Accounts Payable, Accrued Expenses and Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Payables and Accruals [Abstract]
Accounts payable and accrued expenses	$ 30,204	$ 21,507
Deferred federal income tax liability	33,178	48,217	40,410
Accrued interest payable	39,213	38,273
Lease discounts, net of amortization of $7,328 and $6,458 respectively	9,066	596
Total accounts payable, accrued expenses and other liabilities	111,661	108,593
Deferred revenue, leases, accumulated amortization	$ 6,458	$ 7,328