Borrowed Funds (Summary Of Short-Term Borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Balance at December 31	$ 140,146	$ 199,345
Short-term FHLB Advances [Member]
Debt Instrument [Line Items]
Balance at December 31	140,000	199,200
Average balance outstanding for the period	130,241	193,992
Maximum balance outstanding at any month end during period	$ 215,700	$ 237,400
Weighted average interest rate for the period	0.67%	2.48%
Weighted average interest rate for balances outstanding	0.35%	1.83%
Federal Funds Purchased and Lines of Credit [Member]
Debt Instrument [Line Items]
Balance at December 31	$ 146	$ 145
Average balance outstanding for the period	170	458
Maximum balance outstanding at any month end during period	$ 146	$ 145
Weighted average interest rate for the period	0.50%	2.43%
Weighted average interest rate for balances outstanding	0.25%	1.75%