Income Taxes (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Foreign									$ 2,821	$ 4,301	$ 10,430
U.S. federal									0	0	(195)
U.S. state									0	32	132
Current income tax provision (benefit)									2,821	4,333	10,367
Foreign									4,071	4,747	2,024
U.S. federal									5,142	21,865	30,074
U.S. state									(766)	2,585	4,048
Deferred income tax provision (benefit)									8,447	29,197	36,146
Provision (benefit) for income taxes	$ 16,119	$ 11,898	$ 4,658	$ (21,407)	$ 3,921	$ 10,006	$ 14,861	$ 4,742	$ 11,268	$ 33,530	$ 46,513