Income Taxes (Details 2) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Deferred income tax provision (benefit)									$ 29,197	$ 36,148	$ (36,274)
Provision (benefit) for income taxes	$ 3,921	$ 10,006	$ 14,861	$ 4,742	$ 12,569	$ 24,090	$ (6,672)	$ 16,526	33,530	46,513	(17,254)
Continuing Operations [Member]
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Foreign									4,301	10,430	15,546
U.S. federal									0	(195)	2,067
U.S. state									32	132	1,435
Current income tax provision (benefit)									4,333	10,367	19,048
Foreign									4,747	2,024	(10,222)
U.S. federal									21,865	30,074	(23,756)
U.S. state									2,585	4,048	(2,324)
Deferred income tax provision (benefit)									29,197	36,146	(36,302)
Provision (benefit) for income taxes									$ 33,530	$ 46,513	$ (17,254)