Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Real estate, at cost:
Land	$ 44,971	$ 44,971
Buildings and leasehold improvements	869,204	864,609
Development and construction in progress	4,035	2,212
Total	918,210	911,792
Accumulated depreciation and amortization	(179,232)	(160,826)
Real estate, net	738,978	750,966
Cash and cash equivalents	347,553	353,396
Restricted cash	90,470	90,395
Marketable securities	30,210	31,206
Tenant and other receivables, net of allowance for doubtful accounts of $1,938 and $2,219, respectively	2,301	1,953
Receivable arising from the straight-lining of rents	176,716	173,694
Deferred lease and other property costs, net, including unamortized leasing fees to Vornado of $37,588 and $39,910, respectively	51,384	54,461
Deferred debt issuance costs, net of accumulated amortization of $18,594 and $16,834, respectively	3,837	5,522
Other assets	29,971	20,217
Total assets	1,471,420	1,481,810
Liabilities and Equity
Mortgages payable	1,054,046	1,065,916
Amounts due to Vornado	44,032	46,445
Accounts payable and accrued expenses	39,382	33,621
Other liabilities	3,429	3,675
Total liabilities	1,140,889	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, 5,106,196 shares and 5,105,936 shares, respectively	5,173	5,173
Additional capital	29,745	29,352
Retained earnings	295,777	296,797
Accumulated other comprehensive income	210	1,206
Equity before treasury stock	330,905	332,528
Treasury stock: 67,254 shares and 67,514 shares, respectively, at cost	(374)	(375)
Total equity	330,531	332,153
Total liabilities and equity	$ 1,471,420	$ 1,481,810