Stock-Based Compensation (Summary Of RSU Transactions) (Details) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of Share Units	133	17,054	222,782	6,555	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							75,414
Actual vested, Number of share Units							(52,744)
Forfeited, Number of Share Units							(5,104)
Nonvested share units at end of period, Number of Share Units	197,872						197,872
Nonvested share units at beginning of period, Weighted Average Fair Value			$ 45.94				$ 45.94
Granted, Weighted Average Fair Value							45.53	$ 45.10
Actual vested, Weighted Average Fair Value							49.25
Forfeited, Weighted Average Fair Value							45.54
Nonvested share units at end of period, Weighted Average Fair Value	$ 45.07						$ 45.07