Accounts Payable and Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Payables and Accruals [Abstract]
Accounts payable and accrued expenses	$ 77,234		$ 68,488
Payable to the estate of Leona M. Helmsley	18,367	[1]	18,367	[1]
Accrued interest payable	4,152		5,953
Due to affiliated companies	2,044		3,755
Accounts payable and accrued expenses	$ 101,797		$ 96,563

[1] Reflects a payable to the estate of Leona M. Helmsley in the amount of New York City transfer taxes which would have been payable in absence of the estate's exemption from such tax.