Borrowed Funds (Summary Of Short-Term Borrowings) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Debt Instrument [Line Items]
Beginning Balance	$ 206,694		$ 309,084	[1]
Short-term FHLB Advances [Member]
Debt Instrument [Line Items]
Beginning Balance	206,550	$ 233,300	303,950
Average balance outstanding for the period	196,058	209,877	223,764
Maximum balance outstanding at any month end during period	$ 225,200	$ 262,000	$ 303,950
Weighted average interest rate for the period	2.63%	2.01%	2.18%
Weighted average interest rate for balances outstanding	2.15%	2.41%	2.71%
Federal Funds Purchased and Lines of Credit [Member]
Debt Instrument [Line Items]
Beginning Balance	$ 144	$ 5,103	$ 5,134
Average balance outstanding for the period	564	4,128	4,378
Maximum balance outstanding at any month end during period	$ 144	$ 7,534	$ 7,534
Weighted average interest rate for the period	2.48%	1.80%	1.95%
Weighted average interest rate for balances outstanding	2.00%	2.25%	2.50%

[1] Derived from audited consolidated financial statements