Borrowed Funds (Summary Of Short-Term Borrowings) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Beginning Balance	$ 90,945		$ 199,345	[1]
Short-term FHLB Advances [Member]
Debt Instrument [Line Items]
Beginning Balance	90,800	$ 225,200	199,200
Average balance outstanding for the period	107,530	192,895	193,992
Maximum balance outstanding at any month end during period	$ 161,600	$ 225,200	$ 237,400
Weighted average interest rate for the period	1.10%	2.72%	2.48%
Weighted average interest rate for balances outstanding	0.39%	2.51%	1.83%
Federal Funds Purchased and Lines of Credit [Member]
Debt Instrument [Line Items]
Beginning Balance	$ 145	$ 143	$ 145
Average balance outstanding for the period	145	777	458
Maximum balance outstanding at any month end during period	$ 145	$ 143	$ 145
Weighted average interest rate for the period	0.83%	2.48%	2.43%
Weighted average interest rate for balances outstanding	0.25%	2.50%	1.75%

[1] Derived from audited consolidated financial statements