Income Taxes (Income Tax Provision (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 18, 2020	Dec. 31, 2021	Dec. 31, 2019
Current income tax expense (benefit)
Federal	$ 0	$ (6,407)	$ 0	$ 2,645
State	30	(853)	403	1,236
Total current income tax expense (benefit)	30	(7,260)	403	3,881
Deferred income tax expense (benefit)
Federal	0	(319,011)	0	89,950
State	(2,556)	(89,858)	364	10,521
Total deferred income tax expense (benefit)	(2,556)	(408,869)	364	100,471
Total income tax expense (benefit)	$ (2,526)	$ (416,129)	$ 767	$ 104,352