Revenue Recognition Of Non-Interest Income (Schedule Of Disaggregation Of Insurance Service And Other Fees) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	$ 3,498	$ 3,383	$ 8,648	$ 8,249
Commercial Property And Casualty Insurance Commissions [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	1,670	1,706	3,723	3,525
Personal Property And Casualty Insurance Commissions [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	978	901	2,716	2,554
Employee Benefits Sales Commissions [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	279	206	640	649
Profit Sharing And Contingent Revenue [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	398	410	1,024	971
Wealth Management And Other Financial Services [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	147	137	436	457
Other Insurance-Related Revenue [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	$ 26	$ 23	$ 109	$ 93