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Loans Receivable and Allowance for Loan Losses (Loan Portfolio Summarized by the Past Due Status) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 760,414 | $ 710,261
Non-Accrual | 1,983 | 1,926
Total Past Due and Non-Accrual | 3,921 | 3,844
Total Loans | 764,335 | 714,105
Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 1,310 | 1,613
Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 132 | 304
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 496 | 1
Residential Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 233,291 | 234,790
Non-Accrual | 1,706 | 1,136
Total Past Due and Non-Accrual | 2,468 | 2,387
Total Loans | 235,759 | 237,177
Residential Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 594 | 986
Residential Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 81 | 264
Residential Real Estate Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 87 | 1
Commercial Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 341,602 | 318,979
Non-Accrual | 277 | 762
Total Past Due and Non-Accrual | 1,332 | 1,208
Total Loans | 342,934 | 320,187
Commercial Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 646 | 445
Commercial Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 1
Commercial Real Estate Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 409 | 0
Construction Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 17,228 | 19,681
Non-Accrual | 0 | 28
Total Past Due and Non-Accrual |  | 28
Total Loans | 17,228 | 19,709
Construction Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due |  | 0
Construction Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Construction Real Estate Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Commercial, Financial And Agricultural [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 97,424 | 85,355
Non-Accrual | 0 | 0
Total Past Due and Non-Accrual | 37 | 153
Total Loans | 97,461 | 85,508
Commercial, Financial And Agricultural [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 10 | 143
Commercial, Financial And Agricultural [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 27 | 10
Commercial, Financial And Agricultural [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Consumer Loans To Individuals [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 70,869 | 51,456
Non-Accrual | 0 | 0
Total Past Due and Non-Accrual | 84 | 68
Total Loans | 70,953 | 51,524
Consumer Loans To Individuals [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 60 | 39
Consumer Loans To Individuals [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 24 | 29
Consumer Loans To Individuals [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | $ 0 | $ 0

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