Income Taxes - Components of Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current expense (benefit)
Federal and foreign	$ (2,147)	$ (6,509)	$ 19,546
State	982	301	120
Total current expense (benefit)	(1,165)	(6,208)	19,666
Deferred expense (benefit)
Federal and foreign	(27,404)	(11,765)	1,331
State	(1,239)	(59)	362
Total deferred expense (benefit)	(28,643)	(11,824)	1,693
Total income tax expense (benefit)	$ (29,808)	$ (18,032)	$ 21,359