Income Taxes - Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ (14,837)	$ 1,480	$ 32,387
State	1,283	178	3,359
Foreign	2,350	2,090	2,259
Total current provision	(11,204)	3,748	38,005
Deferred:
Federal	40,338	42,719	(28,604)
State	1,453	4,433	(2,296)
Foreign	(2,583)	(698)	(1,528)
Total deferred provision	39,208	46,454	(32,428)
Changes in tax rate	(216)	266	(84)
Changes in valuation allowance	1,494	(3,739)	793
Total income tax (benefit) expense	$ 29,282	$ 46,729	$ 6,286