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Loans and Allowance for Loan Losses (Details 2) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | $ 5,860 | $ 5,105 | $ 4,354
All Other Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 5,844 | 5,105 |
All Other Loans [Member] | Performing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 5,399 | 5,101 |
All Other Loans [Member] | Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 445 | 4 |
Purchased Credit Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 16 | 0 |
Commercial Real Estate [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 2,465 | 2,369 | 1,906
Commercial Real Estate [Member] | All Other Loans [Member] | Performing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 2,444 | 2,369 |
Commercial Real Estate [Member] | All Other Loans [Member] | Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 5 | 0 |
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 16 | 0 |
Consumer Real Estate [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 1,596 | 1,382 | 1,015
Consumer Real Estate [Member] | All Other Loans [Member] | Performing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 1,340 | 1,382 |
Consumer Real Estate [Member] | All Other Loans [Member] | Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 256 | 0 |
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 0 | 0 |
Construction and Land Development [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 521 | 717 | 627
Construction and Land Development [Member] | All Other Loans [Member] | Performing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 521 | 717 |
Construction and Land Development [Member] | All Other Loans [Member] | Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 0 | 0 |
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 0 | 0 |
Commercial and Industrial [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 1,062 | 520 | 777
Commercial and Industrial [Member] | All Other Loans [Member] | Performing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 890 | 516 |
Commercial and Industrial [Member] | All Other Loans [Member] | Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 172 | 4 |
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 0 | 0 |
Consumer and Other [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 216 | 117 | $ 29
Consumer and Other [Member] | All Other Loans [Member] | Performing [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 204 | 117 |
Consumer and Other [Member] | All Other Loans [Member] | Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | 12 | 0 |
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Allowance for loan losses | $ 0 | $ 0 |

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