Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (27)	$ 4,423	$ 6,020
State	88	1,038	507
Foreign	1,548	626	3,159
Total current	1,609	6,087	9,686
Deferred:
Federal	(4,730)	1,961	17,034
State	506	(73)	643
Foreign	108	275	(470)
Total deferred	(4,116)	2,163	17,207
Total income tax expense (benefit)	$ (2,507)	$ 8,250	$ 26,893