Fresh Start Accounting (Reorganization) (Details) - USD ($)	1 Months Ended	5 Months Ended
	Feb. 02, 2021	Jun. 30, 2021
Fresh Start Accounting [Abstract]
Gain on settlement of liabilities subject to compromise	$ 667,258,000
Allowed claim adjustment for Class 6 claims	(232,022,000)
Loss on fresh start adjustment	(77,376,000)
Professional fees	(16,005,000)
Rejected leases	13,347,000
Debtor in possession credit facility costs	(12,000,000)
Lease rejection damages	(4,956,000)
Extinguishment of RSUs for the Predecessor's incentive plan	(988,000)
Other items	(1,698,000)
Total reorganization income (expense), net	335,560,000	$ 0
Adjustment for discontinued operations	$ 16,400,000