Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Real estate, at cost:
Land	$ 44,971	$ 44,971
Buildings and leasehold improvements	866,038	864,609
Development and construction in progress	2,432	2,212
Total	913,441	911,792
Accumulated depreciation and amortization	(166,940)	(160,826)
Real estate, net	746,501	750,966
Cash and cash equivalents	368,508	353,396
Restricted cash	89,476	90,395
Marketable securities	34,460	31,206
Tenant and other receivables, net of allowance for doubtful accounts of $2,294 and $2,219, respectively	2,377	1,953
Receivable arising from the straight-lining of rents	174,643	173,694
Deferred lease and other property costs, net, including unamortized leasing fees to Vornado of $39,218 and $39,910, respectively	53,517	54,461
Deferred debt issuance costs, net of accumulated amortization of $17,410 and $16,834, respectively	5,018	5,522
Other assets	10,763	20,217
Total assets	1,485,263	1,481,810
Liabilities and Equity
Mortgages Payable	1,061,953	1,065,916
Amounts due to Vornado	45,623	46,445
Accounts payable and accrued expenses	38,491	33,621
Other liabilities	3,674	3,675
Total liabilities	1,149,741	1,149,657
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, 5,105,936 shares	5,173	5,173
Additional capital	29,352	29,352
Retained earnings	296,912	296,797
Accumulated other comprehensive income	4,460	1,206
Equity before treasury stock	335,897	332,528
Treasury stock: 67,514 shares, at cost	(375)	(375)
Total equity	335,522	332,153
Total liabilities and equity	$ 1,485,263	$ 1,481,810