Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (35)	$ 43	$ (555)
State	499	620	(273)
Foreign	109	269	139
Total	573	932	(689)
Deferred:
Federal	17,406	(2,137)	(23,245)
State	13,799	(1,277)	(10,684)
Foreign	(46)	4	117
Total	31,159	(3,410)	(33,812)
Income tax expense (benefit)	$ 31,732	$ (2,478)	$ (34,501)