Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 58,010	$ 60,275
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of debt issuance costs)	28,488	27,614
Straight-lining of rental income	(3,824)	(9,961)
Reversal of income tax liability	0	(2,561)
Stock-based compensation expense	300	300
Change in operating assets and liabilities:
Accounts receivable, net	(1,083)	1,493
Other assets	(15,703)	(15,225)
Amounts due to Vornado	(1,546)	(477)
Accounts payable and accrued expenses	8,034	6,408
Income tax liability of taxable REIT subsidiary	22	80
Other liabilities	(22)	(23)
Net cash provided by operating activities	72,676	67,923
CASH FLOWS FROM INVESTING ACTIVITIES
Construction in progress and real estate additions	(6,502)	(10,226)
Proceeds from maturing short-term investments	5,000	23,000
Restricted cash	(416)	(2,465)
Purchases of short-term investments	0	(5,000)
Net cash (used in) provided by investing activities	(1,918)	5,309
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid	(57,458)	(45,956)
Debt repayments	(11,156)	(160,037)
Debt issuance costs	(400)	(4,269)
Proceeds from borrowings	0	250,000
Distributions to the noncontrolling interest	0	(600)
Net cash (used in) provided by financing activities	(69,014)	39,138
Net increase in cash and cash equivalents	1,744	112,370
Cash and cash equivalents at beginning of period	506,619	397,220
Cash and cash equivalents at end of period	508,363	509,590
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments for interest	36,058	40,528
NON-CASH TRANSACTIONS
Non-cash additions to real estate included in accounts payable and accrued expenses	1,038	3,789
Write-off of fully amortized and depreciated assets	$ 648	$ 6,510