Borrowed Funds (Summary Of Short-Term Borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Balance at December 31	$ 224,461	$ 171,394
Short-term FHLB Advances [Member]
Debt Instrument [Line Items]
Balance at December 31	221,000	167,950
Average balance outstanding for the period	187,420	146,412
Maximum balance outstanding at any month end during period	$ 231,200	$ 171,160
Weighted average interest rate for the period	0.79%	0.43%
Weighted average interest rate for balances outstanding	0.60%	0.35%
Federal Funds Purchased and Lines of Credit [Member]
Debt Instrument [Line Items]
Balance at December 31	$ 3,461	$ 3,444
Average balance outstanding for the period	3,456	4,690
Maximum balance outstanding at any month end during period	$ 3,462	$ 7,438
Weighted average interest rate for the period	0.75%	0.50%
Weighted average interest rate for balances outstanding	0.51%	0.26%