Loans And Related Allowances For Loan Losses (Classes of the Loan Portfolio Summarized by the Aggregate Risk Rating) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 892,518	$ 891,926
Commercial real estate- non owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	139,568	157,158
Commercial real estate- all other CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	143,594	140,801
Acquisition and development- 1-4 family residential construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	17,719	15,845
Acquisition and development- All other A&D [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	92,811	88,437
Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	76,723	72,346
Residential mortgage- term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	324,385	316,465
Residential mortgage- home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	74,263	76,951
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	23,455	23,923
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	858,600	844,732
Pass [Member] | Commercial real estate- non owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	133,725	137,181
Pass [Member] | Commercial real estate- all other CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	132,003	125,720
Pass [Member] | Acquisition and development- 1-4 family residential construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	17,719	15,845
Pass [Member] | Acquisition and development- All other A&D [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	84,345	87,135
Pass [Member] | Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	75,299	70,613
Pass [Member] | Residential mortgage- term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	319,059	308,734
Pass [Member] | Residential mortgage- home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	73,059	75,710
Pass [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	23,391	23,794
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	11,427	14,512
Special Mention [Member] | Commercial real estate- non owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	10,620
Special Mention [Member] | Commercial real estate- all other CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,963	3,121
Special Mention [Member] | Acquisition and development- 1-4 family residential construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Special Mention [Member] | Acquisition and development- All other A&D [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,294	65
Special Mention [Member] | Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	17	593
Special Mention [Member] | Residential mortgage- term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	113
Special Mention [Member] | Residential mortgage- home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	148	0
Special Mention [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5	0
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	22,491	32,682
Substandard [Member] | Commercial real estate- non owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,843	9,357
Substandard [Member] | Commercial real estate- all other CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,628	11,960
Substandard [Member] | Acquisition and development- 1-4 family residential construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Substandard [Member] | Acquisition and development- All other A&D [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,172	1,237
Substandard [Member] | Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,407	1,140
Substandard [Member] | Residential mortgage- term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,326	7,618
Substandard [Member] | Residential mortgage- home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,056	1,241
Substandard [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 59	$ 129