Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 27,301	$ 38,662
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization, including amortization of debt issuance costs	15,660	18,970
Straight-lining of rental income	(2,210)	(2,664)
Stock-based compensation expense	394	300
Change in operating assets and liabilities:
Tenant and other receivables, net	(348)	351
Other assets	(17,772)	(24,935)
Amounts due to Vornado	(1,562)	(860)
Accounts payable and accrued expenses	(5,099)	(577)
Other liabilities	(32)	(1)
Net cash provided by operating activities	16,332	29,246
CASH FLOWS FROM INVESTING ACTIVITIES
Construction in progress and real estate additions	(3,219)	(5,128)
Restricted cash	1,431	(855)
Proceeds from maturing short-term investments	0	5,000
Net cash used in investing activities	(1,788)	(983)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid	(28,094)	(38,303)
Debt repayments	(7,888)	(7,400)
Debt issuance costs	(85)	(400)
Net cash used in financing activities	(36,067)	(46,103)
Net decrease in cash and cash equivalents	(21,523)	(17,840)
Cash and cash equivalents at beginning of period	353,396	506,619
Cash and cash equivalents at end of period	331,873	488,779
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments for interest	21,107	23,967
NON-CASH TRANSACTIONS
Non-cash additions to real estate included in accounts payable and accrued expenses	2,284	1,349
Change in unrealized net gain on available-for-sale securities	1,429	0
Write-off of fully amortized and depreciated assets	$ 0	$ 624