Borrowed Funds (Summary Of Short-Term Borrowings) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	[1]
Debt Instrument [Line Items]
Beginning Balance	$ 202,988	$ 234,657	$ 224,461
Short-term FHLB Advances [Member]
Debt Instrument [Line Items]
Beginning Balance	199,500	231,200
Average balance outstanding for the period	196,728	177,239
Maximum balance outstanding at any month end during period	$ 229,300	$ 231,200
Weighted average interest rate for the period	1.10%	0.59%
Weighted average interest rate for balances outstanding	1.32%	0.54%
Federal Funds Purchased and Lines of Credit [Member]
Debt Instrument [Line Items]
Beginning Balance	$ 3,488	$ 3,457
Average balance outstanding for the period	3,474	3,455
Maximum balance outstanding at any month end during period	$ 3,488	$ 3,457
Weighted average interest rate for the period	1.03%	0.50%
Weighted average interest rate for balances outstanding	1.25%	0.50%

[1] Derived from audited consolidated financial statements