Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Real estate, at cost:
Land	$ 44,971	$ 44,971
Buildings and leasehold improvements	870,630	869,681
Development and construction in progress	6,085	4,924
Total	921,686	919,576
Accumulated depreciation and amortization	(191,526)	(185,375)
Real estate, net	730,160	734,201
Cash and cash equivalents	355,328	347,718
Restricted cash	85,534	90,044
Marketable securities	33,363	31,522
Tenant and other receivables, net of allowance for doubtful accounts of $1,960 and $1,993, respectively	2,732	2,925
Receivable arising from the straight-lining of rents	178,042	177,401
Deferred lease and other property costs, net, including unamortized leasing fees to Vornado of $35,868 and $36,728, respectively	49,161	50,273
Deferred debt issuance costs, net of accumulated amortization of $9,243 and $19,187, respectively	6,844	3,246
Other assets	10,879	20,394
Total assets	1,452,043	1,457,724
Liabilities and Equity
Mortgages payable	1,035,022	1,049,959
Amounts due to Vornado	42,492	43,307
Accounts payable and accrued expenses	37,004	27,450
Other liabilities	3,424	3,427
Total liabilities	1,117,942	1,124,143
Commitments and contingencies
Preferred stock: $1.00 par value per share; authorized, 3,000,000 shares; issued and outstanding, none	0	0
Common stock: $1.00 par value per share; authorized, 10,000,000 shares; issued, 5,173,450 shares; outstanding, 5,106,196 shares	5,173	5,173
Additional capital	29,745	29,745
Retained earnings	296,152	297,515
Accumulated other comprehensive income	3,405	1,522
Equity before treasury stock	334,475	333,955
Treasury stock: 67,254 shares, at cost	(374)	(374)
Total equity	334,101	333,581
Total liabilities and equity	$ 1,452,043	$ 1,457,724