Income Taxes (Reconciliation Of Provision For Income Taxes) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 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	(4.30%)	14.70%	5.10%	13.10%
Changes in certain deferred tax balances		2.10%		1.50%
Tax reserve adjustment	(3.00%)		(3.10%)
Tax Credit	6.00%		6.30%
Sec. 162(m) - nondeductible Executive Compensation	(18.50%)	1.50%	(19.10%)	2.50%
All other, net	(0.50%)	(0.80%)	(0.50%)	(0.30%)
Effective tax rate	0.70%	38.50%	9.70%	37.80%