Partner's Capital (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		0 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Jan. 25, 2013 Series L Preferred Unit [Member] Public Offering [Member] Redeemable Preferred Unit [Member]	Feb. 19, 2013 Series F Preferred Unit [Member]	Feb. 19, 2013 Series H Preferred Unit [Member]	Feb. 19, 2013 Series F And Series H Preferred Unit [Member]
Details Of Preferred Shares Of Beneficial Interest [Abstract]
Issuance of Series L Cumulative Redeemable Preferred Shares			12,000
Preferred Stock Dividend Rate Percentage			5.40%	6.75%	6.75%
Preferred Stock, Par or Stated Value Per Share			$ 25.00
Aggregate net proceeds after underwriters discounts and issuance costs			$ 290,710
Preferred Stock Issued Additional Disclosure			Vornado retained aggregate net proceeds of $290,710,000, after underwriters’ discounts and issuance costs and contributed the net proceeds to us in exchange for 12,000,000 Series L Preferred Units (with economic terms that mirror those of the Series L Preferred Shares).
Purchase Of Outstanding Preferred Units	$ 262,500	$ 0				$ 262,500