Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 02, 2021	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2020
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed expected tax benefit	$ 69,125	$ (32,635)	$ 44,798	$ (53,431)
State and foreign income taxes	6,217	(17,893)	(350)	5,026
Valuation allowance	(46,208)	0	(13,140)	19,024
Gain on Settlement of Liabilities Subject to Compromise	(89,905)	0		0
Reduction in value of assets	87,316	19,154		0
Fresh Start Adjustments	29,099	0		0
Worthless stock deduction			(103,992)
Foreign Tax Credit			(5,161)
Other	4,359	(1,924)	126	2,493
Income tax (expense) benefit	$ 60,003	$ (33,298)	$ (77,719)	$ (26,888)