Income Taxes (Current and Deferred Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
U.S. federal	$ 300	$ 59	$ 988
Non-U.S.	9,142	10,180	8,548
U.S. state and local	162	157	617
Total current income tax provision (benefit)	9,604	10,396	10,153
Deferred:
U.S. federal	(44,068)	227	564
Non-U.S.	(3,078)	(2,066)	2,517
U.S. state and local	(674)	10	7
Total deferred income tax provision (benefit)	(47,820)	(1,829)	3,088
Total:
U.S. federal	(43,768)	286	1,552
Non-U.S.	6,064	8,114	11,065
U.S. state and local	(512)	167	624
Total income tax provision (benefit)	$ (38,216)	$ 8,567	$ 13,241