Income Taxes Income Taxes - Current and Deferred Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current tax provision (benefit):
U.S. federal	$ 75	$ 0	$ (1,495)
State	377	912	172
Total current	452	912	(1,323)
Deferred tax provision (benefit):
U.S. federal	(35,597)	6,197	(67,443)
State	(4,000)	(959)	7,683
Total deferred	(39,597)	5,238	(59,760)
Provision for (benefit from) income taxes	$ (39,145)	$ 6,150	$ (61,083)