Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jul. 09, 2020
Components of the provision for income taxes
Federal	$ 0	$ 3,826	$ 0	$ 3,826
State	173	(320)	(402)	(1,109)
Deferred portion of income tax (expense) benefit	22,796	(19,617)	159,064	13,620
Income tax (expense) benefit	$ 22,969	$ (16,111)	$ 158,662	$ 16,337
Effective tax rate	18.90%	27.60%	20.90%	16.10%
Proceeds from income tax refunds					$ 7,600