Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current income taxes:
Federal	$ (4,624)	$ (258)	$ (1,315)
State	1,015	33	1,317
Foreign	536	(554)	844
Total current income tax expense (benefit)	(3,073)	(779)	846
Deferred income taxes:
Federal	(9,928)	(49,115)	(38,100)
State	3,806	7,611	11,075
Total deferred income tax expense (benefit)	(6,122)	(41,504)	(27,025)
Total income tax expense (benefit)	$ (9,195)	(42,283)	(26,179)
Income tax benefit related to discontinued operation		$ 5,900	$ 14,200