Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 19,424	$ 17,812
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of debt issuance costs)	9,505	8,949
Straight-lining of rental income	(1,469)	(3,743)
Changes in operating assets and liabilities:
Accounts receivable, net	(677)	(410)
Other assets	10,481	9,065
Amounts due to Vornado	(655)	572
Accounts payable and accrued expenses	7,009	8,320
Income tax liability of taxable REIT subsidiary	7	(11)
Other liabilities	(7)	(7)
Net cash provided by operating activities	43,618	40,547
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from maturing short-term investments	5,000	23,000
Construction in progress and real estate additions	(2,709)	(6,177)
Restricted cash	968	(3,520)
Net cash provided by investing activities	3,259	13,303
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid	(19,151)	(15,318)
Debt repayments	(3,698)	(3,809)
Debt issuance costs	(395)	(12)
Net cash used in financing activities	(23,244)	(19,139)
Net increase in cash and cash equivalents	23,633	34,711
Cash and cash equivalents at beginning of period	506,619	397,220
Cash and cash equivalents at end of period	530,252	431,931
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments for interest	12,258	13,025
NON-CASH TRANSACTIONS
Non-cash additions to real estate included in accounts payable and accrued expenses	1,806	3,594
Write-off of fully amortized and depreciated assets	$ 624	$ 1,503