Accounts Payable and Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Payables and Accruals [Abstract]
Accounts payable and accrued expenses	$ 68,488		$ 57,657
Payable to the estate of Leona M. Helmsley	18,367	[1]	18,367	[1]
Accrued interest payable	5,953		4,074
Due to affiliated companies	3,755		1,810
Accounts payable and accrued expenses	$ 96,563		$ 81,908

[1] Reflects a payable to the estate of Leona M. Helmsley for New York City transfer taxes.