Borrowed Funds (Summary Of Short-Term Borrowings) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Beginning Balance	$ 234,657	$ 145,291	$ 171,394	[1]
Short-term FHLB Advances [Member]
Debt Instrument [Line Items]
Beginning Balance	231,200	141,850	167,950
Average balance outstanding for the period	177,239	144,073	146,412
Maximum balance outstanding at any month end during period	$ 231,200	$ 171,160	$ 171,160
Weighted average interest rate for the period	0.54%	0.42%	0.43%
Weighted average interest rate for balances outstanding	0.59%	0.33%	0.35%
Federal Funds Purchased and Lines of Credit [Member]
Debt Instrument [Line Items]
Beginning Balance	$ 3,457	$ 3,441	$ 3,444
Average balance outstanding for the period	3,455	5,104	4,690
Maximum balance outstanding at any month end during period	$ 3,457	$ 7,438	$ 7,438
Weighted average interest rate for the period	0.50%	0.25%	0.50%
Weighted average interest rate for balances outstanding	0.50%	0.25%	0.26%

[1] December 31, 2015 financial information has been extracted from audited consolidated financial statements