Allowance For Loan Losses (Summary Of Allowance For Loan Losses By Loan Segment And Class) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 16,689	$ 14,992
Charge-offs	(48)	0
Recoveries	25	62
Provision	200	650
Ending Balance	16,866	15,704
Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	14,118	12,774
Charge-offs	0	0
Recoveries	22	53
Provision	(446)	901
Ending Balance	13,694	13,728
Total Consumer Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	391	457
Charge-offs	(48)	0
Recoveries	3	9
Provision	124	(120)
Ending Balance	470	346
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,180	1,761
Charge-offs	0	0
Recoveries	0	0
Provision	522	(131)
Ending Balance	2,702	1,630
Builder & Developer [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,388	2,384
Charge-offs	0	0
Recoveries	18	0
Provision	(429)	274
Ending Balance	2,977	2,658
Commercial Real Estate Investor [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,013	2,870
Charge-offs	0	0
Recoveries	0	0
Provision	(225)	137
Ending Balance	2,788	3,007
Residential Real Estate Investor [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,505	2,517
Charge-offs	0	0
Recoveries	3	53
Provision	31	(61)
Ending Balance	2,539	2,509
Hotel/Motel [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	637	807
Charge-offs	0	0
Recoveries	0	0
Provision	122	(60)
Ending Balance	759	747
Wholesale & Retail [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	909	803
Charge-offs	0	0
Recoveries	1	0
Provision	15	26
Ending Balance	925	829
Manufacturing [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	592	307
Charge-offs	0	0
Recoveries	0	0
Provision	(50)	482
Ending Balance	542	789
Agriculture [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	431	619
Charge-offs	0	0
Recoveries	0	0
Provision	18	44
Ending Balance	449	663
Residential Mortgages [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	108	85
Charge-offs	0	0
Recoveries	0	5
Provision	6	(2)
Ending Balance	114	88
Home Equity [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	217	179
Charge-offs	0	0
Recoveries	0	0
Provision	(13)	3
Ending Balance	204	182
Other [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,643	2,467
Charge-offs	0	0
Recoveries	0	0
Provision	72	59
Ending Balance	2,715	2,526
Other [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	66	193
Charge-offs	(48)	0
Recoveries	3	4
Provision	131	(121)
Ending Balance	$ 152	$ 76