Acquisitions (Details) (USD $)	3 Months Ended		6 Months Ended				6 Months Ended				3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Inception to Date [Member]	Jun. 30, 2011 Real Estate Fund [Member] One Park Avenue [Member]	Jun. 30, 2011 One Park Avenue [Member] sqft	Mar. 31, 2011 One Park Avenue [Member]	Mar. 01, 2011 One Park Avenue [Member]	Jun. 30, 2011 One Park Avenue [Member] Vornado Realty Trust Excluding Real Estate Fund [Member]	Jun. 30, 2011 Real Estate Fund [Member]	Jun. 30, 2010 Real Estate Fund [Member]	Jun. 30, 2011 Real Estate Fund [Member]	Jun. 30, 2010 Real Estate Fund [Member]	Jun. 30, 2011 Real Estate Fund [Member] Unrealized Gain From Mark To Market [Member]	Jun. 30, 2011 Real Estate Fund [Member] Unrealized Gain From Mark To Market [Member]	Jun. 30, 2011 Real Estate Fund [Member] Realized Gain [Member]	Jun. 30, 2011 Real Estate Fund [Member] Realized Gain [Member]	Jun. 30, 2011 Real Estate Fund [Member] Carried Interest [Member]	Jun. 30, 2011 Real Estate Fund [Member] Carried Interest [Member]
Vornado Total Equity Commitments For The Fund	$ 200,000,000		$ 200,000,000
Total expected equity commitments for the Fund	800,000,000		800,000,000
Investment period for commitments of the Fund, years	3		3
Term of the Fund, years	8		8
The Fund organization costs	403,000		3,451,000
Proceeds From Partnership Contribution					256,100,000
Vornado's contribution to the Real Estate Fund					64,031,000
Square Footage Of Real Estate Property							932,000
Number Of Investments Made By Fund			5
Debt Instrument, Interest Rate at Period End									500.00%
Investments Made By The Fund	243,836,000		243,836,000
Business Acquisition Cost Of Acquired Entity Purchase Price									374,000,000
Business Acquisition Cost Of Acquired Entity Cash Paid									137,000,000
Business Acquisition Cost Of Acquired Entity Liabilities Incurred								250,000,000
Equity method ownership percentage						6470.00%	9500.00%			3030.00%
Income from Real Estate Fund	19,058,000	0	20,138,000	0											12,872,000	13,570,000	3,085,000	3,085,000	2,140,000	2,140,000
Net (income) loss attributable to noncontrolling interests in consolidated subsidiaries	13,657,000	981,000	15,007,000	1,194,000							12,102,000	0	12,028,000	0
Income From Real Estate Fund Attributable To Parent Company											6,956,000		8,110,000
Fee and Other Income	$ 41,811,000	$ 32,157,000	$ 76,104,000	$ 73,084,000							$ 865,000		$ 1,165,000