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Loans Receivable and Allowance for Loan Losses (Loan Portfolio Summarized by the Past Due Status) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | $ 772,750 | $ 760,414
Non-Accrual | 1,680 | 1,983
Total Past Due and Non-Accrual | 3,163 | 3,921
Total Loans | 775,913 | 764,335
Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 1,339 | 1,310
Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 144 | 132
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 496
Residential Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 230,742 | 233,291
Non-Accrual | 1,408 | 1,706
Total Past Due and Non-Accrual | 2,029 | 2,468
Total Loans | 232,771 | 235,759
Residential Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 516 | 594
Residential Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 105 | 81
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 | 0 | 87
Commercial Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 347,526 | 341,602
Non-Accrual | 272 | 277
Total Past Due and Non-Accrual | 981 | 1,332
Total Loans | 348,507 | 342,934
Commercial Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 685 | 646
Commercial Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 24 | 0
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 | 0 | 409
Construction Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Current | 17,831 | 17,228
Non-Accrual | 0 | 0
Total Past Due and Non-Accrual | 0 | 0
Total Loans | 17,831 | 17,228
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 | 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 | 100,786 | 97,424
Non-Accrual | 0 | 0
Total Past Due and Non-Accrual | 54 | 37
Total Loans | 100,840 | 97,461
Commercial, Financial And Agricultural [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 54 | 10
Commercial, Financial And Agricultural [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 27
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 | 75,865 | 70,869
Non-Accrual | 0 | 0
Total Past Due and Non-Accrual | 99 | 84
Total Loans | 75,964 | 70,953
Consumer Loans To Individuals [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 84 | 60
Consumer Loans To Individuals [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 15 | 24
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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