Stock-Based Compensation (Summary Of PSU 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
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					161,981
Performance criteria adjustment, Number of Share Units					9,521
Actual vested, Number of share Units					(168,549)
Forfeited, Number of Share Units					(9,837)
Nonvested share units at end of period, Number of Share Units	549,578				549,578
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					42.60
Actual vested, Weighted Average Fair Value					53.77
Forfeited, Weighted Average Fair Value					43.94
Nonvested share units at end of period, Weighted Average Fair Value	$ 40.05				$ 40.05