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Loans Receivable and Allowance for Loan Losses (Classes of the Loan Portfolio Summarized by the Aggregate Risk Rating) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Total Summarized by Aggregate Risk Rating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	$ 437,939	$ 405,695
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	424,390	395,032
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	9,562	6,317
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	3,987	4,346
Doubtful or Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	0	0
Total Summarized by Performance of Individual Credits [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	318,328	308,410
Performing Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	316,824	307,034
Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	1,504	1,165
Commercial Real Estate Loans [Member] | Total Summarized by Aggregate Risk Rating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	344,960	320,187
Commercial Real Estate Loans [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	331,511	310,432
Commercial Real Estate Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	9,542	5,432
Commercial Real Estate Loans [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	3,907	4,323
Commercial Real Estate Loans [Member] | Doubtful or Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	0	0
Commercial, Financial And Agricultural [Member] | Total Summarized by Aggregate Risk Rating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	92,979	85,508
Commercial, Financial And Agricultural [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	92,879	84,600
Commercial, Financial And Agricultural [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	20	885
Commercial, Financial And Agricultural [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	80	23
Commercial, Financial And Agricultural [Member] | Doubtful or Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	0	0
Residential Real Estate Loans [Member] | Total Summarized by Performance of Individual Credits [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	235,508	237,177
Residential Real Estate Loans [Member] | Performing Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	234,004	235,829
Residential Real Estate Loans [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	1,504	1,137
Construction Real Estate Loans [Member] | Total Summarized by Performance of Individual Credits [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	15,328	19,709
Construction Real Estate Loans [Member] | Performing Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	15,328	19,681
Construction Real Estate Loans [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	0	28
Consumer Loans To Individuals [Member] | Total Summarized by Performance of Individual Credits [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	67,492	51,524
Consumer Loans To Individuals [Member] | Performing Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	67,492	51,524
Consumer Loans To Individuals [Member] | Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Amount	$ 0	$ 0

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+ References

No definition available.

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- Definition

Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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