Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jul. 30, 2020
Components of the provision for income taxes
Federal	$ 0	$ 0	$ 0	$ 0
State	(236)	176	(575)	(789)
Deferred portion of income tax (expense) benefit	36,921	(13,766)	136,268	33,237
Income tax (expense) benefit	$ 36,685	$ (13,590)	$ 135,693	$ 32,448
Effective tax rate	29.10%	21.20%	21.30%	20.30%
Subsequent Event [Member]
Proceeds from income tax refunds					$ 7,600