Stock-Based Compensation (Summary Of Restricted Stock 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 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested share units at beginning of period, Number of Share Units			1,170				1,170
Granted, Number of Share Units							0
Actual vested, Number of share Units							(1,170)
Nonvested share units at end of period, Number of Share Units
Nonvested share units at beginning of period, Weighted Average Fair Value			$ 42.75				$ 42.75
Granted, Weighted Average Fair Value							0	$ 42.75
Actual vested, Weighted Average Fair Value							(42.75)
Nonvested share units at end of period, Weighted Average Fair Value