Stock-Based Compensation (Summary Of RSU Transactions) (Details) - $ / shares	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Share Units	17,054	222,782	4,736	57,052
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested share units at beginning of period, Number of Share Units		180,306			180,306
Granted, Number of Share Units					73,696
Actual vested, Number of share Units					(52,611)
Forfeited, Number of Share Units					(3,794)
Nonvested share units at end of period, Number of Share Units	197,597				197,597
Nonvested share units at beginning of period, Weighted Average Fair Value		$ 45.94			$ 45.94
Granted, Weighted Average Fair Value					45.61	$ 45.10
Actual vested, Weighted Average Fair Value					49.26
Forfeited, Weighted Average Fair Value					44.99
Nonvested share units at end of period, Weighted Average Fair Value	$ 44.94				$ 44.94