Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accounts payable and accrued expenses	$ 85,161	$ 83,352
Payable to the estate of Leona M. Helmsley	18,367	18,367
Interest rate swap agreements liability	32,157	1,922
Accrued interest payable	5,996	5,555
Due to affiliated companies	1,615	1,903
Accounts payable and accrued expenses	$ 143,296	$ 111,099