Income Taxes (Reconciliation Of Provision For Income Taxes) (Details)	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
Income Taxes [Abstract]
Consolidated tax provision at federal statutory rate	21.00%	21.00%	21.00%	21.00%
State income tax provisions, net of federal income tax benefit	0.50%	3.10%	13.70%	4.80%
Tax reserve adjustment		0.10%		0.60%
Fresh start and reorganization adjustments	(24.90%)
Changes in certain deferred tax balances		(8.20%)	23.40%	(0.50%)
Nondeductible Executive Compensation under Sec. 162(m)			12.20%	2.00%
Sec. 162(f) nondeductible penalties			3.10%	0.30%
All other, net	0.30%	1.20%	1.90%	(1.80%)
Effective tax rate	(3.10%)	17.20%	75.30%	26.40%