Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Apr. 23, 2021	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (5,182)	$ (98,606)	$ (1,961,989)	$ (52,475)	$ (1,105,366)
Other comprehensive losses, net of tax:
Reclassification adjustment for loss on derivative financial instruments included in net loss		21			18
Total other comprehensive loss		21			18
Comprehensive loss	$ (5,182)	$ (98,585)	$ (1,961,989)	$ (52,475)	$ (1,105,348)