Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities [Abstract]
Accrued interest payable	$ 14,129	$ 16,949
Swaps, at fair value	46,954	70,526
Dividends and dividend equivalents declared and unpaid	74,657	74,575	$ 74,529
Securitized debt	0	21,868
Accrued expenses and other liabilities	19,612	19,610
Total Other Liabilities	$ 155,352	$ 203,528