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Loans and Related Allowance for Loan Losses (Classes of the Loan Portfolio Summarized by the Aggregate Risk Rating) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 937,493	$ 892,518
Commercial real estate- non owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	145,576	139,568
Commercial real estate- all other CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	151,220	143,594
Acquisition and development- 1-4 family residential construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	17,531	17,719
Acquisition and development- All other A&D [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	89,764	92,811
Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	81,647	76,723
Residential mortgage- term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	344,572	324,385
Residential mortgage- home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	73,873	74,263
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	33,310	23,455
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	906,959	858,600
Pass [Member] | Commercial real estate- non owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	141,575	133,725
Pass [Member] | Commercial real estate- all other CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	140,024	132,003
Pass [Member] | Acquisition and development- 1-4 family residential construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	17,531	17,719
Pass [Member] | Acquisition and development- All other A&D [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	81,825	84,345
Pass [Member] | Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	80,594	75,299
Pass [Member] | Residential mortgage- term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	339,614	319,059
Pass [Member] | Residential mortgage- home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	72,581	73,059
Pass [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	33,215	23,391
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	12,040	11,427
Special Mention [Member] | Commercial real estate- non owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Special Mention [Member] | Commercial real estate- all other CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,510	3,963
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	7,378	7,294
Special Mention [Member] | Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	17
Special Mention [Member] | Residential mortgage- term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Special Mention [Member] | Residential mortgage- home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	147	148
Special Mention [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5	5
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	18,494	22,491
Substandard [Member] | Commercial real estate- non owner-occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,001	5,843
Substandard [Member] | Commercial real estate- all other CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,686	7,628
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	561	1,172
Substandard [Member] | Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,053	1,407
Substandard [Member] | Residential mortgage- term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,958	5,326
Substandard [Member] | Residential mortgage- home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,145	1,056
Substandard [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 90	$ 59

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No definition available.

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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