Income Taxes (Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Statutory federal expense (benefit)	$ 30,555	$ (58,307)	$ (5,481)
Foreign tax rate differential	1,083	3,534	3,844
State and local tax expense (benefit)	3,941	(230)	138
Effect of REIT election	205,317
Permanent differences	(3,577)	4,892	5,644
Foreign dividend income			3,700
Foreign tax rate change			1,374
Foreign exchange rate changes	(5,822)	9,212	(799)
Other	1,753	3,200	(216)
Valuation allowance	(222,185)	46,760	431
Total provision for income taxes	$ 11,065	$ 9,061	$ 8,635