Loan Quality and Allowance for Loan Losses (Aging Of Payments Of The Loan Portfolio) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 938,825	$ 938,928
Loans Past Due and Still Accruing	1,230	2,097
Non-accrual loans	2,598	2,675
Total Loans	942,653	943,700
30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	900	1,179
60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	241	918
90 Days+ Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	89
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	203,869	207,449
Loans Past Due and Still Accruing	567	1,188
Non-accrual loans	107	168
Total Loans	204,543	208,805
Residential Real Estate [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	483	624
Residential Real Estate [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	84	564
Residential Real Estate [Member] | First Liens [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	155,126	157,247
Loans Past Due and Still Accruing	454	1,019
Non-accrual loans	107	168
Total Loans	155,687	158,434
Residential Real Estate [Member] | First Liens [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	398	485
Residential Real Estate [Member] | First Liens [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	56	534
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	48,743	50,202
Loans Past Due and Still Accruing	113	169
Total Loans	48,856	50,371
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	85	139
Residential Real Estate [Member] | Junior Liens & Lines Of Credit [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	28	30
Residential Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	11,025	9,435
Non-accrual loans	466	466
Total Loans	11,491	9,901
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	431,542	425,806
Loans Past Due and Still Accruing	437	768
Non-accrual loans	1,842	1,854
Total Loans	433,821	428,428
Commercial Real Estate [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	348	421
Commercial Real Estate [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing		347
Commercial Real Estate [Member] | 90 Days+ Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	89
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	287,289	291,221
Loans Past Due and Still Accruing	208	111
Non-accrual loans	183	187
Total Loans	287,680	291,519
Commercial [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	54	111
Commercial [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	154
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	5,100	5,017
Loans Past Due and Still Accruing	18	30
Total Loans	5,118	5,047
Consumer [Member] | 30 - 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	15	23
Consumer [Member] | 60 - 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans Past Due and Still Accruing	$ 3	$ 7