Income Taxes - Current and Deferred Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Current income tax expense
Federal	$ 5,057	$ 288
State	341	74
Total current income tax expense	5,398	362
Deferred tax expense (benefit)
Federal	21,909	(15,130)
Foreign	270
State	(172)	(353)
Total deferred income tax expense (benefit)	22,007	(15,483)
Total income tax expense (benefit) from continuing operations	$ 27,405	$ (15,121)