Loans (Summary Of Past Due Loans, Nonaccrual Loans And Current Loans By Loan Segment And Class) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 12,934	$ 5,052
Total Past Due and Nonaccrual	20,097	7,434
Current	1,473,930	1,392,330
Total Loans	1,494,027	1,399,764	$ 1,402,262
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,436	1,944
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,434	362
Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	293	76
Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	11,741	4,212
Total Past Due and Nonaccrual	17,941	5,657
Current	1,272,579	1,192,173
Total Loans	1,290,520	1,197,830	1,201,206
Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,749	1,165
Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,233	280
Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	218	0
Total Consumer Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,193	840
Total Past Due and Nonaccrual	2,156	1,777
Current	201,351	200,157
Total Loans	203,507	201,934	201,056
Total Consumer Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	687	779
Total Consumer Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	201	82
Total Consumer Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	75	76
Builder & Developer [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	2,092
Total Past Due and Nonaccrual	891	2,733
Current	161,711	181,669
Total Loans	162,602	184,402	196,611
Builder & Developer [Member] | Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	550	615
Builder & Developer [Member] | Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	223	26
Builder & Developer [Member] | Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	118	0
Commercial Real Estate Investor [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	601	1,306
Total Past Due and Nonaccrual	2,429	1,306
Current	216,995	229,521
Total Loans	219,424	230,827	245,997
Commercial Real Estate Investor [Member] | Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,828	0
Commercial Real Estate Investor [Member] | Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate Investor [Member] | Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Residential Real Estate Investor [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,005	499
Total Past Due and Nonaccrual	3,845	846
Current	231,281	208,568
Total Loans	235,126	209,414	211,448
Residential Real Estate Investor [Member] | Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,910	347
Residential Real Estate Investor [Member] | Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	930	0
Residential Real Estate Investor [Member] | Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Hotel/Motel [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Total Past Due and Nonaccrual	0	0
Current	86,815	63,195
Total Loans	86,815	63,195	66,291
Hotel/Motel [Member] | Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Hotel/Motel [Member] | Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Hotel/Motel [Member] | Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Wholesale & Retail [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	7,817	0
Total Past Due and Nonaccrual	7,817	0
Current	98,132	103,040
Total Loans	105,949	103,040	98,373
Wholesale & Retail [Member] | Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Wholesale & Retail [Member] | Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Wholesale & Retail [Member] | Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Manufacturing [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,869	0
Total Past Due and Nonaccrual	1,869	0
Current	82,572	62,510
Total Loans	84,441	62,510	58,961
Manufacturing [Member] | Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Manufacturing [Member] | Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Manufacturing [Member] | Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Agriculture [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	287	315
Total Past Due and Nonaccrual	304	452
Current	65,216	59,479
Total Loans	65,520	59,931	57,927
Agriculture [Member] | Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Agriculture [Member] | Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	17	137
Agriculture [Member] | Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Residential Mortgages [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	467	162
Total Past Due and Nonaccrual	909	693
Current	81,854	78,632
Total Loans	82,763	79,325	79,988
Residential Mortgages [Member] | Total Consumer Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	364	392
Residential Mortgages [Member] | Total Consumer Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11	72
Residential Mortgages [Member] | Total Consumer Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	67	67
Home Equity [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	493	452
Total Past Due and Nonaccrual	812	721
Current	96,489	97,229
Total Loans	97,301	97,950	95,483
Home Equity [Member] | Total Consumer Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	207	264
Home Equity [Member] | Total Consumer Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	112	5
Home Equity [Member] | Total Consumer Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Other [Member] | Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	162	0
Total Past Due and Nonaccrual	786	320
Current	329,857	284,191
Total Loans	330,643	284,511	265,598
Other [Member] | Total Commercial Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	461	203
Other [Member] | Total Commercial Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	63	117
Other [Member] | Total Commercial Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	100	0
Other [Member] | Total Consumer Related Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	233	226
Total Past Due and Nonaccrual	435	363
Current	23,008	24,296
Total Loans	23,443	24,659	$ 25,585
Other [Member] | Total Consumer Related Loans [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	116	123
Other [Member] | Total Consumer Related Loans [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	78	5
Other [Member] | Total Consumer Related Loans [Member] | Greater Than Or Equal To 90 Days Past Due And Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 8	$ 9