Income Taxes (Schedule Of Reconciliation Of The U.S. Federal Statutory Rate To Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	21.00%	21.00%	21.00%
State income taxes	3.00%	2.70%	3.10%
Effective Income Tax Rate Reconciliation, Deduction, Percent	(0.30%)	(0.50%)	(0.90%)
Other	0.30%	0.20%	0.10%
Effective tax rate	24.00%	23.40%	23.30%