Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current income tax (benefit) provision
Federal income tax	$ 0	$ 0	$ (455)
State income tax	0	0	0
Net current income tax benefit	0	0	(455)
Deferred income tax (benefit) provision
Federal income tax	(25,675)	29,171	(20,457)
State income tax	(19,924)	6,361	13,221
Net deferred income tax (benefit) provision	(45,599)	35,532	(7,236)
Deferred income tax provision (benefit)
Federal tax (benefit) expense at statutory rate	(125,823)	33,441	61,543
State income tax	(20,607)	6,141	16,181
Permanent differences	(3,114)	(4,267)	(2,488)
AMT credit refundable	0	0	455
Change in federal valuation allowance	103,262	0	(80,003)
Change in state valuation allowance	683	217	(2,924)
Net deferred income tax (benefit) provision	(45,599)	35,532	(7,236)
Net current income tax benefit	0	0	(455)
Total income tax (benefit) provision	$ (45,599)	$ 35,532	$ (7,691)