Borrowed Funds (Summary Of Short-Term Borrowings) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Beginning Balance	$ 202,429		$ 250,499	[1]
Short-term FHLB Advances [Member]
Debt Instrument [Line Items]
Beginning Balance	199,900	$ 202,250	247,000
Average balance outstanding for the period	211,884	194,071	201,712
Maximum balance outstanding at any month end during period	$ 262,000	$ 229,300	$ 247,000
Weighted average interest rate for the period	1.87%	0.98%	1.19%
Weighted average interest rate for balances outstanding	2.19%	1.30%	1.60%
Federal Funds Purchased and Lines of Credit [Member]
Debt Instrument [Line Items]
Beginning Balance	$ 2,529	$ 3,478	$ 3,499
Average balance outstanding for the period	3,497	3,469	3,512
Maximum balance outstanding at any month end during period	$ 3,523	$ 3,478	$ 3,499
Weighted average interest rate for the period	1.65%	0.91%	1.10%
Weighted average interest rate for balances outstanding	2.00%	1.25%	1.50%
Repurchase Agreements [Member]
Debt Instrument [Line Items]
Beginning Balance			$ 0
Average balance outstanding for the period			519
Maximum balance outstanding at any month end during period			$ 0
Weighted average interest rate for the period			0.12%
Weighted average interest rate for balances outstanding			0.00%

[1] Derived from audited consolidated financial statements