542,762
Operating income (loss)					594,343		483,907			193,972			-83,536
Income (loss) from partially owned entities, including Toys					423,126		207,773			-5,612			220,965
Income from Real Estate Fund					63,936		-			-			63,936
Interest and other investment (loss) income, net					-261,200		4,002			126			-265,328
Interest and debt expense					-431,235		-146,350			-115,574			-169,311
Net gain on disposition of wholly owned and partially
	owned assets				4,856		-			-			4,856
Income (loss) before income taxes					393,826		549,332			72,912			-228,418
Income tax expense					-8,132		-3,491			-1,650			-2,991
Income (loss) from continuing operations					385,694		545,841			71,262			-231,409
Income from discontinued operations					308,847		30,293			167,766			110,788
Net income (loss)					694,541		576,134			239,028			-120,621
Less net income attributable to noncontrolling interests in
	consolidated subsidiaries				-32,018		-2,138			-			-29,880
Net income (loss) attributable to Vornado Realty L.P.					662,523		573,996			239,028			-150,501
Interest and debt expense(2)					760,523		187,855			133,625			439,043
Depreciation and amortization(2)					735,293		252,257			157,816			325,220
Income tax expense (2)					7,026		3,751			1,943			1,332
EBITDA(1)				$	2,165,365	$	1,017,859	(3)	$	532,412	(4)	$	615,094	(5)
Balance Sheet Data:
Real estate at cost				$	15,287,078	$	8,687,141		$	4,171,879		$	2,428,058
Investments in partially owned entities					1,704,297		576,336			95,670			1,032,291
Total assets					22,065,049		9,215,438			4,196,694			8,652,917
See notes on page 111 and 112.
25. Segment Information – continued
	Notes to preceding tabular information:
-1	EBITDA represents "Earnings Before Interest, Taxes, Depreciation and Amortization." We consider EBITDA a supplemental measure for making decisions and assessing the unlevered performance of our segments as it relates to the total return on assets as opposed to the levered return on equity. As properties are bought and sold based on a multiple of EBITDA, we utilize this measure to make investment decisions as well as to compare the performance of our assets to that of our peers. EBITDA should not be considered a substitute for net income. EBITDA may not be comparable to similarly titled measures employed by other companies.
-2	Interest and debt expense, depreciation and amortization and income tax expense (benefit) in the reconciliation of net income (loss) to EBITDA includes our share of these items from partially owned entities.
-3	The elements of "New York" EBITDA are summarized below.
						For the Year Ended December 31,
	(Amounts in thousands)					2014			2013			2012
	Office(a)					$	1,085,262		$	759,941		$	568,518
	Retail						281,428			246,808			189,484
	Alexander's(b)						41,746			42,210			231,402
	Hotel Pennsylvania						30,753			30,723			28,455
		Total New York				$	1,439,189		$	1,079,682		$	1,017,859
	(a)		2014 and 2013 includes $440,537 and $127,512 net gains on sale of real estate, respectively.
	(b)		2012 includes $179,934 for our share of net gain on sale of Kings Plaza.
-4	The elements of "Washington, DC" EBITDA are summarized below.
						For the Year Ended December 31,
	(Amounts in thousands)					2014			2013			2012
	Office, excluding the Skyline Properties (a)					$	266,859		$	268,373		$	449,448
	Skyline properties						27,150			29,499			40,037
		Total Office					294,009			297,872			489,485
	Residential						41,581			43,351			42,927
		Total Washington, DC				$	335,590		$	341,223		$	532,412
	(a)		2012 includes $163,367 of net gains on sale of real estate.
25. Segment Information – continued
	Notes to preceding tabular information:
-5	The elements of "other" EBITDA from continuing operations are summarized below.
	(Amounts in thousands)					For the Year Ended December 31,
						2014			2013				2012
	Our share of Real Estate Fund:
		Income before net realized/unrealized gains				$	8,056		$	7,752		$	6,385
		Net realized/unrealized gains on investments					37,535			23,489			13,840
		Carried interest					24,715			18,230			4,379
	Total						70,306			49,471			24,604
	Our share of Toys "R" Us						103,632			-12,081			281,289
	The Mart and trade shows						79,636			74,270			62,470
	555 California Street						48,844			42,667			46,167
	India real estate ventures						6,434			5,841			3,654
	LNR(a)						-			20,443			75,202
	Lexington(b)						-			6,931			32,595
	Other investments						26,586			28,505			25,103
							335,438			216,047			551,084
	Corporate general and administrative expenses(c)						-94,929			-94,904			-89,082
	Investment income and other, net(c)						31,665			46,525			45,563
	Urban Edge Properties and residual retail properties discontinued operations(d)						235,989			531,493			201,035
	Acquisition and transaction related costs, and impairment losses						-16,392			-24,857			-17,386
	Net gain on sale of marketable securities, land parcels and residential
		condominiums					13,568			56,868			4,856
	Our share of debt satisfaction gains and net gains on sale of real estate
		of partially owned entities					13,000			-			-
	Suffolk Downs impairment loss and loan reserve						-10,263			-			-
	Our share of impairment losses of partially owned entities						-5,771			-			-4,936
	Losses from the disposition of investment in J.C. Penney						-			-127,888			-300,752
	Severance costs (primarily reduction in force at the Mart)						-			-5,492			-3,005
	Purchase price fair value adjustment and accelerated amortization of
		discount on investment in subordinated debt of Independence Plaza					-			-			105,366
	The Mart discontinued operations						-			-			93,588
	Net gain resulting from Lexington's stock issuance and asset acquisition						-			-			28,763
						$	502,305		$	597,792		$	615,094
	(a)		On April 19, 2013, LNR was sold.
	(b)		In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable equity security - available for sale. This investment was previously accounted for under the equity method (see page 82 for details).
	(c)		The amounts in these captions (for this table only) exclude income/expense from the mark-to-market of our deferred compensation plan of $11,557, $10,636 and $6,809 for the years ended December 31, 2014, 2013 and 2012, respectively.
	(d)		The year ended December 31, 2014, includes $14,956 of transaction costs related to the spin-off of our strip shopping centers and malls.

Basis_of_Presentation_and_Sign1

Basis of Presentation and Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2014
Basis of Presentation and Significant Accounting Policies [Abstract]
Basis of Presentation Policy
	Basis of Presentation
	The accompanying consolidated financial statements include the accounts of Vornado Realty L.P. and its consolidated subsidiaries. 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.
New Accounting Pronouncements Policy [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 begin after December 15, 2014. Upon adoption of this standard, individual properties sold in the ordinary course of business are not expected to qualify as discontinued operations. The financial results of our strip shopping centers and malls, which were spun off to UE on January 15, 2015, will be treated as a discontinued operation in the first quarter of 2015.
Real Estate [Policy Text Block]	2. Basis of Presentation and Significant Accounting Policies - continued
	Significant Accounting Policies
	Real Estate: Real estate is carried at cost, net of accumulated depreciation and amortization. Betterments, major renewals and certain costs directly related to the improvement and leasing of real estate are capitalized. Maintenance and repairs are expensed as incurred. For redevelopment of existing operating properties, the net book value of the existing property under redevelopment plus the cost for the construction and improvements incurred in connection with the redevelopment are capitalized to the extent the capitalized costs of the property do not exceed the estimated fair value of the redeveloped property when complete. If the cost of the redeveloped property, including the 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 $62,786,000 and $42,303,000 for the years ended December 31, 2014 and 2013, respectively.
	Upon the acquisition of real estate, we assess the fair value of acquired assets (including land, buildings and improvements, identified intangibles, such as acquired above and below-market leases, 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 indicate that the carrying amount may not be recoverable. An impairment exists when the carrying amount of an asset exceeds the aggregate projected future cash flows over the anticipated holding period on an undiscounted basis. An impairment loss is measured based on the excess of the property's carrying amount over its estimated fair value. Impairment analyses are based on our current plans, intended holding periods and available market information at the time the analyses are prepared. If our estimates of the projected future cash flows, anticipated holding periods, or market conditions change, our evaluation of impairment losses may be different and such differences could be material to our consolidated financial statements. The evaluation of anticipated cash flows is subjective and is based, in part, on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results. Plans to hold properties over longer periods decrease the likelihood of recording impairment losses.
Partially Owned Entities [Policy Text Block]	Partially Owned Entities: 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 secured 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 accounted for on the cost method.
	Investments in partially owned entities are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. An impairment loss is measured based on the excess of the carrying amount of an investment over its estimated fair value. Impairment analyses are based on current plans, intended holding periods and available information at the time the analyses are prepared.
Mezzanine Loans Receivable [Policy Text Block]	Mortgage and Mezzanine Loans Receivable: We invest in mortgage and mezzanine loans of entities that have significant real estate assets. These investments are either secured by the real property or by pledges of the equity interests of the entities owning the underlying real estate. We record these investments at the stated principal amount net of any unamortized discount or premium. We accrete or amortize any discount or premium over the life of the related receivable utilizing the effective interest method or straight-line method, if the result is not materially different. We evaluate the collectibility of both interest and principal of each of our loans whenever events or changes in circumstances indicate such amounts may not be recoverable. A loan is impaired when it is probable that we will be unable to collect all amounts due according to the existing contractual terms. When a loan is impaired, the amount of the loss accrual is calculated by comparing the carrying amount of the investment to the present value of expected future cash flows discounted at the loan's effective interest rate, or as a practical expedient, to the value of the collateral if the loan is collateral dependent. Interest on impaired loans is recognized when received in cash.
Cash And Cash Equivalents [Policy Text Block]	Cash and Cash Equivalents: Cash and cash equivalents consist of highly liquid investments with original maturities of three months or less 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 Deposits placed through an Account Registry Service (“CDARS”).
Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy	Restricted Cash: Restricted cash consists of security deposits, cash restricted for the purposes 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. As of December 31, 2014 and 2013, we had $12,210,000 and $14,519,000, respectively, in allowances for doubtful accounts. In addition, as of December 31, 2014 and 2013, we had $3,188,000 and $4,355,000, respectively, in allowances for receivables arising from the straight-lining of rents.
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.
	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, 2014 and 2013, our derivative instruments consisted of an interest rate cap and an interest rate swap. 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.
Revenue Recognition [Policy Text Block]	Revenue Recognition: We have the following revenue sources and revenue recognition policies:
	•       Base Rent — income arising from tenant leases. These rents are recognized over the non-cancelable term of the related leases on a straight-line basis which includes the effects of rent steps and rent abatements under the leases. We commence rental revenue recognition when the tenant takes possession of the leased space and the leased space is substantially ready for its intended use. In addition, in circumstances where we provide a tenant improvement allowance for improvements that are owned by the tenant, we recognize the allowance as a reduction of rental revenue on a straight-line basis over the term of the lease.
	•       Percentage Rent — income arising from retail tenant leases that is contingent upon tenant sales exceeding defined thresholds. These rents are recognized only after the contingency has been removed (i.e., when tenant sales thresholds have been achieved).
	•       Hotel Revenue — income arising from the operation of the Hotel Pennsylvania which consists of rooms revenue, food and beverage revenue, and banquet revenue. Income is recognized when rooms are occupied. Food and beverage and banquet revenue is recognized when the services have been rendered.
	•       Trade Shows Revenue — income arising from the operation of trade shows, including rentals of booths. This revenue is recognized when the trade shows have occurred.
	•       Expense Reimbursements — revenue arising from tenant leases which provide for the recovery of all or a portion of the operating expenses and real estate taxes of the respective property. This revenue is accrued in the same periods as the expenses are incurred.
	•       Management, Leasing and Other Fees — income arising from contractual agreements with third parties or with partially owned entities. This revenue is recognized as the related services are performed under the respective agreements.
	•       Cleveland Medical Mart — revenue arising from the development of the Cleveland Medical Mart. This revenue was recognized as the related services were performed under the respective agreements using the criteria set forth in ASC 605-25, Multiple Element Arrangements.
Income Tax [Policy Text Block]	Income Taxes: As a limited partnership, our partners are required to report their respective share of taxable income on their individual tax returns. The provision for income taxes in our consolidated financial statements relate to certain 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 gains and losses resulting from the mark-to-market of these securities are included in “other comprehensive income (loss).” Realized gains and losses are recognized in earnings only upon the sale of the securities and are recorded based on the weighted average cost of such securities.
	We evaluate our portfolio of marketable securities for impairment each reporting period. For each of the securities in our portfolio with unrealized losses, we review the underlying cause of the decline in value and the estimated recovery period, as well as the severity and duration of the decline. In our evaluation, we consider our ability and intent to hold these investments for a reasonable period of time sufficient for us to recover our cost basis. We also evaluate the near-term prospects for each of these investments in relation to the severity and duration of the decline.
Redeemable Noncontrolling Interests Policy [Text Block]	11. Redeemable Partnership Units
	Redeemable partnership units on our consolidated balance sheets are primarily comprised of Class A 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 “partners' capital” on our consolidated balance sheets. Class A units may be tendered for redemption to us for cash; Vornado, at its 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 partnership units exclude our Series G Convertible Preferred units and Series D-13 Cumulative Redeemable Preferred units, as they are accounted for as liabilities in accordance with ASC 480, Distinguishing Liabilities and Equity, because of their possible settlement by issuing a variable number of Vornado common shares.

Basis_of_Presentation_and_Sign2

Basis of Presentation and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Basis of Presentation and Significant Accounting Policies [Abstract]
Non Cash Impairment And Other Losses [Table Text Block]		(Amounts in thousands)			For the Year Ended December 31,
					2014		2013			2012
		Impairment losses		$	-	$	-		$	6,138
		Acquisition related costs			18,435		24,857	(1)		11,248
				$	18,435	$	24,857		$	17,386
		-1	Includes a $10,949 prepayment penalty in connection with the repayment of the mortgage loan upon the acquisition of 655 Fifth Avenue.

Vornado_Capital_Partners_Real_1

Vornado Capital Partners Real Estate Fund (the "Fund") (Tables)	12 Months Ended
	Dec. 31, 2014
Real Estate Fund [Abstract]
Schedule Of Income And Loss From The Fund [Table Text Block]	(Amounts in thousands)		For the Year Ended December 31,
			2014		2013		2012
	Net investment income		$	12,895	$	8,943	$	8,575
	Net realized gains			76,337		8,184		-
	Net unrealized gains			73,802		85,771		55,361
	Income from Real Estate Fund			163,034		102,898		63,936
	Less income attributable to noncontrolling interests			-92,728		-53,427		-39,332
	Income from Real Estate Fund attributable to Vornado Realty L.P. (1)		$	70,306	$	49,471	$	24,604
	-1	Excludes $2,865, $2,992, and $3,278 of management and leasing fees in the years ended December 31, 2014, 2013 and 2012, respectively, which are included as a component of "fee and other income" on our consolidated statements of income.

Marketable_Securities_and_Deri1

Marketable Securities and Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Unrealized Gain (Loss) on Investments [Abstract]
Unrealized Gain (Loss) on Investments [Table Text Block]		Below is a summary of our marketable securities portfolio as of December 31, 2014 and 2013.
			As of December 31, 2014						As of December 31, 2013
					GAAP		Unrealized				GAAP		Unrealized
			Fair Value		Cost		Gain		Fair Value		Cost		Gain
	Equity securities:
		Lexington Realty Trust	$	202,789	$	72,549	$	130,240	$	188,567	$	72,549	$	116,018
		Other		3,534		-		3,534		3,350		59		3,291
			$	206,323	$	72,549	$	133,774	$	191,917	$	72,608	$	119,309

Investments_in_Partially_Owned1

Investments in Partially Owned Entities (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Summarized Financial Information [Table Text Block]		(Amounts in thousands)						Balance as of December 31,
		Balance Sheet:						2014			2013
			Assets					$	21,389,000		$	21,773,000
			Liabilities						17,986,000			17,982,000
			Noncontrolling interests						104,000			96,000
			Equity						3,299,000			3,695,000
					For the Year Ended December 31,
		Income Statement:			2014			2013			2012
			Total revenue		$	13,620,000		$	14,092,000		$	15,119,000
			Net (loss) income(1)			-434,000			-368,000			1,091,000
		-1	2012 includes a $600,000 net gain on sale of real estate.
Equity Method Investments [Table Text Block]										Percentage
	(Amounts in thousands)									Ownership at		As of December 31,
	Investments:									31-Dec-14		2014			2013
		Toys								32.60%		$	-		$	83,224
		Alexander’s								32.40%		$	131,616		$	167,785
		India real estate ventures								4.1%-36.5%			76,752			88,467
		Partially owned office buildings (1)								Various			760,749			621,294
		Other investments (2)								Various			277,379			288,897
												$	1,246,496		$	1,166,443
	______________________________________________________
	-1			Includes interests in 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue and others.
	-2			Includes interests in Independence Plaza, Monmouth Mall, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street and others.
							Percentage
	(Amounts in thousands)						Ownership at			For the Year Ended December 31,
	Our Share of Net (Loss) Income:						31-Dec-14			2014			2013			2012
		Toys:
			Equity in net (loss) earnings					32.60%		$	-4,691		$	-128,919		$	45,267
			Non-cash impairment losses (see page 83 for details)								-75,196			-240,757			-40,000
			Management fees								6,331			7,299			9,592
										$	-73,556		$	-362,377		$	14,859
		Alexander's:
			Equity in net income					32.40%		$	21,287		$	17,721		$	24,709
			Management, leasing and development fees								8,722			6,681			13,748
			Net gain on sale of real estate								-			-			179,934
											30,009			24,402			218,391
		India real estate ventures (1)						4.1%-36.5%			-8,309			-3,533			-5,008
		Partially owned office buildings (2)						Various			93			-4,212			-3,770
		Other investments (3)						Various			-6,368			-10,817			103,644
		LNR (see page 85 for details):
			Equity in net income					n/a			-			42,186			66,270
			Impairment loss								-			-27,231			-
			Net gain on sale								-			3,776			-
											-			18,731			66,270
		Lexington (see page 82 for details): (4)						n/a
			Equity in net loss								-			-979			-23
			Net gain resulting from Lexington's stock issuance and asset
				acquisition							-			-			28,763
											-			-979			28,740
										$	15,425		$	23,592		$	408,267
	______________________________________________________
	-1			Includes a $5,771 non-cash impairment loss in 2014.
	-2			Includes interests in 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue and others.
	-3			Includes interests in Independence Plaza, Monmouth Mall, 85 Tenth Avenue, Fashion Center Mall, 50-70 West 93rd Street and others. In the third quarter of 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.
	-4			In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable equity security - available for sale.
Schedule of debt of partially owned entities [Table Text Block]
			Below is a summary of the debt of our partially owned entities as of December 31, 2014 and 2013, none of which is recourse to us.
				Percentage				Interest
				Ownership at				Rate at		100% Partially Owned Entities’
	(Amounts in thousands)			December 31,				December 31,		Debt at December 31,
				2014		Maturity		2014		2014			2013
	Toys:
		Notes, loans and mortgages payable		32.60%		2015-2021		7.23%		$	5,748,350		$	5,702,247
	Alexander's:
		Mortgages payable		32.40%		2015-2021		2.59%		$	1,032,780		$	1,049,959
	Partially owned office buildings(1):
		Mortgages payable		Various		2015-2023		5.59%		$	3,691,274		$	3,622,759
	India Real Estate Ventures:
		TCG Urban Infrastructure Holdings mortgages
			payable	25.00%		2015-2026		13.25%		$	183,541		$	199,021
	Other(2):
		Mortgages payable		Various		2015-2023		4.33%		$	1,480,485		$	1,709,509
	-1		Includes 280 Park Avenue, 650 Madison Avenue, One Park Avenue, 666 Fifth Avenue (Office), 330 Madison Avenue and others.
	-2		Includes Independence Plaza, Monmouth Mall, Fashion Center Mall, 50-70 West 93rd Street and others.
Toys R Us [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Summarized Financial Information [Table Text Block]		(Amounts in thousands)						Balance as of
		Balance Sheet:						1-Nov-14			2-Nov-13
			Assets					$	11,267,000		$	11,756,000
			Liabilities						10,377,000			10,437,000
			Noncontrolling interests						82,000			75,000
			Toys “R” Us, Inc. equity (1)						808,000			1,244,000
					For the Twelve Months Ended
		Income Statement:			1-Nov-14			2-Nov-13			27-Oct-12
			Total revenues		$	12,645,000		$	13,046,000		$	13,698,000
			Net (loss) income attributable to Toys			-343,000			-396,000			138,000
		-1		At December 31, 2014, the carrying amount of our investment in Toys is less than our share of Toys' equity by approximately $263,455. This basis difference results primarily from non-cash impairment losses aggregating $355,953 that we have recognized through December 31, 2014. We have allocated the basis difference primarily to Toys' real estate, which is being amortized over its remaining estimated useful life.
Alexanders Inc [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Summarized Financial Information [Table Text Block]		(Amounts in thousands)								Balance as of December 31,
		Balance Sheet:								2014			2013
			Assets							$	1,423,000		$	1,458,000
			Liabilities								1,075,000			1,124,000
			Stockholders' equity								348,000			334,000
							For the Year Ended December 31,
		Income Statement:					2014			2013			2012
			Total revenues				$	201,000		$	196,000		$	191,000
			Net income attributable to Alexander’s (1)					68,000			57,000			674,000
		-1	2012 includes a $600,000 net gain on sale of real estate.

Dispositions_Tables

Dispositions (Tables)	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Schedule Of Assets And Liabilities And Results Of Operations Related To Discontinued Operations			Assets Related to				Liabilities Related to
		(Amounts in thousands)	Discontinued Operations as of				Discontinued Operations as of
			December 31,				December 31,
			2014		2013		2014		2013
		Retail	$	2,238,474	$	2,497,918	$	1,511,362	$	1,441,853
		New York		-		138,162		-		-
		Total	$	2,238,474	$	2,636,080	$	1,511,362	$	1,441,853
		(Amounts in thousands)			For the Year Ended December 31,
					2014		2013		2012
		Total revenues			$	394,056	$	499,964	$	581,392
		Total expenses				275,828		312,675		418,653
						118,228		187,289		162,739
		Net gains on sales of real estate				507,192		414,502		245,799
		Impairment losses				-41,474		-37,170		-127,839
		Gain on sale of Canadian Trade Shows, net of $11,448 of income taxes				-		-		19,657
		Gain on sale of assets other than real estate				-		1,377		8,491
		Income from discontinued operations			$	583,946	$	565,998	$	308,847

Identified_Intangible_Assets_a1

Identified Intangible Assets and Intangible Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Finite-Lived Intangible Assets And Liabilities [Line Items]
Schedule of Identified Intangible Assets and Intangible Liabilities (Table)			Balance as of December 31,
		(Amounts in thousands)	2014		2013
		Identified intangible assets:
		Gross amount	$	424,976	$	505,203
		Accumulated amortization		-199,821		-252,121
		Net	$	225,155	$	253,082
		Identified intangible liabilities (included in deferred revenue):
		Gross amount	$	657,976	$	622,685
		Accumulated amortization		-329,775		-295,768
		Net	$	328,201	$	326,917
Below Market Leases Net Of Above Market Leases [Member]
Finite-Lived Intangible Assets And Liabilities [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]		(Amounts in thousands)
		2015	$	49,550
		2016		37,894
		2017		35,069
		2018		34,166
		2019		23,928
Other Identified Intangible Assets [Member]
Finite-Lived Intangible Assets And Liabilities [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]		(Amounts in thousands)
		2015	$	25,735
		2016		20,122
		2017		16,619
		2018		12,417
		2019		10,470
Tenant Under Ground Leases [Member]
Finite-Lived Intangible Assets And Liabilities [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]		(Amounts in thousands)
		2015	$	1,832
		2016		1,832
		2017		1,832
		2018		1,832
		2019		1,832

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Debt						Weighted Average
						Interest Rate at			Balance at December 31,
		(Amounts in thousands)				31-Dec-14			2014		2013
		Mortgages Payable:
			Fixed rate				4.46%	$	6,499,396	$	6,439,371
			Variable rate				2.20%		1,763,769		691,860
							3.98%	$	8,263,165	$	7,131,231
		Unsecured Debt:
			Senior unsecured notes				3.89%	$	1,347,159	$	1,350,855
			Unsecured revolving credit facilities				-		-		295,870
							3.89%	$	1,347,159	$	1,646,725
Schedule of Maturities of Long-Term Debt Table Text Block							Senior Unsecured
							Debt and
		(Amounts in thousands)					Revolving Credit
		Year Ending December 31,			Mortgages Payable		Facilities
		2015		$	407,229	$	500,000
		2016			1,399,378		-
		2017			609,680		-
		2018			240,674		-
		2019			979,197		450,000
		Thereafter			4,624,897		400,000

Redeemable_Partnership_Units_T

Redeemable Partnership Units (Tables)	12 Months Ended
	Dec. 31, 2014
Redeemable Noncontrolling Interests [Abstract]
Operating Partnership Units Held By Third Parties
	(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			2014			2013	2014	2013	Preference		Rate
	Common:
		Class A units held by third parties		$	1,336,780	$	1,002,620	11,356,550	11,292,038		n/a	$	2.92
	Redeemable Preferred: (1)
		5.00% D-16 Cumulative Redeemable		$	1,000	$	1,000	1	1	$	1,000,000.00	$	50,000.00
	-1	Holders may tender units for redemption to us for cash at their stated redemption amount; Vornado, at its 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 any time.
Summary Of Activity Of Redeemable Noncontrolling Interests	Below is a table summarizing the activity of redeemable partnership units.
		(Amounts in thousands)
		Balance at December 31, 2012	$	944,152
		Net income		24,817
		Other comprehensive income		5,296
		Distributions		-34,053
		Redemption of Class A units, at redemption value		-25,317
		Adjustments to carry redeemable Class A units at redemption value		108,252
		Redemption of Series D-15 redeemable units		-36,900
		Other, net		17,373
		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, 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

Partners_Capital_Tables

Partners' Capital (Tables)	12 Months Ended
	Dec. 31, 2014
Partner's Capital [Abstract]
Schedule Of Preferred Units [Table Text Block]	(Amounts in thousands, except unit and		Balance as of						Units Outstanding at			Per Unit		Annual
	per unit amounts)		December 31,						December 31,			Liquidation		Distribution
	Preferred Units		2014			2013			2014		2013	Preference		Rate(1)
	Convertible Preferred:
		6.5% Series A: authorized 83,977 units(2)	$	1,393		$	1,592		28,939		32,807	$	50	$	3.25
	Cumulative Redeemable:
		6.625% Series G: authorized 8,000,000 units(3)		193,135			193,135		8,000,000		8,000,000	$	25	$	1.65625
		6.625% Series I: authorized 10,800,000 units(3)		262,379			262,379		10,800,000		10,800,000	$	25	$	1.65625
		6.875% Series J: authorized 9,850,000 units(3)		238,842			238,842		9,850,000		9,850,000	$	25	$	1.71875
		5.70% Series K: authorized 12,000,000 units(3)		290,971			290,971		12,000,000		12,000,000	$	25	$	1.425
		5.40% Series L: authorized 12,000,000 units(3)		290,306			290,306		12,000,000		12,000,000	$	25	$	1.35
			$	1,277,026		$	1,277,225		52,678,939		52,682,807
	-1	Distributions on preferred units are cumulative and are payable quarterly in arrears.
	-2	Redeemable at the option of Vornado under certain circumstances, at a redemption price of 1.4334 Class A units per Series A Preferred unit plus accrued and unpaid distributions through the date of redemption, or convertible at any time at the option of the holder for 1.4334 Class A units per Series A Preferred unit.
	-3	Redeemable at Vornado's option at a redemption price of $25.00 per unit, plus accrued and unpaid distributions through the date of redemption.
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]				For the Year Ended December 31, 2014
							Securities			Pro rata share of		Interest
							available-			nonconsolidated		rate
	(Amounts in thousands)			Total			for-sale			subsidiaries' OCI		swap		Other
	Balance as of December 31, 2013			$	71,537		$	119,309		$	-11,501	$	-31,882	$	-4,389
	Net current period OCI				21,730			14,465			2,509		6,079		-1,323
	Balance as of December 31, 2014			$	93,267		$	133,774		$	-8,992	$	-25,803	$	-5,712

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
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]				As of December 31, 2014
	(Amounts in thousands)			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		$	-
				As of December 31, 2013
	(Amounts in thousands)			Total			Level 1			Level 2			Level 3
		Marketable securities		$	191,917		$	191,917		$	-		$	-
		Real Estate Fund investments (75% of which is attributable to
			noncontrolling interests)		667,710			-			-			667,710
		Deferred compensation plan assets (included in other assets)			116,515			47,733			-			68,782
			Total assets	$	976,142		$	239,650		$	-		$	736,492
		Mandatorily redeemable instruments (included in other liabilities)		$	55,097		$	55,097		$	-		$	-
		Interest rate swap (included in other liabilities)			31,882			-			31,882			-
			Total liabilities	$	86,979		$	55,097		$	31,882		$	-
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 17.5%		13.70%
			Terminal capitalization rates				4.7% to 6.5%		5.30%
Non-financial Assets Measured at Fair Value on a Nonrecurring Basis [Table Text Block]					As of December 31, 2014
		(Amounts in thousands)			Total			Level 1			Level 2			Level 3
			Real estate assets		$	4,848		$	-		$	-		$	4,848
					As of December 31, 2013
		(Amounts in thousands)			Total			Level 1			Level 2			Level 3
			Real estate assets		$	354,341		$	-		$	-		$	354,341
			Investment in Toys			83,224			-			-			83,224
				Total assets	$	437,565		$	-		$	-		$	437,565
Schedule Of Carrying Amounts And Fair Values Of Financial Instruments [Table Text Block]						As of December 31, 2014						As of December 31, 2013
						Carrying			Fair			Carrying			Fair
		(Amounts in thousands)				Amount			Value			Amount			Value
				Cash equivalents		$	749,418		$	749,000		$	295,000		$	295,000
				Mortgage and mezzanine loans receivable
					(included in other assets)		16,748			17,000			170,972			171,000
						$	766,166		$	766,000		$	465,972		$	466,000
			Debt:
				Mortgages payable		$	8,263,165		$	8,224,000		$	7,131,231		$	6,903,000
				Senior unsecured notes			1,347,159			1,385,000			1,350,855			1,402,000
				Revolving credit facility debt			-			-			295,870			296,000
						$	9,610,324		$	9,609,000		$	8,777,956		$	8,601,000
Real Estate Fund [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Summary of Changes in Level 3 Plan Assets [Table Text Block]					Real Estate Fund Investments
					For The Year Ended December 31,
		(Amounts in thousands)			2014			2013
		Beginning balance			$	667,710		$	600,786
		Purchases				3,392			43,816
		Dispositions / Distributions				-307,268			-70,848
		Net unrealized gains				73,802			85,771
		Net realized gains				76,337			8,184
		Other, net				-			1
		Ending balance			$	513,973		$	667,710
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]					Deferred Compensation Plan Assets
					For The Year Ended December 31,
		(Amounts in thousands)			2014			2013
		Beginning balance			$	68,782		$	62,631
		Purchases				14,162			5,018
		Sales				-24,951			-7,306
		Realized and unrealized gains				3,415			7,189
		Other, net				1,907			1,250
		Ending balance			$	63,315		$	68,782

Stockbased_Compensation_Tables

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
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, 2014		3,248,699		$	67.51
		Granted		49,088			91.32
		Exercised		-434,204			67.27
		Cancelled or expired		-43,468			104.74
		Outstanding at December 31, 2014		2,820,115		$	67.38		4.6	$	145,317,000
		Options vested and expected to vest at
			31-Dec-14	2,818,587		$	67.37		4.6	$	145,271,000
		Options exercisable at December 31, 2014		2,606,260		$	65.62		4.4	$	138,912,000
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Table Text Block]			December 31,
			2014		2013		2012
		Expected volatility	36.00%		36.00%		36.00%
		Expected life	5.0 years		5.0 years		5.0 years
		Risk free interest rate	1.81%		0.91%		1.05%
		Expected dividend yield	4.10%		4.30%		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, 2014		29,664		$	79.24
			Granted		11,475			91.31
			Vested		-15,733			74.61
			Cancelled or expired		-2,957			87.42
			Unvested at December 31, 2014		22,449			87.58
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, 2014		765,971		$	76.27
			Granted		226,638			86.79
			Vested		-327,555			69.48
			Cancelled or expired		-6,575			83.16
			Unvested at December 31, 2014		658,479			83.2

Fee_and_Other_Income_Tables

Fee and Other Income (Tables)	12 Months Ended
	Dec. 31, 2014
Fee And Other Income Tables [Abstract]
Fee and Other Income (Table)
	(Amounts in thousands)		For the Year Ended December 31,
			2014		2013		2012
	BMS cleaning fees		$	85,658	$	66,505	$	67,584
	Management and leasing fees			19,905		23,073		18,718
	Lease termination fees(1)			16,362		32,630		2,287
	Other income			33,281		33,363		30,488
			$	155,206	$	155,571	$	119,077
	__________________________
	-1	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_Investment_1

Interest and Other Investment Income (Loss), Net (Tables)	12 Months Ended
	Dec. 31, 2014
Interest and Other Investment (Loss) Income, net [Abstract]
Schedule Of Interest And Other Investment Income Net [Table Text Block]
	(Amounts in thousands)		For the Year Ended December 31,
			2014		2013		2012
	Dividends and interest on marketable securities		$	12,707	$	11,446	$	11,979
	Mark-to-market of investments in our deferred compensation plan (1)			11,557		10,636		6,809
	Interest on mezzanine loans receivable			3,920		19,495		13,861
	Losses from the disposition of investment in J.C. Penney			-		-72,974		-300,752
	Other, net			10,568		6,510		6,903
			$	38,752	$	-24,887	$	-261,200
	__________________________
	-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, 2014
Interest Expense Debt [Abstract]
Interest And Debt Expense [Table Text Block]
	(Amounts in thousands)	For the Year Ended December 31,
		2014		2013		2012
	Interest expense	$	430,278	$	444,412	$	427,147
	Amortization of deferred financing costs		45,263		23,673		20,889
	Capitalized interest and debt expense		-62,786		-42,303		-16,801
		$	412,755	$	425,782	$	431,235

Income_Per_Class_A_Unit_Tables

Income Per Class A Unit (Tables)	12 Months Ended
	Dec. 31, 2014
Income Per Class A Unit [Abstract]
Schedule Of Earnings Per Share Basic And Diluted [Text Block]
	(Amounts in thousands, except per unit amounts)			Year Ended December 31,
				2014		2013		2012
	Numerator:
		Income (loss) from continuing operations, net of income attributable to
			noncontrolling interests	$	328,519	$	-62,146	$	351,979
		Income from discontinued operations, net of income attributable to noncontrolling
			interests		583,946		562,934		310,544
		Net income attributable to Vornado Realty L.P.			912,465		500,788		662,523
		Preferred unit distributions			-81,514		-83,965		-86,873
		Preferred unit redemptions			-		-1,130		8,948
		Net income attributable to Class A unitholders			830,951		415,693		584,598
		Earnings allocated to unvested participating securities			-4,260		-2,705		-3,413
		Numerator for basic income per Class A unit			826,691		412,988		581,185
		Impact of assumed conversions:
			Convertible preferred unit distributions		97		-		113
		Numerator for diluted income per Class A unit		$	826,788	$	412,988	$	581,298
	Denominator:
		Denominator for basic income per Class A unit – weighted average units			198,213		197,551		197,082
		Effect of dilutive securities (1):
			Vornado stock options and restricted unit awards		1,557		1,092		1,002
			Convertible preferred units		43		-		50
		Denominator for diluted income per Class A unit – weighted average units and
			assumed conversions		199,813		198,643		198,134
	INCOME (LOSS) PER CLASS A UNIT – BASIC:
		Income (loss) from continuing operations, net		$	1.22	$	-0.76	$	1.37
		Income from discontinued operations, net			2.95		2.85		1.58
		Net income per Class A unit		$	4.17	$	2.09	$	2.95
	INCOME (LOSS) PER CLASS A UNIT – DILUTED:
		Income (loss) from continuing operations, net		$	1.22	$	-0.75	$	1.36
		Income from discontinued operations, net			2.92		2.83		1.57
		Net income per Class A unit		$	4.14	$	2.08	$	2.93
	-1		The effect of dilutive securities in the years ended December 31, 2014, 2013 and 2012 excludes an aggregate of 116, 818 and 2,796 weighted average Class A unit equivalents, respectively, as their effect was anti-dilutive.

Leases_Tables

Leases (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Schedule Of Future Base Rental [Table Text Block]
		(Amounts in thousands)
		Year Ending December 31:
		2015	$	1,564,200
		2016		1,509,781
		2017		1,470,810
		2018		1,395,708
		2019		1,236,840
		Thereafter		6,990,557
Schedule Of Future Minimum Rental Payments For Operating Leases [Table Text Block]
		(Amounts in thousands)
		Year Ending December 31:
		2015	$	29,060
		2016		29,575
		2017		31,141
		2018		31,629
		2019		32,136
		Thereafter		1,208,483
Schedule Of Future Minimum Lease Payments For Capital Leases [Table Text Block]
		(Amounts in thousands)
		Year Ending December 31:
		2015	$	12,500
		2016		12,500
		2017		12,500
		2018		12,500
		2019		12,500
		Thereafter		334,792
		Total minimum obligations		397,292
		Interest portion		-157,292
		Present value of net minimum payments	$	240,000

Summary_of_Quarterly_Results_T

Summary of Quarterly Results (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Data [Abstract]
Schedule Of Quarterly Financial Information Table Text Block							Net Income (Loss)
							Attributable		Net Income (Loss) Per
							to Class A		Class A Unit (2)
		(Amounts in thousands, except per unit amounts)			Revenues		Unitholders (1)		Basic		Diluted
			2014
				31-Dec	$	597,010	$	544,287	$	2.73	$	2.71
				30-Sep		578,710		139,134		0.7		0.69
				30-Jun		574,411		81,333		0.41		0.4
				31-Mar		562,381		66,197		0.33		0.33
			2013
				31-Dec	$	570,977	$	-73,042	$	-0.37	$	-0.37
				30-Sep		578,322		88,037		0.44		0.44
				30-Jun		582,258		154,775		0.78		0.78
				31-Mar		567,619		245,923		1.24		1.23
	_______________________________
		-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, 2014
Segment Reporting [Abstract]
Schedule of Segment Information
	(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, including Toys					-58,131		20,701			-3,677			-75,155
	Income from Real Estate Fund					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					434,361		418,364			100,243			-84,246
	Income tax expense					-9,281		-4,305			-242			-4,734
	Income (loss) from continuing operations					425,080		414,059			100,001			-88,980
	Income from discontinued operations					583,946		463,163			-			120,783
	Net income					1,009,026		877,222			100,001			31,803
	Less net income attributable to noncontrolling interests in
		consolidated subsidiaries				-96,561		-8,626			-			-87,935
	Net income (loss) attributable to Vornado Realty L.P.					912,465		868,596			100,001			-56,132
	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)				$	2,277,084	$	1,439,189	(3)	$	335,590	(4)	$	502,305	(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					1,246,496		1,036,130			102,635			107,731
	Total assets					21,248,320		10,752,763			4,310,974			6,184,583
	See notes on pages 111 and 112.
	(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, including Toys					-338,785		15,527			-6,968			-347,344
	Income from Real Estate Fund					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					-9,975		399,327			84,359			-493,661
	Income tax benefit (expense)					8,717		-2,794			14,031			-2,520
	(Loss) income from continuing operations					-1,258		396,533			98,390			-496,181
	Income from discontinued operations					565,998		160,314			-			405,684
	Net income (loss)					564,740		556,847			98,390			-90,497
	Less net income attributable to noncontrolling interests in
		consolidated subsidiaries				-63,952		-10,786			-			-53,166
	Net income (loss) attributable to Vornado Realty L.P.					500,788		546,061			98,390			-143,663
	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)				$	2,018,697	$	1,079,682	(3)	$	341,223	(4)	$	597,792	(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					1,249,667		904,278			100,543			244,846
	Total assets					20,097,224		9,255,964			4,107,636			6,733,624
	See notes on page 111 and 112.
	(Amounts in thousands)			For the Year Ended December 31, 2012
					Total		New York			Washington, DC			Other
	Total revenues				$	2,332,724	$	1,319,470		$	554,028		$	459,226
	Total expenses					1,738,381		835,563			360,056			542,762
	Operating income (loss)					594,343		483,907			193,972			-83,536
	Income (loss) from partially owned entities, including Toys					423,126		207,773			-5,612			220,965
	Income from Real Estate Fund					63,936		-			-			63,936
Interest and other investment (loss) income, net					-261,200		4,002			126			-265,328
Interest and debt expense					-431,235		-146,350			-115,574			-169,311
Net gain on disposition of wholly owned and partially
	owned assets				4,856		-			-			4,856
Income (loss) before income taxes					393,826		549,332			72,912			-228,418
Income tax expense					-8,132		-3,491			-1,650			-2,991
Income (loss) from continuing operations					385,694		545,841			71,262			-231,409
Income from discontinued operations					308,847		30,293			167,766			110,788
Net income (loss)					694,541		576,134			239,028			-120,621
Less net income attributable to noncontrolling interests in
	consolidated subsidiaries				-32,018		-2,138			-			-29,880
Net income (loss) attributable to Vornado Realty L.P.					662,523		573,996			239,028			-150,501
Interest and debt expense(2)					760,523		187,855			133,625			439,043
Depreciation and amortization(2)					735,293		252,257			157,816			325,220
Income tax expense (2)					7,026		3,751			1,943			1,332
EBITDA(1)				$	2,165,365	$	1,017,859	(3)	$	532,412	(4)	$	615,094	(5)
Balance Sheet Data:
Real estate at cost				$	15,287,078	$	8,687,141		$	4,171,879		$	2,428,058
Investments in partially owned entities					1,704,297		576,336			95,670			1,032,291
Total assets					22,065,049		9,215,438			4,196,694			8,652,917
See notes on page 111 and 112.
	Notes to preceding tabular information:
-1	EBITDA represents "Earnings Before Interest, Taxes, Depreciation and Amortization." We consider EBITDA a supplemental measure for making decisions and assessing the unlevered performance of our segments as it relates to the total return on assets as opposed to the levered return on equity. As properties are bought and sold based on a multiple of EBITDA, we utilize this measure to make investment decisions as well as to compare the performance of our assets to that of our peers. EBITDA should not be considered a substitute for net income. EBITDA may not be comparable to similarly titled measures employed by other companies.
-2	Interest and debt expense, depreciation and amortization and income tax expense (benefit) in the reconciliation of net income (loss) to EBITDA includes our share of these items from partially owned entities.
-3	The elements of "New York" EBITDA are summarized below.
						For the Year Ended December 31,
	(Amounts in thousands)					2014			2013			2012
	Office(a)					$	1,085,262		$	759,941		$	568,518
	Retail						281,428			246,808			189,484
	Alexander's(b)						41,746			42,210			231,402
	Hotel Pennsylvania						30,753			30,723			28,455
		Total New York				$	1,439,189		$	1,079,682		$	1,017,859
	(a)		2014 and 2013 includes $440,537 and $127,512 net gains on sale of real estate, respectively.
	(b)		2012 includes $179,934 for our share of net gain on sale of Kings Plaza.
-4	The elements of "Washington, DC" EBITDA are summarized below.
						For the Year Ended December 31,
	(Amounts in thousands)					2014			2013			2012
	Office, excluding the Skyline Properties (a)					$	266,859		$	268,373		$	449,448
	Skyline properties						27,150			29,499			40,037
		Total Office					294,009			297,872			489,485
	Residential						41,581			43,351			42,927
		Total Washington, DC				$	335,590		$	341,223		$	532,412
	(a)		2012 includes $163,367 of net gains on sale of real estate.
Details of Other EBITDA (Table)
		Notes to preceding tabular information:
	-5	The elements of "other" EBITDA from continuing operations are summarized below.
		(Amounts in thousands)					For the Year Ended December 31,
							2014			2013				2012
		Our share of Real Estate Fund:
			Income before net realized/unrealized gains				$	8,056		$	7,752		$	6,385
			Net realized/unrealized gains on investments					37,535			23,489			13,840
			Carried interest					24,715			18,230			4,379
		Total						70,306			49,471			24,604
		Our share of Toys "R" Us						103,632			-12,081			281,289
		The Mart and trade shows						79,636			74,270			62,470
		555 California Street						48,844			42,667			46,167
		India real estate ventures						6,434			5,841			3,654
		LNR(a)						-			20,443			75,202
		Lexington(b)						-			6,931			32,595
		Other investments						26,586			28,505			25,103
								335,438			216,047			551,084
		Corporate general and administrative expenses(c)						-94,929			-94,904			-89,082
		Investment income and other, net(c)						31,665			46,525			45,563
		Urban Edge Properties and residual retail properties discontinued operations(d)						235,989			531,493			201,035
		Acquisition and transaction related costs, and impairment losses						-16,392			-24,857			-17,386
		Net gain on sale of marketable securities, land parcels and residential
			condominiums					13,568			56,868			4,856
		Our share of debt satisfaction gains and net gains on sale of real estate
			of partially owned entities					13,000			-			-
		Suffolk Downs impairment loss and loan reserve						-10,263			-			-
		Our share of impairment losses of partially owned entities						-5,771			-			-4,936
		Losses from the disposition of investment in J.C. Penney						-			-127,888			-300,752
		Severance costs (primarily reduction in force at the Mart)						-			-5,492			-3,005
		Purchase price fair value adjustment and accelerated amortization of
			discount on investment in subordinated debt of Independence Plaza					-			-			105,366
		The Mart discontinued operations						-			-			93,588
		Net gain resulting from Lexington's stock issuance and asset acquisition						-			-			28,763
							$	502,305		$	597,792		$	615,094
		(a)		On April 19, 2013, LNR was sold.
		(b)		In the first quarter of 2013, we began accounting for our investment in Lexington as a marketable equity security - available for sale. This investment was previously accounted for under the equity method (see page 82 for details).
		(c)		The amounts in these captions (for this table only) exclude income/expense from the mark-to-market of our deferred compensation plan of $11,557, $10,636 and $6,809 for the years ended December 31, 2014, 2013 and 2012, respectively.
		(d)		The year ended December 31, 2014, includes $14,956 of transaction costs related to the spin-off of our strip shopping centers and malls.

Organization_and_Business_Deta

Organization and Business (Details) (USD $)	12 Months Ended	0 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Jan. 15, 2015	Dec. 31, 2013	Dec. 31, 2012
			Properties	Properties
Organization and Business [Abstract]
Common limited partnership interest in the Operating Partnership	94.10%
Toys R Us [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage	32.60%
Alexanders Inc [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage	32.40%
Retail Segment Strip Shopping Centers [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties	22
Number Of Real Estate Properties Sold	6
Subsequent Event [Member] | Toys R Us [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage		32.60%
Subsequent Event [Member] | Vornado Realty Trust [Member]
Real Estate Properties [Line Items]
Number of shares/units convered during spin off for 1 share of UE		2
Subsequent Event [Member] | Urban Edge Properties [Member]
Real Estate Properties [Line Items]
Cash Considerations Transferred During Spin Off (in US Dollars)		225
Partnership Units received during spin off		5,712,000
Duration Of Administrative Services		2 years
Number of new shares issued during spin off for every 2 shares/units of Vornado and Vornado L.P.		1
Equity method ownership percentage		5.40%
Subsequent Event [Member] | Urban Edge Properties [Member] | Retail Segment Strip Shopping Centers [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		79
Subsequent Event [Member] | Urban Edge Properties [Member] | Retail Segment Regional Malls [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		3
Subsequent Event [Member] | Vornado Realty L.P. [Member]
Real Estate Properties [Line Items]
Number of shares/units convered during spin off for 1 share of UE		2
Real Estate Fund [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Equity method ownership percentage		25.00%
New York Segment [Member] | Subsequent Event [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] | Subsequent Event [Member] | Alexanders Inc [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		6
New York Segment [Member] | New York City Metropolitan Area [Member] | Lexington Avenue 731 [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Square Footage Of Real Estate Property		1,300,000
Retail Properties Segment [Member] | Retail Segment Strip Shopping Centers [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties Sold			12	12
Warehouse [Member] | Subsequent Event [Member] | Urban Edge Properties [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		1
Office Building [Member] | San Francisco [Member] | Other Properties 555 California Street [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		3
Square Footage Of Real Estate Property		1,800,000
Contolling Interest In Real Estate Properties Percent		70.00%
Office Building [Member] | New York Segment [Member] | Manhattan [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		31
Square Footage Of Real Estate Property		20,100,000
Office Building [Member] | Washington DC Segment [Member] | Washington Dc Northern Virginia [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		59
Square Footage Of Real Estate Property		16,100,000
Retail Properties [Member] | New York Segment [Member] | Manhattan [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		56
Square Footage Of Real Estate Property		2,500,000
Merchandise Mart Properties [Member] | Merchandise Mart IL Chicago [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Square Footage Of Real Estate Property		3,600,000
Other Real Estate And Related Investments [Member] | New York Segment [Member] | Manhattan [Member] | Hotel Pennsylvania [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number of Units in Real Estate Property (in number of residential units)/ (in number of rooms)		1,700
Residential Properties [Member] | New York Segment [Member] | Manhattan [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		4
Number of Units in Real Estate Property (in number of residential units)/ (in number of rooms)		1,654
Residential Properties [Member] | Washington DC Segment [Member] | Washington Dc Northern Virginia [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties		7
Number of Units in Real Estate Property (in number of residential units)/ (in number of rooms)		2,414

Basis_of_Presentation_and_Sign3

Basis of Presentation and Significant Accounting Policies (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 15, 2015
				Properties
Basis of Presentation and Significant Accounting Policies [Abstract]
Reclassification of signage revenue from fee and other income to property rentals	$37,929	$32,866	$20,892
Property Plant And Equipment [Line Items]
Interest Costs Capitalized	$62,786	$42,303
Retail Segment Strip Shopping Centers [Member] | Urban Edge Properties [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties				79
Retail Segment Regional Malls [Member] | Urban Edge Properties [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties				3
Warehouse [Member] | Urban Edge Properties [Member] | Subsequent Event [Member]
Real Estate Properties [Line Items]
Number Of Real Estate Properties				1
Maximum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	40 years
Minimum [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment Useful Life	7 years

Basis_of_Presentation_and_Sign4

Basis of Presentation and Significant Accounting Policies (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Equity Method Investments [Line Items]
Acquisition and transaction related costs, and impairment losses	$18,435	$24,857	$17,386
Significant Policies Other Details [Abstract]
Tenant and other receivables, allowance for doubtful accounts (in US dollars)	12,210	14,519
Receivables Arising From Straight Lining Of Rents Allowance	3,188	4,355
Impairment Loss [Member]
Schedule Of Equity Method Investments [Line Items]
Acquisition and transaction related costs, and impairment losses	0	0	6,138
Acquisitions related costs [Member]
Schedule Of Equity Method Investments [Line Items]
Acquisition and transaction related costs, and impairment losses	18,435	24,857	11,248
Acquisitions related costs [Member] | New York 655 Fifth Avenue [Member]
Schedule Of Equity Method Investments [Line Items]
Penalty on early repayment of loan	10,949
Equity Method Investments [Member]
Schedule Of Equity Method Investments [Line Items]
Other than Temporary Impairment Losses Investments	85,459	281,098	44,936
Toys R Us [Member] | Impairment Loss [Member]
Schedule Of Equity Method Investments [Line Items]
Other than Temporary Impairment Losses Investments	$75,196	$240,757	$40,000

Basis_of_Presentation_and_Sign5

Basis of Presentation and Significant Accounting Policies (Details 2) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Tax Treatment Of Dividend [Line Items]
Minimum Percentage of Taxable Income Distributed As Dividends									90.00%
Deferred Tax Assets, Valuation Allowance	$94,100				$87,800				$94,100	$87,800
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Line Items]
Net income attributable to Class A unitholders	544,287	139,134	81,333	66,197	-73,042	88,037	154,775	245,923	830,951	415,693	584,598
Income Tax Liability Relating to Taxable REIT Subsidiaries Current									$10,777	$9,608	$20,336
Ordinary Income [Member]
Tax Treatment Of Dividend [Line Items]
Percentage Of Taxable Income Distributed									100.00%		62.70%
Long Term Capital Gain [Member]
Tax Treatment Of Dividend [Line Items]
Percentage Of Taxable Income Distributed											37.30%

Vornado_Capital_Partners_Real_2

Vornado Capital Partners Real Estate Fund (the "Fund") (Narratives) (Details) (USD $)	12 Months Ended		0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Aug. 21, 2014	Jun. 26, 2014	Jan. 20, 2015
	Investments	Investments	sqft
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)	$513,973	$667,710
Mortgages payable (in US Dollars)	8,263,165	7,131,231
Unfunded Commitments Of Fund	36,031
Real Estate Fund [Member]
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)	513,973	667,710
Term of the Fund, years	8 years
Investment period for commitments of the Fund, years	3 years
Number Of Investments Held By Fund	7	9
Excess of fair value over cost	176,899
Unfunded Commitments Of Fund	144,123
Real Estate Fund [Member] | Subsequent Event [Member]
Investment Holdings [Line Items]
Equity method ownership percentage					25.00%
Number Of Limited Partners					1
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			305,000
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]
Investment Holdings [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)				560,000
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%
Crowne Plaza Time Square Hotel [Member]
Investment Holdings [Line Items]
Equity method ownership percentage	11.00%
Crowne Plaza Time Square Hotel [Member] | Subsequent Event [Member]
Investment Holdings [Line Items]
Equity method ownership percentage					33.00%
Crowne Plaza Time Square Hotel [Member] | Real Estate Fund [Member] | Subsequent Event [Member]
Investment Holdings [Line Items]
Mortgages payable (in US Dollars)					310,000
Debt Instrument, Description of Variable Rate Basis					LIBOR
Spread Over LIBOR (in percentage)					2.80%
Debt Instrument Maturity					Dec-18
Length Of Extension Available					1 year
Crowne Plaza Time Square Hotel [Member] | Real Estate Fund Joint Venture [Member] | Subsequent Event [Member]
Investment Holdings [Line Items]
Equity method ownership percentage					57.00%
Aggregate fair value of Real Estate Fund investments (in US Dollars)					480,000
Business Acquisition Cost Of Acquired Entity					95,000
Crowne Plaza Time Square Hotel [Member] | Vornado Realty Trust [Member] | Subsequent Event [Member]
Investment Holdings [Line Items]
Business Acquisition Cost Of Acquired Entity					$39,000

Vornado_Capital_Partners_Real_3

Vornado Capital Partners Real Estate Fund (the "Fund") (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Details Of Income From Real Estate Funds [Abstract]
Income from Real Estate Fund	$163,034	$102,898	$63,936
Less income attributable to noncontrolling interests	-96,561	-63,952	-32,018
Income From Real Estate Fund Attributable To Vornado	70,306	49,471	24,604
Fee And Other Income	155,206	155,571	119,077
Real Estate Fund [Member]
Details Of Income From Real Estate Funds [Abstract]
Less income attributable to noncontrolling interests	-92,728	-53,427	-39,332
Fee And Other Income	2,865	2,992	3,278
Net investment income [Member] | Real Estate Fund [Member]
Details Of Income From Real Estate Funds [Abstract]
Income from Real Estate Fund	12,895	8,943	8,575
Net realized gains [Member] | Real Estate Fund [Member]
Details Of Income From Real Estate Funds [Abstract]
Income from Real Estate Fund	76,337	8,184	0
Net realized/unrealized gains on investments [Member] | Real Estate Fund [Member]
Details Of Income From Real Estate Funds [Abstract]
Income from Real Estate Fund	$73,802	$85,771	$55,361

Acquisitions_Narratives_Detail

Acquisitions (Narratives) (Details) (USD $)	0 Months Ended
In Thousands, unless otherwise specified	Aug. 01, 2014	Oct. 28, 2014	Nov. 21, 2014	Dec. 31, 2014	Dec. 31, 2013	Jan. 20, 2015
			Story			LimitedPartners
			sqft
Business Acquisition [Line Items]
Mortgages payable				$8,263,165	$7,131,231
Subsequent Event [Member] | Real Estate Fund [Member]
Business Acquisition [Line Items]
Equity method ownership percentage						25.00%
Number Of Limited Partners						1
Lexington Avenue 715 Retail [Member] | New York Segment [Member]
Business Acquisition [Line Items]
Business Acquisition Cost Of Acquired Entity	63,000
St Regis Hotel [Member] | Retail Properties [Member]
Business Acquisition [Line Items]
Business Acquisition Cost Of Acquired Entity		700,000
St Regis Hotel [Member] | Retail Properties [Member] | Joint Venture [Member]
Business Acquisition [Line Items]
Equity method ownership percentage		74.30%
Center Building [Member] | New York Segment [Member] | Office Building [Member]
Business Acquisition [Line Items]
Business Acquisition Cost Of Acquired Entity			142,000
Square Footage Of Real Estate Property			437,000
Number Of Story In Office Tower			8
Lease Percentage Of Property			98.00%
Mortgages payable			62,000
Interest Rate, End of Period (in percentage)			4.43%
Debt Instrument Maturity			Oct-18
Non Refundable Deposit			$14,200
Crowne Plaza Time Square Hotel [Member] | Subsequent Event [Member] | Real Estate Fund [Member]
Business Acquisition [Line Items]
Number Of Limited Partners						1
Crowne Plaza Time Square Hotel [Member] | New York Segment [Member] | Joint Venture [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Equity method ownership percentage						57.00%

Marketable_Securities_and_Deri2

Marketable Securities and Derivative Instruments: Derivative Instruments (Narratives) (Details) (USD $)	12 Months Ended			0 Months Ended	3 Months Ended	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 19, 2013	Mar. 31, 2013	Sep. 30, 2013
Derivative [Line Items]
Proceeds from sales of, and return of investment in, marketable securities	$0	$378,709	$60,258
JC Penney [Member]
Summary Of Derivative Instruments [Abstract]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities					39,487
Derivative [Line Items]
Closing share price (in dollars per share)					$15.11	$14.29
Impairment loss					39,487
Loss from the mark-to-market of J.C. Penney derivative position				33,487
Net loss on sale of common shares in J.C Penney						54,914
Sale of Stock, Number of Shares						23,400,000
Proceeds from sales of, and return of investment in, marketable securities						334,500
Lexington Realty Trust [Member] | Maximum [Member]
Derivative [Line Items]
Ownership Percentage					17.20%
Lexington Realty Trust [Member] | Minimum [Member]
Derivative [Line Items]
Ownership Percentage					8.80%
Other Investments [Member]
Derivative [Line Items]
Marketable Securities Gain (Loss)		31,741	3,582
Proceeds from sales of, and return of investment in, marketable securities		$44,209	$58,718
Shares Owned [Member] | JC Penney [Member]
Derivative [Line Items]
Ownership common shares, investee (in shares)					8,584,010
Common Shares [Member] | JC Penney [Member]
Derivative [Line Items]
Receipt of common shares by settling forward contract				4,815,990

Marketable_Securities_and_Deri3

Marketable Securities and Derivative Instruments: Marketable Securities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	$206,323	$191,917
Available-for-sale Equity Securities, Amortized Cost Basis	72,549	72,608
Available-for-sale Securities, Gross Unrealized Gain (Loss)	133,774	119,309
Lexington Realty Trust [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	202,789	188,567
Available-for-sale Equity Securities, Amortized Cost Basis	72,549	72,549
Available-for-sale Securities, Gross Unrealized Gain (Loss)	130,240	116,018
Other Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Equity Securities	3,534	3,350
Available-for-sale Equity Securities, Amortized Cost Basis	0	59
Available-for-sale Securities, Gross Unrealized Gain (Loss)	$3,534	$3,291

Investments_in_Partially_Owned2

Investments in Partially Owned Entities (Details) (USD $)	12 Months Ended			3 Months Ended		12 Months Ended			3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014	Mar. 31, 2013	Nov. 01, 2014	Nov. 02, 2013	Oct. 27, 2012	Dec. 31, 2013	Sep. 30, 2014
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities	$1,246,496	$1,249,667	$1,704,297						$1,249,667
Comprehensive Income Net of Tax	935,518	596,567	563,141
Income (Loss) From Equity Method Investments	-58,131	-338,785	423,126
Non-cash impairment losses	0	72,974	300,752
Impairment Losses	26,518	37,170	133,977
Condensed Financial Information For Equity Method Investments [Abstract]
Assets	21,389,000	21,773,000							21,773,000
Liabilities	17,986,000	17,982,000							17,982,000
Noncontrolling interests	104,000	96,000							96,000
Equity	3,299,000	3,695,000							3,695,000
Total revenue	13,620,000	14,092,000	15,119,000
Net (loss) income attributable to investee	-434,000	-368,000	1,091,000
Equity Method Investment Summarized Financial Information Gain On Sale Of Real Estate Assets			600,000
Toys R Us [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	32.60%
Equity in net income				75,196	78,542
Fair value of invesements in Toys R Us		80,062							80,062
Carrying amount of investments in partially owned entities	0	83,224							83,224
Comprehensive Income Net of Tax		3,162
Excess of investee's carrying amount over equity in net assets		162,215							162,215
Income (Loss) From Equity Method Investments	-73,556	-362,377	14,859
Non-cash impairment losses	355,953			75,196	78,542
Condensed Financial Information For Equity Method Investments [Abstract]
Assets						11,267,000	11,756,000
Liabilities						10,377,000	10,437,000
Noncontrolling interests						82,000	75,000
Equity						808,000	1,244,000
Total revenue						12,645,000	13,046,000	13,698,000
Net (loss) income attributable to investee						-343,000	-396,000	138,000
Equity Method Investment, Difference Excess Of Underlying Equity Over Carrying Amount	263,455
Toys R Us [Member] | Equity In Net Income After Income Taxes [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	-4,691	-128,919	45,267
Toys R Us [Member] | Management Fees [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	6,331	7,299	9,592
Toys R Us [Member] | Impairment Loss [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Other than Temporary Impairment Losses Investments									162,215
Income (Loss) From Equity Method Investments	-75,196	-240,757	-40,000
Alexanders Inc [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Equity method ownership percentage	32.40%
Carrying amount of investments in partially owned entities	131,616	167,785							167,785
Excess of investee's carrying amount over equity in net assets	42,048
Income (Loss) From Equity Method Investments	30,009	24,402	218,391
Condensed Financial Information For Equity Method Investments [Abstract]
Assets	1,423,000	1,458,000							1,458,000
Liabilities	1,075,000	1,124,000							1,124,000
Equity	348,000	334,000							334,000
Total revenue	201,000	196,000	191,000
Net (loss) income attributable to investee	68,000	57,000	674,000
Equity Method Investment Summarized Financial Information Gain On Sale Of Real Estate Assets			600,000
Alexanders Inc [Member] | Equity In Net Income After Income Taxes [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	21,287	17,721	24,709
Alexanders Inc [Member] | Management Leasing And Development Fees [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	8,722	6,681	13,748
Alexanders Inc [Member] | Net Gain On Sale Of Real Estate [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	0	0	179,934
India real estate ventures [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities	76,752	88,467							88,467
Income (Loss) From Equity Method Investments	-8,309	-3,533	-5,008
Non-cash impairment losses	5,771
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	760,749	621,294							621,294
Income (Loss) From Equity Method Investments	93	-4,212	-3,770
Other equity method investments [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities	277,379	288,897							288,897
Income (Loss) From Equity Method Investments	-6,368	-10,817	103,644
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
Lexington Realty Trust [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	0	-979	28,740
Lexington Realty Trust [Member] | Net Gain From Stock Issuance And Asset Acquisition [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	0	0	28,763
Lexington Realty Trust [Member] | Impairment Loss [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	0	-979	-23
LNR [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Other than Temporary Impairment Losses Investments					27,231
Income (Loss) From Equity Method Investments	0	18,731	66,270
LNR [Member] | Net gain on sale [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	0	3,776	0
LNR [Member] | Equity In Net Income After Income Taxes [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	0	42,186	66,270
LNR [Member] | Impairment Loss [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Income (Loss) From Equity Method Investments	0	-27,231	0
All Equity Method Investees Excluding Toys [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Carrying amount of investments in partially owned entities	1,246,496	1,166,443							1,166,443
Income (Loss) From Equity Method Investments	$15,425	$23,592	$408,267

Investments_in_Partially_Owned3

Investments in Partially Owned Entities (Alexander's Inc.) (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 22, 2014	Jan. 15, 2015
Leasing Agreement [Abstract]
Fee And Other Income	$155,206,000	$155,571,000	$119,077,000
Condensed Financial Information For Equity Method Investments [Abstract]
Assets	21,389,000,000	21,773,000,000
Liabilities	17,986,000,000	17,982,000,000
Noncontrolling interests	104,000,000	96,000,000
Equity	3,299,000,000	3,695,000,000
Total revenue	13,620,000,000	14,092,000,000	15,119,000,000
Net (loss) income attributable to investee	-434,000,000	-368,000,000	1,091,000,000
Equity Method Investment Summarized Financial Information Gain On Sale Of Real Estate Assets			600,000,000
Retail Segment Strip Shopping Centers [Member]
Managment And Development Agreement [Abstract]
Number Of Real Estate Properties	22
Subsequent Event [Member] | Urban Edge Properties [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
Subsequent Event [Member] | Urban Edge Properties [Member] | Retail Segment Strip Shopping Centers [Member]
Managment And Development Agreement [Abstract]
Number Of Real Estate Properties					79
Subsequent Event [Member] | Urban Edge Properties [Member] | Retail Segment Regional Malls [Member]
Managment And Development Agreement [Abstract]
Number Of Real Estate Properties					3
Subsequent Event [Member] | Urban Edge Properties [Member] | Warehouse [Member]
Managment And Development Agreement [Abstract]
Number Of Real Estate Properties					1
Alexanders Inc [Member]
Equity Method Investments And Income From Equity Method Investments [Abstract]
Ownership common shares, investee (in shares)	1,654,068
Equity method ownership percentage	32.40%
Closing share price (in dollars per share)	$437.18
Equity Method Investment Market Value	723,125,000
Excess of investee's fair value over carrying amount	591,509,000
Excess of investee's carrying amount over equity in net assets	42,048,000
Managment And Development Agreement [Abstract]
Property Management Fee Description	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) $280,000, 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 Maximum				4,000,000
Debt Instrument, Description of Variable Rate Basis	one-year LIBOR
Spread Over LIBOR (in percentage)	1.00%
Unpaid Balance Year End Interest Rate	1.58%
Repayment of Alexander's Inc. leasing commissions				40,353,000
Other Agreements [Abstract]
Fee Income recognized by equity method investees for building maintenance services	2,318,000	2,036,000	2,362,000
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.
Other Services Fee Description	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, for an annual fee of the costs for such services plus 6%.
Condensed Financial Information For Equity Method Investments [Abstract]
Assets	1,423,000,000	1,458,000,000
Liabilities	1,075,000,000	1,124,000,000
Equity	348,000,000	334,000,000
Total revenue	201,000,000	196,000,000	191,000,000
Net (loss) income attributable to investee	68,000,000	57,000,000	674,000,000
Equity Method Investment Summarized Financial Information Gain On Sale Of Real Estate Assets			600,000,000
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	0.5
Alexanders Inc [Member] | Common Area 731 Lexington Avenue [Member]
Managment And Development Agreement [Abstract]
Management and Development fee income	$280,000
Property Management Fee Agreement Percentage Of Income	3.00%
Other Agreements [Abstract]
Other Supervisory Fees Percent	6.00%

Investments_in_Partially_Owned4

Investments in Partially Owned Entities (LNR) (Details) (USD $)	12 Months Ended			1 Months Ended	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2013	Mar. 31, 2013
Schedule Of Equity Method Investments [Line Items]
Proceeds from the sale of LNR	$0	$240,474,000	$0
LNR [Member]
Schedule Of Equity Method Investments [Line Items]
Sales Of Real Estate				1,053,000,000
Impairment loss					27,231,000
LNR [Member] | Vornado Realty Trust [Member]
Schedule Of Equity Method Investments [Line Items]
Proceeds from the sale of LNR				$240,474,000

Investments_in_Partially_Owned5

Investments in Partially Owned Entities (One Park Avenue and 61 Ninth Avenue) (Details) (USD $)	12 Months Ended	0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Jun. 26, 2014	Jul. 23, 2014	Dec. 31, 2013
			sqft
Schedule Of Equity Method Investments [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)	$513,973			$667,710
Notes And Loans Payable	8,263,165			7,131,231
Lease expiration term	30 years
One Park Avenue [Member]
Schedule Of Equity Method Investments [Line Items]
Aggregate fair value of Real Estate Fund investments (in US Dollars)		560,000
Maturity, Range, End		Mar-16
One Park Avenue [Member] | Mortgage loan at 4.995% Matures 2016 [Member]
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable		250,000
Interest Rate, End of Period (in percentage)		5.00%
One Park Avenue [Member] | Vornado Realty Trust [Member]
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Ownership Additional Investment		22,700
Equity method ownership percentage		55.00%		46.50%
One Park Avenue [Member] | Co Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage		45.00%
Sixty One Ninth Avenue Property [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage			50.10%
Lease expiration term			99 years
Square Footage Of Real Estate Property			130,000
Estimated Development Cost			$125,000

Investments_in_Partially_Owned6

Investments in Partially Owned Entities - Debt (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Equity Method Investments [Line Items]
Equity Method Investment Pro Rata Share Debt Of Partially Owned Entities	$4,273,632	$4,189,403
Toys R Us [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	32.60%
Maturity, Range, Start	2015
Maturity, Range, End	2021
Interest Rate, End of Period (in percentage)	7.23%
Equity Method Investment Debt Of Partially Owned Entities	5,748,350	5,702,247
Alexanders Inc [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	32.40%
Maturity, Range, Start	2015
Maturity, Range, End	2021
Interest Rate, End of Period (in percentage)	2.59%
Equity Method Investment Debt Of Partially Owned Entities	1,032,780	1,049,959
Partially owned office buildings [Member]
Schedule Of Equity Method Investments [Line Items]
Maturity, Range, Start	2015
Maturity, Range, End	2023
Interest Rate, End of Period (in percentage)	5.59%
Equity Method Investment Debt Of Partially Owned Entities	3,691,274	3,622,759
India real estate ventures [Member] | Minimum [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	4.10%
India real estate ventures [Member] | Maximum [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	36.50%
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	2015
Maturity, Range, End	2026
Interest Rate, End of Period (in percentage)	13.25%
Equity Method Investment Debt Of Partially Owned Entities	183,541	199,021
Other equity method investments [Member]
Schedule Of Equity Method Investments [Line Items]
Maturity, Range, Start	2015
Maturity, Range, End	2023
Interest Rate, End of Period (in percentage)	4.33%
Equity Method Investment Debt Of Partially Owned Entities	$1,480,485	$1,709,509

Mortgage_and_Mezzanine_Loans_R1

Mortgage and Mezzanine Loans Receivable (Narratives) (Details) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended		0 Months Ended	1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 14, 2014	Mar. 31, 2013	Oct. 31, 2012	Apr. 17, 2013	31-May-14	Mar. 31, 2014
						Story
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other liabilities	$375,830,000	$429,249,000
Elimination of a mortgage and mezzanine loan asset and liability	59,375,000	0	0
Interest And Other investment (Loss) Income Net	38,752,000	-24,887,000	-261,200,000
Mortgage and mezzanine loans receivable	16,748,000	170,972,000
Mortgage and mezzanine loans receivable, allowance (in US dollars)	5,811,000	5,845,000
Mezzanine Loan Receivable - Interest Rate	9.10%	11.00%
Mezzanine Loans Receiveable - Maturity Start Date	Apr-15
Mezzanine Loans Receiveable - Maturity End Date	May-16
NY 701 Seventh Avenue [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mezzanine Loan Ownership Percentage						25.00%
Mortgage and mezzanine loan for the acquisition and redevelopment						475,000,000
Number Of Story In Office Tower						10
Loans Receivable Description Of Variable Rate Basis						LIBOR
Loans Receivable, Basis Spread on Variable Rate						10.20%
LIBOR Floor (in percentage)						1.00%
Mezzanine Loans Receivable - Carrying Amount						375,000,000
Percentage Of Participation In Mortgage Interest Sold					25.00%
Other liabilities		59,375,000
Elimination of a mortgage and mezzanine loan asset and liability				59,375,000
NY 701 Seventh Avenue [Member] | Vornado Realty Trust [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mezzanine Loans Receivable - Carrying Amount						93,750,000
Other Mezzanine Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Prepayment Of Mezzanine Loan Receivable							50,091,000	25,000,000	30,000,000
Mezzanine Loan Receivable - Maturity Date							Aug-15	Nov-14	Jan-15
Proceeds From Collection Of Notes Receivable Including Prepayment Penalty							55,358,000
Interest And Other investment (Loss) Income Net							$5,267,000

Dispositions_Narratives_Detail

Dispositions (Narratives) (Details) (USD $)

12 Months Ended

0 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Feb. 24, 2014

Jul. 08, 2014

Mar. 02, 2014

Jan. 24, 2013

Apr. 15, 2013

Sep. 23, 2013

Nov. 07, 2012

Jul. 26, 2012

Jan. 06, 2012

Jun. 22, 2012

Dec. 31, 2012

Dec. 18, 2014

Dec. 17, 2013

sqft

sqft

Properties

sqft

sqft

sqft

sqft

sqft

sqft

sqft

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Net gains on sale of real estate

$507,192,000

$414,502,000

$245,799,000

Gain on sale of Canadian Trade Shows

0

0

31,105,000

Impairment Losses

26,518,000

37,170,000

133,977,000

Seller Financing Related To Property Sales

0

0

35,000,000

Retail Segment Strip Shopping Centers [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

66,410,000

Net gains on sale of real estate

22,500,000

Number Of Real Estate Properties Sold

6

Number Of Real Estate Properties

22

Canadian Trade Shows [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gain on sale of Canadian Trade Shows

0

0

19,657,000

Income tax on gain on sale

11,448,000

Retail Properties Segment [Member] | Retail Segment Strip Shopping Centers [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Sale price of real estate

82,300,000

157,000,000

Net gains on sale of real estate

7,851,000

22,266,000

Number Of Real Estate Properties Sold

12

12

Retail Properties Segment [Member] | Retail NY Hicksville (Broadway Mall) [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [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]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

260,000,000

Square Footage Of Real Estate Property Sold

335,000

Sale price of real estate

239,000,000

Mortgage loan receivable

21,000,000

Mortgage loan receivable maturity tenure

10 years

Net gains on sale of real estate

44,155,000

Retail Properties Segment [Member] | Retail Springfield Mall [Member] | Pennsylevenia Real Estate Investment Trust [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

465,000,000

Square Footage Of Real Estate Property Sold

1,350,000

Sale price of real estate

340,000,000

Operating Partnership Units Value Received From Buyer

125,000,000

Impairment Losses

20,000,000

Retail Properties Segment [Member] | Green Acres Mall [Member] | Retail Segment Regional Malls [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

500,000,000

Net proceeds from the sale of real estate

185,000,000

Net gains on sale of real estate

202,275,000

Retail Properties Segment [Member] | Plant [Member] | Retail Segment Strip Shopping Centers [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

203,000,000

Net proceeds from the sale of real estate

98,000,000

Net gains on sale of real estate

32,169,000

Retail Properties Segment [Member] | Gallery At Market Street [Member] | Retail Segment Strip Shopping Centers [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

60,000,000

Net proceeds from the sale of real estate

58,000,000

Net gains on sale of real estate

33,058,000

Retail Properties Segment [Member] | Tampa Florida [Member] | Retail Segment Strip Shopping Centers [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

45,000,000

Retail Properties Segment [Member] | Tampa Florida [Member] | Retail Segment Strip Shopping Centers [Member] | Vornado Realty Trust [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

33,750,000

Net proceeds from the sale of real estate

20,810,000

Net gains on sale of real estate

8,728,000

Sale Of Ownership Interest Percent

75.00%

Washington DC Segment [Member] | Reston Executive [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

126,250,000

Square Footage Of Real Estate Property Sold

494,000

Net gains on sale of real estate

36,746,000

Number Of Real Estate Properties Sold

3

Washington DC Segment [Member] | 409 Third Street SW [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Square Footage Of Real Estate Property Sold

409,000

Sale price of real estate

200,000,000

Net gains on sale of real estate

126,621,000

Merchandise Mart Segment [Member] | West Mart Center 350 [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Square Footage Of Real Estate Property Sold

1,200,000

Sale price of real estate

228,000,000

Net gains on sale of real estate

54,911,000

Merchandise Mart Segment [Member] | LA Mart [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

53,000,000

Square Footage Of Real Estate Property Sold

784,000

Sale price of real estate

18,000,000

Duration Of Seller Financing Rate

9 months

Seller financing rate

6.00%

Seller Financing Related To Property Sales

35,000,000

Merchandise Mart Segment [Member] | Washington Design Center and Canadian Trade Shows [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Sale price of real estate

103,000,000

Merchandise Mart Segment [Member] | Washington Design Center [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Square Footage Of Real Estate Property Sold

393,000

Merchandise Mart Segment [Member] | Canadian Trade Shows [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gain on sale of Canadian Trade Shows

19,657,000

Merchandise Mart Segment [Member] | Boston Design Center [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Square Footage Of Real Estate Property Sold

554,000

554,000

Sale price of real estate

72,400,000

Net gains on sale of real estate

5,252,000

New York Segment [Member] | New York Office 1740 Broadway [Member] | Office Building [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

605,000,000

Net proceeds from the sale of real estate

580,000,000

Square Footage Of Real Estate Property Sold

601,000

Net gains on sale of real estate

441,000,000

Income tax on gain on sale

484,000,000

New York Segment [Member] | New York Office 866 UN Plaza [Member]

Disposal Group Including Discontinued Operation Additional Disclosures [Abstract]

Gross proceeds from the sale of real estate

200,000,000

Net proceeds from the sale of real estate

146,439,000

Square Footage Of Real Estate Property Sold

360,000

Net gains on sale of real estate

$127,512,000

Dispositions_Details_1

Dispositions (Details 1) (USD $)	12 Months Ended			0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 26, 2012
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	$2,238,474	$2,636,080
Liabilities related to discontinued operations	1,511,362	1,441,853
Discontinued Operation, Income (Loss) from Discontinued Operations Disclosure [Abstract]
Total revenues	394,056	499,964	581,392
Total expenses	275,828	312,675	418,653
Income from discontinued operations before gain on sale of real estate	118,228	187,289	162,739
Net gains on sale of real estate	507,192	414,502	245,799
Impairment losses	-41,474	-37,170	-127,839
Gain on sale of Canadian Trade Shows, net of 11,448 of income taxes	0	0	31,105
Gain on sale of assets other than real estate	0	1,377	8,491
Income (Loss) from Discontinued Operations	583,946	565,998	308,847
Canadian Trade Shows [Member]
Discontinued Operation, Income (Loss) from Discontinued Operations Disclosure [Abstract]
Gain on sale of Canadian Trade Shows, net of 11,448 of income taxes	0	0	19,657
Retail Properties Segment [Member]
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	2,238,474	2,497,918
Liabilities related to discontinued operations	1,511,362	1,441,853
New York Segment [Member]
Disposal Group Including Discontinued Operation Unclassified Balance Sheet Disclosures Abstract
Assets related to discontinued operations	0	138,162
Liabilities related to discontinued operations	0	0
Other Segment [Member]
Discontinued Operation, Income (Loss) from Discontinued Operations Disclosure [Abstract]
Income (Loss) from Discontinued Operations	120,783	405,684	110,788
Merchandise Mart Segment [Member] | Canadian Trade Shows [Member]
Discontinued Operation, Income (Loss) from Discontinued Operations Disclosure [Abstract]
Gain on sale of Canadian Trade Shows, net of 11,448 of income taxes				$19,657

Identified_Intangible_Assets_a2

Identified Intangible Assets and Intangible Liabilities (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets And Liabilities [Line Items]
Gross amount	$424,976	$505,203
Accumulated amortization	-199,821	-252,121
Net	225,155	253,082
Gross amount	657,976	622,685
Accumulated amortization	-329,775	-295,768
Net	328,201	326,917
Below Market Leases Net Of Above Market Leases [Member]
Finite-Lived Intangible Assets And Liabilities [Line Items]
Amortization of Intangible Assets	37,516	41,970	39,815
2015	49,550
2016	37,894
2017	35,069
2018	34,166
2019	23,928
Other Identified Intangible Assets [Member]
Finite-Lived Intangible Assets And Liabilities [Line Items]
Amortization of Intangible Assets	28,275	61,915	46,160
2015	25,735
2016	20,122
2017	16,619
2018	12,417
2019	10,470
Tenant Under Ground Leases [Member]
Finite-Lived Intangible Assets And Liabilities [Line Items]
Amortization of Intangible Assets	1,832	2,745	-403
2015	1,832
2016	1,832
2017	1,832
2018	1,832
2019	$1,832

Debt_Narratives_Details

Debt (Narratives) (Details) (USD $)

12 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

1 Months Ended

0 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Jun. 16, 2014

Jan. 31, 2014

Apr. 16, 2014

Jul. 16, 2014

Dec. 08, 2014

Jan. 06, 2015

Jan. 15, 2015

Aug. 12, 2014

Oct. 27, 2014

Aug. 26, 2014

Oct. 31, 2014

Dec. 31, 2014

Jan. 31, 2015

Sep. 30, 2014

sqft

sqft

Tranches

Properties

Extensions

Extensions

Extensions

sqft

CreditFacilities

sqft

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

$8,263,165,000

$7,131,231,000

$8,263,165,000

Proceeds from borrowings

2,428,285,000

2,262,245,000

3,593,000,000

Senior Unsecured Notes Due 2019 [Member]

Debt Instrument [Line Items]

Debt Instrument Maturity

30-Jun-19

Interest Rate, End of Period (in percentage)

2.58%

Public Offering Of Notes Payable (in US Dollars)

450,000,000

Public Offering, Interest Rate

2.50%

Debt Instrument Issuance Price Percentage

99.62%

New York Manhattan 220 Central Park South Site [Member]

Debt Instrument [Line Items]

Debt Instrument, Description of Variable Rate Basis

LIBOR

New York Two Penn Plaza [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

153,000,000

Notes And Mortgages Payable Fixed Rate [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

6,499,396,000

6,439,371,000

6,499,396,000

Interest Rate, End of Period (in percentage)

4.46%

4.46%

Notes And Mortgages Payable Fixed Rate [Member] | New York 909 Third Avenue [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

193,000,000

Debt Instrument Maturity

May-21

Notes And Loans Payable Refinanced Amount (in US Dollars)

350,000,000

Square Footage Of Real Estate Property

1,300,000

Debt Term

7 years

Interest Rate, End of Period (in percentage)

5.64%

3.91%

Proceeds from borrowings

145,000,000

Notes And Mortgages Payable Fixed Rate [Member] | Las Catalinas Mall [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

130,000,000

Debt Instrument Maturity

Aug-24

Square Footage Of Real Estate Property

494,000

Debt Term

10 years

Interest Rate, End of Period (in percentage)

4.43%

Debt Instrument Amortization Period

30 years

Debt Maturity Beginning Period

6 years

Notes And Mortgages Payable Fixed Rate [Member] | New York Two Penn Plaza [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

422,000,000

Debt Instrument Maturity

Mar-18

Interest Rate, End of Period (in percentage)

4.78%

Notes And Mortgages Payable Fixed Rate [Member] | New York Two Penn Plaza [Member] | Swap [Member]

Debt Instrument [Line Items]

Debt Instrument Maturity

Mar-18

Interest Rate, End of Period (in percentage)

4.78%

Notes And Mortgages Payable Fixed Rate [Member] | Retail Montehiedra Town Center [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

120,000,000

Interest Rate, End of Period (in percentage)

6.04%

Number Of Loan Tranches

2

Debt Instrument Maturity Date Original

Jul-16

Debt Instrument Maturity Date New

Jul-21

Notes And Mortgages Payable Fixed Rate [Member] | Retail Montehiedra Town Center [Member] | Subsequent Event [Member] | Urban Edge Properties [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

10.00%

Unfunded Commitments to the Real Estate Fund

20,000,000

Commitment Funded During Period

8,000,000

Notes And Mortgages Payable Fixed Rate Senior Position [Member] | Retail Montehiedra Town Center [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

5.33%

Principal amount of mortgage loans

90,000,000

Notes And Mortgages Payable Fixed Rate Junior Position [Member] | Retail Montehiedra Town Center [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

3.00%

Principal amount of mortgage loans

30,000,000

Notes And Mortgages Payable Variable Rate [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

1,763,769,000

691,860,000

1,763,769,000

Interest Rate, End of Period (in percentage)

2.20%

2.20%

Notes And Mortgages Payable Variable Rate [Member] | New York Manhattan 220 Central Park South Site [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

600,000,000

Spread Over LIBOR (in percentage)

2.75%

Debt Instrument Maturity

Jan-16

Number Of Extensions Available

3

Length Of Extension Available

1 year

Interest Rate, End of Period (in percentage)

2.92%

2.92%

Notes And Mortgages Payable Variable Rate [Member] | Washington DC Universal Buildings [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

185,000,000

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.90%

Debt Instrument Maturity

Aug-19

Number Of Extensions Available

2

Length Of Extension Available

1 year

Square Footage Of Real Estate Property

690,000

Interest Rate, End of Period (in percentage)

2.06%

2.06%

Debt Instrument Amortization Period

30 years

Debt Maturity Beginning Period

4 years

Number Of Office Buildings

2

Notes And Mortgages Payable Variable Rate [Member] | New York 655 Fifth Avenue [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

140,000,000

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.40%

Debt Instrument Maturity

Oct-19

Number Of Extensions Available

2

Length Of Extension Available

1 year

Square Footage Of Real Estate Property

57,500

Interest Rate, End of Period (in percentage)

1.56%

1.56%

Notes And Mortgages Payable Variable Rate [Member] | New York Two Penn Plaza [Member]

Debt Instrument [Line Items]

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.65%

Debt Instrument Maturity

2019

Number Of Extensions Available

2

Length Of Extension Available

1 year

Notes And Loans Payable Refinanced Amount (in US Dollars)

575,000,000

Square Footage Of Real Estate Property

1,600,000

Interest Rate, End of Period (in percentage)

1.81%

1.81%

Proceeds from borrowings

143,000,000

Notes And Mortgages Payable Variable Rate [Member] | New York Two Penn Plaza [Member] | Swap [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

422,000,000

Total Notes And Mortgages Payable [Member]

Debt Instrument [Line Items]

Mortgages payable (in US Dollars)

8,263,165,000

7,131,231,000

8,263,165,000

Interest Rate, End of Period (in percentage)

3.98%

3.98%

Standby Commitment [Member] | New York Manhattan 220 Central Park South Site [Member]

Debt Instrument [Line Items]

Debt Term

5 years

Mezzanine loan financing (in US Dollars)

500,000,000

Senior Unsecured Notes [Member]

Debt Instrument [Line Items]

Interest Rate, End of Period (in percentage)

3.89%

3.89%

Senior Unsecured Notes 7.875% [Member]

Debt Instrument [Line Items]

Debt Instrument Maturity

1-Oct-39

Interest Rate, End of Period (in percentage)

7.88%

Redemption of senior unsecured notes

445,000,000

Redemption Price, Percentage of Principal Amount Redeemed

100.00%

Unamortized deferred financing costs, write off

12,532,000

Senior Unsecured Notes 4.25% [Member] | Subsequent Event [Member]

Debt Instrument [Line Items]

Debt Instrument Maturity

1-Apr-15

Interest Rate, End of Period (in percentage)

4.25%

Redemption of senior unsecured notes

500,000,000

Redemption Price, Percentage of Principal Amount Redeemed

100.00%

Unsecured Revolving Credit Facilities [Member]

Debt Instrument [Line Items]

Debt Instrument, Description of Variable Rate Basis

LIBOR

Spread Over LIBOR (in percentage)

1.05%

1.25%

Number Of Extensions Available

2

Length Of Extension Available

6 months

Interest Rate, End of Period (in percentage)

Number Of Revolving Credit Facilities

2

Extension Executed On Number Of Revolving Credit Facility

1

Line of Credit Facility, Maximum Borrowing Capacity

$1,250,000,000

Debt Instrument Maturity Date Original

Nov-15

Debt Instrument Maturity Date New

Nov-18

Facility Fee (in percentage)

0.20%

0.25%

Debt_Summary_of_Debt_Details

Debt (Summary of Debt) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Mortgages payable (in US Dollars)	$8,263,165,000	$7,131,231,000
Senior unsecured notes	1,347,159,000	1,350,855,000
Revolving credit facility debt	0	295,870,000
Debt Fiscal Year Maturity [Abstract]
Collateral Property Net Carrying Value	9,400,000,000
Unsecured Debt [Member]
Debt Fiscal Year Maturity [Abstract]
2015	500,000,000
2016	0
2017	0
2018	0
2019	450,000,000
Thereafter	400,000,000
Notes And Mortgages Payable Fixed Rate [Member]
Debt Instrument [Line Items]
Mortgages payable (in US Dollars)	6,499,396,000	6,439,371,000
Interest Rate, End of Period (in percentage)	4.46%
Notes And Mortgages Payable Variable Rate [Member]
Debt Instrument [Line Items]
Mortgages payable (in US Dollars)	1,763,769,000	691,860,000
Interest Rate, End of Period (in percentage)	2.20%
Total Notes And Mortgages Payable [Member]
Debt Instrument [Line Items]
Mortgages payable (in US Dollars)	8,263,165,000	7,131,231,000
Interest Rate, End of Period (in percentage)	3.98%
Debt Fiscal Year Maturity [Abstract]
2015	407,229,000
2016	1,399,378,000
2017	609,680,000
2018	240,674,000
2019	979,197,000
Thereafter	4,624,897,000
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Senior unsecured notes	1,347,159,000	1,350,855,000
Interest Rate, End of Period (in percentage)	3.89%
Unsecured Revolving Credit Facilities [Member]
Debt Instrument [Line Items]
Revolving credit facility debt	0	295,870,000
Interest Rate, End of Period (in percentage)
Unsecured Debt [Member]
Debt Instrument [Line Items]
Unsecured Debt And Revolving Credit Facility	$1,347,159,000	$1,646,725,000
Interest Rate, End of Period (in percentage)	3.89%

Redeemable_Partnership_Units_D

Redeemable Partnership Units (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	$1,336,780	$1,002,620
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount	1,000	1,000
Redeemable Noncontrolling Interests Rollforward [Abstract]
Reedemable Noncontrolling Interest, Beginning Balance	1,003,620	944,152
Net Income	47,613	24,817
Other comprehensive income (loss)	1,323	5,296	-6,707
Distributions	-33,469	-34,053
Cumulative Redeemable Preferred Units Redemption Amount		-36,900
Other, net	30,690	17,373
Reedemable Noncontrolling Interest, Ending Balance	1,337,780	1,003,620	944,152
Capital Unit, Class A [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	1,336,780	1,002,620
Outstanding Partnership Units held by Third Parties (in units)	11,356,550	11,292,038
Preferred Or Annual Distribution Rate (in dollars per unit)	$2.92
Redeemable Noncontrolling Interests Rollforward [Abstract]
Redemption of Class A units for common shares, at redemption value	-27,273	-25,317
Adjustment to carry Class A redeemable units at redemption value	315,276	108,252
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 (in units)	1	1
Par or Stated Value Per Share	$1,000,000
Preferred Or Annual Distribution Rate (in dollars per unit)	$50,000
Dividend Percentage	5.00%
Cumulative Redeemable Preferred Unit [Member]
Redeemable Noncontrolling Interest Units Table [Abstract]
Outstanding Partnership Units held by Third Parties (in units)	1	1
Redeemable Noncontrolling Interests Additional Disclosure [Abstract]
Fair value of Series G convertible preferred units and Series D-13 cumulative redeemable preferred units	$55,097	$55,097

Partners_Capital_Details

Partners' Capital (Details) (USD $)	3 Months Ended				12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Common Stock Number Of Shares Par Value And Other Disclosures [Abstract]
Distributions to Vornado					$547,831	$545,913	$699,318
Quarterly Common Distributions (in USD)	$0.73	$0.73	$0.73	$0.73
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Preferred Stock, Value	1,277,026				1,277,026	1,277,225
Preferred shares of beneficial interest: outstanding shares	52,678,939				52,678,939	52,682,807
General Partners Capital Account	8,157,544				8,157,544	8,428,534
Accumulated Other Comprehensive Income Loss Net Of Tax	93,267				93,267	71,537
Class A Units Owned By Vornado [Member]
Common Stock Number Of Shares Par Value And Other Disclosures [Abstract]
Redeemable noncontrolling interests units outstanding, Class A units	187,887,498				187,887,498
Capital Unit, Class A [Member]
Details Of Preferred Shares Of Beneficial Interest [Abstract]
General Partners' Capital Account, Units Outstanding (in shares)	11,356,550				11,356,550
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]
General Partners Capital Account	1,393				1,393	1,592
General Partners' Capital Account, Units Outstanding (in shares)	28,939				28,939	32,807
Per Unit Liquidation Preference (in dollars per share)	$50				$50
Annual Distribution Rate (in dollars per share)					$3.25
General Partners' Capital Account, Units Authorized (in shares)	83,977				83,977	83,977
Conversion rate of Class A units per Series A Preferred unit	1.4334				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					6.63%
Preferred Stock Redemption Price Per Share	$25				$25
Details Of Preferred Shares Of Beneficial Interest [Abstract]
General Partners Capital Account	193,135				193,135	193,135
General Partners' Capital Account, Units Outstanding (in shares)	8,000,000				8,000,000	8,000,000
Per Unit Liquidation Preference (in dollars per share)	$25				$25
Annual Distribution Rate (in dollars per share)					$1.66
General Partners' Capital Account, Units Authorized (in 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					6.63%
Preferred Stock Redemption Price Per Share	$25				$25
Details Of Preferred Shares Of Beneficial Interest [Abstract]
General Partners Capital Account	262,379				262,379	262,379
General Partners' Capital Account, Units Outstanding (in shares)	10,800,000				10,800,000	10,800,000
Per Unit Liquidation Preference (in dollars per share)	$25				$25
Annual Distribution Rate (in dollars per share)					$1.66
General Partners' Capital Account, Units Authorized (in 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					6.88%
Preferred Stock Redemption Price Per Share	$25				$25
Details Of Preferred Shares Of Beneficial Interest [Abstract]
General Partners Capital Account	238,842				238,842	238,842
General Partners' Capital Account, Units Outstanding (in shares)	9,850,000				9,850,000	9,850,000
Per Unit Liquidation Preference (in dollars per share)	$25				$25
Annual Distribution Rate (in dollars per share)					$1.72
General Partners' Capital Account, Units Authorized (in 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]
General Partners Capital Account	290,971				290,971	290,971
General Partners' Capital Account, Units Outstanding (in shares)	12,000,000				12,000,000	12,000,000
Per Unit Liquidation Preference (in dollars per share)	$25				$25
Annual Distribution Rate (in dollars per share)					$1.43
General Partners' Capital Account, Units Authorized (in 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]
General Partners Capital Account	$290,306				$290,306	$290,306
General Partners' Capital Account, Units Outstanding (in shares)	12,000,000				12,000,000	12,000,000
Per Unit Liquidation Preference (in dollars per share)	$25				$25
Annual Distribution Rate (in dollars per share)					$1.35
General Partners' Capital Account, Units Authorized (in shares)	12,000,000				12,000,000	12,000,000

Partners_Capital_Details_1

Partners' Capital (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Accumulated other comprehensive (loss) income, Beginning Balance	$71,537
Net current period OCI	21,730
Accumulated other comprehensive (loss) income, Ending Balance	93,267
Interest rate Swap [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	-31,882
Net current period OCI	6,079
Accumulated other comprehensive (loss) income, Ending Balance	-25,803
Securities available for sale [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	119,309
Net current period OCI	14,465
Accumulated other comprehensive (loss) income, Ending Balance	133,774
Pro Rata Share Of Non Consolidated Subsidiaries Oci [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	-11,501
Net current period OCI	2,509
Accumulated other comprehensive (loss) income, Ending Balance	-8,992
Other [Member]
Accumulated other comprehensive (loss) income, Beginning Balance	-4,389
Net current period OCI	-1,323
Accumulated other comprehensive (loss) income, Ending Balance	($5,712)

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2014
In Thousands, unless otherwise specified
Consolidated Variable Interest Entities [Member] | Independence Plaza And Warner Building [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	$0
Consolidated Variable Interest Entities [Member] | One Park Avenue, Independence Plaza, And Warner Building [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net		0
Non Consolidated Variable Interest Entities [Member] | Independence Plaza And Warner Building [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	152,929
Non Consolidated Variable Interest Entities [Member] | One Park Avenue, Independence Plaza, And Warner Building [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets		$286,783

Fair_Value_Measurements_Narrat

Fair Value Measurements (Narratives) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	Investments	Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Fund investments	$513,973,000	$667,710,000
Toys R Us [Member] | Discounted Cash Flow Methodology [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	5.75
Financial Projections Period	5 years
Discount rates	10.00%
Fair Value Inputs Tax Rate	38.00%
Minimum [Member] | Toys R Us [Member] | Market Multiple Methodology [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	5.75
Minimum [Member] | Toys R Us [Member] | Comparable Sales Methodology [Member]
Fair Value Inputs [Abstract]
Fair Value Assumptions, Sales Of Comparable Companies (in US Dollars)	150,000,000
Minimum [Member] | Toys R Us [Member] | Black Scholes Valuation Analysis [Member]
Fair Value Inputs [Abstract]
Fair Value Assumptions Expiration Periods	1 year
Fair Value Assumptions, Expected Volatility Rate	24.00%
Maximum [Member] | Toys R Us [Member] | Market Multiple Methodology [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	6.5
Maximum [Member] | Toys R Us [Member] | Comparable Sales Methodology [Member]
Fair Value Inputs [Abstract]
Fair Value Assumptions, Sales Of Comparable Companies (in US Dollars)	3,000,000,000
Maximum [Member] | Toys R Us [Member] | Black Scholes Valuation Analysis [Member]
Fair Value Inputs [Abstract]
Fair Value Assumptions Expiration Periods	3 years
Fair Value Assumptions, Expected Volatility Rate	29.00%
Weighted Average [Member] | Toys R Us [Member] | Black Scholes Valuation Analysis [Member]
Fair Value Inputs [Abstract]
Fair Value Assumptions Expiration Periods	2 years
Real Estate Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number Of Investments Held By Fund	7	9
Real Estate Fund investments	513,973,000	667,710,000
Excess of fair value over cost	$176,899,000
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	0 years 9 months 18 days
Fair Value Inputs [Abstract]
Discount rates	12.00%
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	6 years 0 months 0 days
Fair Value Inputs [Abstract]
Discount rates	17.50%
Real Estate Fund [Member] | Weighted Average [Member]
Fair Value Inputs [Abstract]
Discount rates	13.70%

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$206,323	$191,917
Real Estate Fund Nondepreciable Real Estate	513,973	667,710
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	206,323	191,917
Real Estate Fund Nondepreciable Real Estate	513,973	667,710
Deferred Compensation Plan Assets	117,284	116,515
Total assets	837,580	976,142
Mandatorily redeemable instruments (included in other liabilities)	55,097	55,097
Interest rate swap (included in other liabilities)	25,797	31,882
Total liabilities	80,894	86,979
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	4,848	354,341
Total Assets, Nonrecurring		437,565
Fair Value, Measurements, Nonrecurring [Member] | Toys R Us [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in Partially Owned Entities at Fair Value		83,224
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	206,323	191,917
Real Estate Fund Nondepreciable Real Estate	0	0
Deferred Compensation Plan Assets	53,969	47,733
Total assets	260,292	239,650
Mandatorily redeemable instruments (included in other liabilities)	55,097	55,097
Interest rate swap (included in other liabilities)	0	0
Total liabilities	55,097	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	0
Total Assets, Nonrecurring		0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Toys R Us [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in Partially Owned Entities 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 Nondepreciable Real Estate	0	0
Deferred Compensation Plan Assets	0	0
Total assets	0	0
Mandatorily redeemable instruments (included in other liabilities)	0	0
Interest rate swap (included in other liabilities)	25,797	31,882
Total liabilities	25,797	31,882
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	0
Total Assets, Nonrecurring		0
Fair Value Inputs Level 2 Member | Fair Value, Measurements, Nonrecurring [Member] | Toys R Us [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in Partially Owned Entities 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 Nondepreciable Real Estate	513,973	667,710
Deferred Compensation Plan Assets	63,315	68,782
Total assets	577,288	736,492
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	354,341
Total Assets, Nonrecurring		437,565
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Toys R Us [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in Partially Owned Entities at Fair Value		$83,224

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 1) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Real Estate Fund [Member]
Unobservable Quantitative Input [Abstract]
Opening Balance - changes in Level 3 " deferred compensation plan assets"	$667,710	$600,786
Purchases	3,392	43,816
Sales/Dispositions/Distributions	-307,268	-70,848
Net realized gains	73,802	85,771
Net unrealized gains	76,337	8,184
Other, Net	0	1
Closing Balance - changes in Level 3 " deferred compensation plan assets"	513,973	667,710
Real Estate Fund [Member] | Minimum [Member]
Unobservable Quantitative Input [Abstract]
Discount rates	12.00%
Terminal capitalization rates	4.70%
Fair Value Measurement Anticipated Investment Holding Period	0 years 9 months 18 days
Real Estate Fund [Member] | Maximum [Member]
Unobservable Quantitative Input [Abstract]
Discount rates	17.50%
Terminal capitalization rates	6.50%
Fair Value Measurement Anticipated Investment Holding Period	6 years 0 months 0 days
Real Estate Fund [Member] | Weighted Average [Member]
Unobservable Quantitative Input [Abstract]
Discount rates	13.70%
Terminal capitalization rates	5.30%
Deferred Compensation Plan Assets [Member]
Unobservable Quantitative Input [Abstract]
Opening Balance - changes in Level 3 " deferred compensation plan assets"	68,782	62,631
Purchases	14,162	5,018
Sales/Dispositions/Distributions	-24,951	-7,306
Realized and unrealized gains	3,415	7,189
Other, Net	1,907	1,250
Closing Balance - changes in Level 3 " deferred compensation plan assets"	$63,315	$68,782

Fair_Value_Measurements_Detail2

Fair Value Measurements (Details 2) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior unsecured notes	$1,347,159	$1,350,855
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	749,418	295,000
Mortgage and mezzanine loans receivable	16,748	170,972
Total assets	766,166	465,972
Mortgages payable	8,263,165	7,131,231
Senior unsecured notes	1,347,159	1,350,855
Revolving credit facility debt	0	295,870
Total debt	9,610,324	8,777,956
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents	749,000	295,000
Mortgage and mezzanine loans receivable	17,000	171,000
Total assets	766,000	466,000
Mortgages payable	8,224,000	6,903,000
Senior unsecured notes	1,385,000	1,402,000
Revolving credit facility debt	0	296,000
Total debt	$9,609,000	$8,601,000

Stockbased_Compensation_Narrat

Stock-based Compensation (Narratives) (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	$36,641	$34,914	$30,588
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)	4,004,000
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	6,185	3,226	2,826
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	11,937
Compensation Cost Recognition Period	1 year 4 months 24 days
Out Performance Plan 2015 [Member]
Out Performance Plan [Abstract]
Out of performance plan notional amount	40,000
Required award holding period after versing	1 year
Fair Value Of Awards Granted	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]
Out of performance plan notional amount	50,000
Required award holding period after versing	1 year
Fair Value Of Awards Granted	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]
Out of performance plan notional amount	40,000
Required award holding period after versing	1 year
Fair Value Of Awards Granted	6,814
Award Amortization Period	5 years
Out Performance Plan 2013 [Member] | Absolute [Member]
Out Performance Plan [Abstract]
Duration Of First Performance Measurement Period	2 years
Duration Of Second Performance Measurement Period	3 years
Required Shareholder Return Per Two Year	14.00%
Required Shareholder Return Three Year	21.00%
Out Performance Plan 2013 [Member] | Relative [Member]
Out Performance Plan [Abstract]
Duration Of First Performance Measurement Period	2 years
Duration Of Second 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 2012 [Member]
Out Performance Plan [Abstract]
Out of performance plan notional amount	40,000
Fair Value Of Awards Granted	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	4,550	8,234	8,638
Out Performance Plan [Abstract]
Compensation Cost Not Yet Recognized	1,855
Compensation Cost Recognition Period	1 year 6 months 0 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)	$20.31	$17.18	$17.50
Cash Received From Exercise Of Stock Options	17,441	5,915	9,546
Total Intrinsic Value Of Options Excercised	18,223	3,386	40,887
Restricted Stock Units RSU [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	1,303	1,344	1,604
Out Performance Plan [Abstract]
Compensation Cost Not Yet Recognized	1,468
Compensation Cost Recognition Period	1 year 8 months 12 days
Dividends Paid On Nonvested Units	88	110	200
Fair Value Of Awards Granted	1,048	857	929
Award Vesting Period	4 years
Fair Value Of Awards Vested	1,174	1,194	1,864
Restricted Operating Partnership Units Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Expense	24,603	22,110	17,520
Out Performance Plan [Abstract]
Compensation Cost Not Yet Recognized	20,798
Compensation Cost Recognition Period	1 year 8 months 12 days
Dividends Paid On Nonvested Units	2,866	2,598	3,203
Fair Value Of Awards Granted	19,669	31,947	16,464
Award Vesting Period	4 years
Fair Value Of Awards Vested	$22,758	$16,404	$15,014

Stockbased_Compensation_Detail

Stock-based Compensation (Details 1) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Units RSU [Member]
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	$79.24
Units Granted Weighted Average Grant Date Fair Value	$91.31
Awards Vested Weighted Average Grant Date Fair Value	$74.61
Units Cancelled Weighted Average Grant Date Fair Value	$87.42
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, End of Period	$87.58
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance	29,664
Restricted Stock Granted Shares	11,475
Units Vested	-15,733
Forfeited Units	-2,957
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance	22,449
Restricted Operating Partnership Units Plan [Member]
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	$76.27
Units Granted Weighted Average Grant Date Fair Value	$86.79
Awards Vested Weighted Average Grant Date Fair Value	$69.48
Units Cancelled Weighted Average Grant Date Fair Value	$83.16
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value, End of Period	$83.20
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance	765,971
Restricted Stock Granted Shares	226,638
Units Vested	-327,555
Forfeited Units	-6,575
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance	658,479
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	$67.51
Stock Options Granted Weighted Average Exercise Price	$91.32
Stock Options Exercised Weighted Average Exercise Price	$67.27
Stock Options Cancelled Weighted Average Exercise Price	$104.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, End of Period	$67.38	$67.51
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance	3,248,699
Stock Options Granted Shares	49,088
Stock Options Exercised Shares	-434,204
Stock Options Cancelled Shares	-43,468
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	2,820,115	3,248,699
Options Vested And Expected To Vest Shares	2,818,587
Options Vested And Expected To Vest Weighted Average Exercise Price	$67.37
Options Excercisable Shares	2,606,260
Options Excercisable Weighted Average Exercise Price	$65.62
Options Exercisable Weighted Average Remaining Contractual Term	4 years 4 months 24 days
Options Outstanding Weighted Average Remaining Contractual Term	4 years 7 months 6 days
Options Vested And Expected To Vest Weighted Average Remaining Contractual Term	4 years 7 months 6 days
Options Outstanding Aggregate Intrinsic Value (in US dollars)	$145,317
Options Vested And Expected To Vest Aggregate Intrinsic Value (in US dollars)	145,271
Options Excercisable Aggregate Intrinsic Value (in US dollars)	$138,912
Fair Value Assumptions Expected Volatility Rate	36.00%	36.00%	36.00%
Fair Value Assumptions Expected Life	5 years	5 years	5 years
Fair Value Assumptions Risk Free Interest Rate	1.81%	0.91%	1.05%
Fair Value Assumptions Risk Expected Dividend Yield (in percentage)	4.10%	4.30%	4.30%

Fee_and_Other_Income_Details

Fee and Other Income (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fee And Other Income [Line Items]
BMS cleaning fees	$85,658	$66,505	$67,584
Management and leasing fees	19,905	23,073	18,718
Lease termination fees	16,362	32,630	2,287
Other income	33,281	33,363	30,488
Fee and other income	155,206	155,571	119,077
New York 1290 Avenue Of 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
Vornado Realty Trust [Member] | New York 1290 Avenue Of Americas [Member]
Fee And Other Income [Line Items]
Lease termination fees		$12,121

Interest_and_Other_Investment_2

Interest and Other Investment Income (Loss), Net (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Dividends and interest on marketable securities	$12,707	$11,446	$11,979
Mark-to-market of investments in our deferred compensation plan	11,557	10,636	6,809
Interest on mezzanine loans receivable	3,920	19,495	13,861
Losses from the disposition of investment in J.C. Penney	0	-72,974	-300,752
Other, net	10,568	6,510	6,903
Interest and other investment (loss) income, net	$38,752	($24,887)	($261,200)

Interest_and_Debt_Expense_Deta

Interest and Debt Expense (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Expense Debt [Abstract]
Interest expense	$430,278	$444,412	$427,147
Amortization of deferred financing costs	45,263	23,673	20,889
Capitalized interest and debt expenses	-62,786	-42,303	-16,801
Interest and Debt Expense, Total	$412,755	$425,782	$431,235

Income_Per_Class_A_Unit_Detail

Income Per Class A Unit (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Per Class A Unit [Abstract]
Income (loss) from continuing operations, net of income attributable to noncontrolling interests									$328,519	($62,146)	$351,979
Income from discontinued operations, net of income attributable to noncontrolling interests									583,946	562,934	310,544
Net income attributable to Vornado Realty L.P.									912,465	500,788	662,523
Preferred unit distributions									-81,514	-83,965	-86,873
Preferred unit redemptions									0	-1,130	8,948
Net income attributable to Class A unitholders	544,287	139,134	81,333	66,197	-73,042	88,037	154,775	245,923	830,951	415,693	584,598
Earnings allocated to unvested participating securities									-4,260	-2,705	-3,413
Numerator for basic income per Class A unit									826,691	412,988	581,185
Convertible preferred unit distributions									97	0	113
Numerator for diluted income per Class A unit									$826,788	$412,988	$581,298
Denominator for basic income per Class A unit - weighted average units (in units)									198,213	197,551	197,082
Vornado stock options and restricted unit awards (in units)									1,557	1,092	1,002
Convertible preferred units (in units)									43	0	50
Denominator for diluted income per Class A unit - weighted average units and assumed conversions (in units)									199,813	198,643	198,134
INCOME (LOSS) PER CLASS A UNIT - BASIC:
Income (loss) from continuing operations, net (in dollars per unit)									$1.22	($0.76)	$1.37
Income from discontinued operations, net (in dollars per unit)									$2.95	$2.85	$1.58
Net income per Class A unit (in dollars per unit)	$2.73	$0.70	$0.41	$0.33	($0.37)	$0.44	$0.78	$1.24	$4.17	$2.09	$2.95
INCOME (LOSS) PER CLASS A UNIT - DILUTED:
Income (loss) from continuing operations, net (in dollars per unit)									$1.22	($0.75)	$1.36
Income from discontinued operations, net (in dollars per unit)									$2.92	$2.83	$1.57
Net income per Class A unit (in dollars per unit)	$2.71	$0.69	$0.40	$0.33	($0.37)	$0.44	$0.78	$1.23	$4.14	$2.08	$2.93

Income_Per_Class_A_Unit_Parent

Income Per Class A Unit (Parentheticals) (Details)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Per Class A Unit [Abstract]
Weighted average Class A unit equivalents of excluded dilutive securities due to anti-dilutive effect	116	818	2,796

Leases_Details

Leases (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Tenants	Tenants	Tenants
Concentration Risk [Line Items]
Number Of Tenants Contributing Ten Percent Or More Of Total Revenues	0	0	0
Operating Leases Future Minimum Payments Receivable [Abstract]
2015	$1,564,200
2016	1,509,781
2017	1,470,810
2018	1,395,708
2019	1,236,840
Thereafter	6,990,557
Percentage Rent	6,343	7,344	6,987
Operating Leases Future Minimum Payments Due [Abstract]
2015	29,060
2016	29,575
2017	31,141
2018	31,629
2019	32,136
Thereafter	1,208,483
Lessee Leasing Arrangements Operating Leases Term Of Contract	30 years
Rent Expense	36,329	35,920	27,634
Capital Leases Future Minimum Payments Due [Abstract]
2015	12,500
2016	12,500
2017	12,500
2018	12,500
2019	12,500
Thereafter	334,792
Total Minimum Obligations	397,292
Interest Portion	-157,292
Present Value Of Net Minimum Payments	240,000
Property Leased Under Capital Leases Cost	$249,253
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage Of Minimum Revenue Threshold Contributed By One Tenant	10.00%	10.00%	10.00%

Multiemployer_Plans_Details

Multiemployer Plans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Multiemployer Plans, Pension [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	$11,431	$10,223	$10,683
Multiemployer Plans, Period Contributions, Significance of Contributions	FALSE
Multiemployer Plans, Healthcare Benefit [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	$29,073	$26,262	$26,759

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Jan. 01, 2016
Loss Contingencies [Line Items]
Guarantees and master leases	$359,000,000
Outstanding letters of credit	39,552,000
Commitment to fund additional capital to partially owned entities	104,000,000
NBCR Losses [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence and in the aggregate	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 and in the aggregate	180,000,000
Vornado deductible, percentage of property value	5.00%
Vornado deductible, annual aggregate	180,000,000
All Risk And Rental Value [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence and in the aggregate	2,000,000,000
General Liability [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence and in the aggregate	300,000,000
Terrorism Acts [Member]
Loss Contingencies [Line Items]
Insurance limit per occurrence and in the aggregate	4,000,000,000
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 Percentage Of Balance Of Covered Loss		16.00%

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 15, 2015
Urban Edge Properties [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Cash Considerations Transferred During Spin Off				$225,000,000
Equity method ownership percentage				5.40%
Retail Segment Strip Shopping Centers [Member]
Related Party Transaction [Line Items]
Number Of Real Estate Properties	22
Retail Segment Strip Shopping Centers [Member] | Urban Edge Properties [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Number Of Real Estate Properties				79
Retail Segment Regional Malls [Member] | Urban Edge Properties [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Number Of Real Estate Properties				3
Warehouse [Member] | Urban Edge Properties [Member] | Subsequent Event [Member]
Related Party Transaction [Line Items]
Number Of Real Estate Properties				1
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	6.60%
Related Party Transaction Annual Fee Percentage	4.00%
Fee And Other Income From Related Parties (in US dollars)	535,000	$606,000	$794,000
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 $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Revenues	$597,010	$578,710	$574,411	$562,381	$570,977	$578,322	$582,258	$567,619	$2,312,512	$2,299,176	$2,332,724
Net income (loss) attributable to common shareholders	$544,287	$139,134	$81,333	$66,197	($73,042)	$88,037	$154,775	$245,923	$830,951	$415,693	$584,598
Net income (loss) per common share - Basic	$2.73	$0.70	$0.41	$0.33	($0.37)	$0.44	$0.78	$1.24	$4.17	$2.09	$2.95
Net income (loss) per common share - Diluted	$2.71	$0.69	$0.40	$0.33	($0.37)	$0.44	$0.78	$1.23	$4.14	$2.08	$2.93

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total Revenues	$597,010	$578,710	$574,411	$562,381	$570,977	$578,322	$582,258	$567,619	$2,312,512	$2,299,176	$2,332,724
Total expenses									1,622,619	1,624,625	1,738,381
Operating income									689,893	674,551	594,343
(Loss) income from partially owned entities									-58,131	-338,785	423,126
Income from Real Estate Fund									163,034	102,898	63,936
Interest and other investment income (loss), net									38,752	-24,887	-261,200
Interest and debt expense									-412,755	-425,782	-431,235
Net gain on disposition of wholly owned and partially owned assets									13,568	2,030	4,856
Income (loss) before income taxes									434,361	-9,975	393,826
Income tax (expense) benefit									-9,281	8,717	-8,132
Income (loss) from continuing operations									425,080	-1,258	385,694
Income from discontinued operations									583,946	565,998	308,847
Net income									1,009,026	564,740	694,541
Less net income attributable to noncontrolling interests in consolidated subsidiaries									-96,561	-63,952	-32,018
Net income attributable to Vornado Realty L.P.									912,465	500,788	662,523
Interest and debt expense (2)									654,398	758,781	760,523
Depreciation and amortization (2)									685,973	732,757	735,293
Income tax expense (benefit) (2)									24,248	26,371	7,026
EBITDA									2,277,084	2,018,697	2,165,365
Real estate at cost	16,822,358				15,392,968				16,822,358	15,392,968	15,287,078
Investments in partially owned entities	1,246,496				1,249,667				1,246,496	1,249,667	1,704,297
Total assets	21,248,320				20,097,224				21,248,320	20,097,224	22,065,049
New York Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues									1,520,845	1,470,907	1,319,470
Total expenses									946,466	910,498	835,563
Operating income									574,379	560,409	483,907
(Loss) income from partially owned entities									20,701	15,527	207,773
Income from Real Estate Fund									0	0	0
Interest and other investment income (loss), net									6,711	5,357	4,002
Interest and debt expense									-183,427	-181,966	-146,350
Net gain on disposition of wholly owned and partially owned assets									0	0	0
Income (loss) before income taxes									418,364	399,327	549,332
Income tax (expense) benefit									-4,305	-2,794	-3,491
Income (loss) from continuing operations									414,059	396,533	545,841
Income from discontinued operations									463,163	160,314	30,293
Net income									877,222	556,847	576,134
Less net income attributable to noncontrolling interests in consolidated subsidiaries									-8,626	-10,786	-2,138
Net income attributable to Vornado Realty L.P.									868,596	546,061	573,996
Interest and debt expense (2)									241,959	236,645	187,855
Depreciation and amortization (2)									324,239	293,974	252,257
Income tax expense (benefit) (2)									4,395	3,002	3,751
EBITDA									1,439,189	1,079,682	1,017,859
Real estate at cost	9,732,818				8,422,297				9,732,818	8,422,297	8,687,141
Investments in partially owned entities	1,036,130				904,278				1,036,130	904,278	576,336
Total assets	10,752,763				9,255,964				10,752,763	9,255,964	9,215,438
Washington DC Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Revenues									537,151	541,161	554,028
Total expenses									358,019	347,686	360,056
Operating income									179,132	193,475	193,972
(Loss) income from partially owned entities									-3,677	-6,968	-5,612
Income from Real Estate Fund									0	0	0
Interest and other investment income (loss), net									183	129	126
Interest and debt expense									-75,395	-102,277	-115,574
Net gain on disposition of wholly owned and partially owned assets									0	0	0
Income (loss) before income taxes									100,243	84,359	72,912
Income tax (expense) benefit									-242	14,031	-1,650
Income (loss) from continuing operations									100,001	98,390	71,262
Income from discontinued operations									0	0	167,766
Net income									100,001	98,390	239,028
Less net income attributable to noncontrolling interests in consolidated subsidiaries									0	0	0
Net income attributable to Vornado Realty L.P.									100,001	98,390	239,028
Interest and debt expense (2)									89,448	116,131	133,625
Depreciation and amortization (2)									145,853	142,409	157,816
Income tax expense (benefit) (2)									288	-15,707	1,943
EBITDA									335,590	341,223	532,412
Real estate at cost	4,383,418				4,243,048				4,383,418	4,243,048	4,171,879
Investments in partially owned entities	102,635				100,543				102,635	100,543	95,670
Total assets	4,310,974				4,107,636				4,310,974	4,107,636	4,196,694
Other Segment [Member]
Segment Reporting Information [Line Items]
Total Revenues									254,516	287,108	459,226
Total expenses									318,134	366,441	542,762
Operating income									-63,618	-79,333	-83,536
(Loss) income from partially owned entities									-75,155	-347,344	220,965
Income from Real Estate Fund									163,034	102,898	63,936
Interest and other investment income (loss), net									31,858	-30,373	-265,328
Interest and debt expense									-153,933	-141,539	-169,311
Net gain on disposition of wholly owned and partially owned assets									13,568	2,030	4,856
Income (loss) before income taxes									-84,246	-493,661	-228,418
Income tax (expense) benefit									-4,734	-2,520	-2,991
Income (loss) from continuing operations									-88,980	-496,181	-231,409
Income from discontinued operations									120,783	405,684	110,788
Net income									31,803	-90,497	-120,621
Less net income attributable to noncontrolling interests in consolidated subsidiaries									-87,935	-53,166	-29,880
Net income attributable to Vornado Realty L.P.									-56,132	-143,663	-150,501
Interest and debt expense (2)									322,991	406,005	439,043
Depreciation and amortization (2)									215,881	296,374	325,220
Income tax expense (benefit) (2)									19,565	39,076	1,332
EBITDA									502,305	597,792	615,094
Real estate at cost	2,706,122				2,727,623				2,706,122	2,727,623	2,428,058
Investments in partially owned entities	107,731				244,846				107,731	244,846	1,032,291
Total assets	$6,184,583				$6,733,624				$6,184,583	$6,733,624	$8,652,917

Segment_Information_Parentheti

Segment Information (Parentheticals) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	$2,277,084	$2,018,697	$2,165,365
Mark-to-market of investments in our deferred compensation plan	11,557	10,636	6,809
Retail Segment Strip Shopping Centers [Member]
Segment Reporting Information [Line Items]
Transaction Costs Spin Off	14,956
New York Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	1,439,189	1,079,682	1,017,859
New York Segment [Member] | Alexanders Inc [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	41,746	42,210	231,402
New York Segment [Member] | Alexanders Inc [Member] | Net Gain On Sale Of Real Estate [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Gain from Disposal of Discontinued Operation			179,934
New York Segment [Member] | Hotel Pennsylvania [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	30,753	30,723	28,455
New York Segment [Member] | Retail Properties [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	281,428	246,808	189,484
New York Segment [Member] | Office Building [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	1,085,262	759,941	568,518
New York Segment [Member] | Office Building [Member] | Net Gain On Sale Of Real Estate [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Gain from Disposal of Discontinued Operation	440,537	127,512
Washington DC Segment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	335,590	341,223	532,412
Washington DC Segment [Member] | Washington Dc Office Excluding Skyline Properties [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	266,859	268,373	449,448
Washington DC Segment [Member] | Washington Dc Office Excluding Skyline Properties [Member] | Net Gain On Sale Of Real Estate [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Gain from Disposal of Discontinued Operation			163,367
Washington DC Segment [Member] | Washington DC Skyline Properties [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	27,150	29,499	40,037
Washington DC Segment [Member] | Washington Dc Residential Property [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	41,581	43,351	42,927
Washington DC Segment [Member] | Office Building [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	294,009	297,872	489,485
Other Segment [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	502,305	597,792	615,094
Other Segment [Member] | Real Estate Fund [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	70,306	49,471	24,604
Other Segment [Member] | Our share of Toys "R" Us [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	103,632	-12,081	281,289
Other Segment [Member] | Merchandise Mart Other [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	79,636	74,270	62,470
Other Segment [Member] | Other Properties 555 California Street [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	48,844	42,667	46,167
Other Segment [Member] | India real estate ventures [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	6,434	5,841	3,654
Other Segment [Member] | LNR [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	20,443	75,202
Other Segment [Member] | Lexington Realty Trust [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	6,931	32,595
Other Segment [Member] | Lexington Realty Trust [Member] | Net Gains From Stock Issuances [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	0	28,763
Other Segment [Member] | Other Investments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	26,586	28,505	25,103
Other Segment [Member] | Corporate General And Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	-94,929	-94,904	-89,082
Other Segment [Member] | Investment Income and other, net [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	31,665	46,525	45,563
Other Segment [Member] | Urban Edge Properties And Residual Retail Properties Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	235,989	531,493	201,035
Other Segment [Member] | Acquisition and transaction related costs, and impairment losses [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	-16,392	-24,857	-17,386
Other Segment [Member] | Net Gain On Sale Of Marketable Securities Land Parcels And Residential Condominimums [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	13,568	56,868	4,856
Other Segment [Member] | Our share of debt satisfaction gains and net gains on sale of real estate [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	13,000	0	0
Other Segment [Member] | Suffolk Downs impairment loss and loan reserve [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	-10,263	0	0
Other Segment [Member] | Our share of impairment losses of partially owned entities [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	-5,771	0	-4,936
Other Segment [Member] | Loss On Sale Of J C Penney Common Shares [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	-127,888	-300,752
Other Segment [Member] | Severance Costs [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	-5,492	-3,005
Other Segment [Member] | Merchandise Mart Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	0	93,588
Other Segment [Member] | Other EBITDA attributable to identifiable investments [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	335,438	216,047	551,084
Other Segment [Member] | Independence Plaza [Member] | Net Gain On Asset Purchase [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	0	0	105,366
Other Segment [Member] | Income before net realized / unrealized gains (Operations) [Member] | Real Estate Fund [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	8,056	7,752	6,385
Other Segment [Member] | Carried Interest [Member] | Real Estate Fund [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	24,715	18,230	4,379
Other Segment [Member] | Net realized/unrealized gains on investments [Member] | Real Estate Fund [Member]
Segment Reporting Information [Line Items]
Earnings Before Interest, Taxes, Depreciation, and Amortization	$37,535	$23,489	$13,840