Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Real estate, at cost:
Land	$ 44,971	$ 44,971
Buildings and leasehold improvements	867,943	864,609
Development and construction in progress	3,410	2,212
Total	916,324	911,792
Accumulated depreciation and amortization	(173,068)	(160,826)
Real estate, net	743,256	750,966
Cash and cash equivalents	331,873	353,396
Restricted cash	88,964	90,395
Marketable securities	32,635	31,206
Tenant and other receivables, net of allowance for doubtful accounts of $2,125 and $2,219, respectively	2,301	1,953
Receivable arising from the straight-lining of rents	175,904	173,694
Deferred lease and other property costs, net, including unamortized leasing fees to Vornado of $38,435 and $39,910, respectively	52,482	54,461
Deferred debt issuance costs, net of accumulated amortization of $18,002 and $16,834, respectively	4,429	5,522
Other assets	37,728	20,217
Total assets	1,469,572	1,481,810
Liabilities and Equity
Mortgages payable	1,058,028	1,065,916
Amounts due to Vornado	44,883	46,445
Accounts payable and accrued expenses	29,835	33,621
Other liabilities	3,643	3,675
Total liabilities	1,136,389	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	296,004	296,797
Accumulated other comprehensive income	2,635	1,206
Equity before treasury stock	333,557	332,528
Treasury stock: 67,254 shares and 67,514 shares, respectively, at cost	(374)	(375)
Total equity	333,183	332,153
Total liabilities and equity	$ 1,469,572	$ 1,481,810