Revenue Recognition Of Non-Interest Income (Schedule Of Disaggregation Of Insurance Service And Other Fees) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	$ 2,567	$ 2,657	$ 4,866	$ 5,159
Commercial Property And Casualty Insurance Commissions [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	1,031	1,025	1,819	1,822
Personal Property And Casualty Insurance Commissions [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	930	921	1,653	1,661
Employee Benefits Sales Commissions [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	209	217	443	461
Profit Sharing And Contingent Revenue [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	191	217	561	619
Wealth Management And Other Financial Services [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	179	167	320	347
Insurance Claims Services Revenue [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees		78		159
Other Insurance-Related Revenue [Member]
Disaggregation of Revenue [Line Items]
Total insurance service and other fees	$ 27	$ 32	$ 70	$ 90