Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 56,915	$ 674,993	$ 81,046
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization, including amortization of debt issuance costs	31,395	36,363	37,086
Straight-lining of rental income	(3,707)	(4,475)	(12,609)
Stock-based compensation expense	394	300	300
Reduction of income tax liability	(206)	0	(2,561)
Net gain on sale of real estate	0	(599,628)	0
Changes in operating assets and liabilities:
Tenant and other receivables, net	(972)	234	1,672
Other assets	(472)	4,318	(5,484)
Amounts due to Vornado	(3,138)	(2,405)	(2,445)
Accounts payable and accrued expenses	(6,284)	(107)	(4,547)
Other liabilities	(42)	114	56
Net cash provided by operating activities	73,883	109,707	92,514
CASH FLOWS FROM INVESTING ACTIVITIES
Construction in progress and real estate additions	(7,671)	(7,351)	(14,415)
Restricted cash	351	(1,626)	(3,202)
Proceeds from sale of real estate	0	714,054	0
Proceeds from maturing short-term investments	0	5,000	23,000
Purchases of short-term investments	0	0	(5,000)
Net cash (used in) provided by investing activities	(7,320)	710,077	383
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid, including a special dividend of $623,178 in 2012	(56,197)	(699,791)	(61,277)
Debt repayments	(15,957)	(265,016)	(508,479)
Debt issuance costs	(87)	(400)	(6,142)
Acquisition of the noncontrolling interest	0	(7,800)	0
Proceeds from borrowing	0	0	593,000
Distributions to the noncontrolling interest	0	0	(600)
Net cash (used in) provided by financing activities	(72,241)	(973,007)	16,502
Net (decrease) increase in cash and cash equivalents	(5,678)	(153,223)	109,399
Cash and cash equivalents at beginning of year	353,396	506,619	397,220
Cash and cash equivalents at end of year	347,718	353,396	506,619
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments for interest	42,121	47,932	53,343
NON-CASH TRANSACTIONS
Liability for real estate additions included in accounts payable and accrued expenses	1,084	221	3,052
Marketable securities received in connection with the sale of real estate	0	30,000	0
Commission payable to Vornado incurred in connection with the sale of real estate	0	7,510	0
Write-off of fully amortized and/or depreciated assets	$ 0	$ 648	$ 6,799