Stock-Based Compensation (Summary Of PSU 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
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested share units at beginning of period, Number of Share Units			556,462				556,462
Granted, Number of Share Units							162,030
Performance criteria adjustment, Number of Share Units							(14,805)
Actual vested, Number of share Units							(168,549)
Forfeited, Number of Share Units							(12,513)
Nonvested share units at end of period, Number of Share Units	522,625						522,625
Nonvested share units at beginning of period, Weighted Average Fair Value			$ 42.77				$ 42.77
Granted, Weighted Average Fair Value							45.06	$ 42.31
Performance criteria adjustment, Weighted Average Fair Value							43.36
Actual vested, Weighted Average Fair Value							53.77
Forfeited, Weighted Average Fair Value							44.10
Nonvested share units at end of period, Weighted Average Fair Value	$ 39.88						$ 39.88