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Loans - Schedule of Classes of the Loan Portfolio Summarized by the Aggregate Risk Rating (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016 | Jun. 30, 2016
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | $ 969,675 | $ 907,910 | $ 866,832
Pass |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 926,966 | 867,398 |
Special Mention |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 29,465 | 25,306 |
Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 13,244 | 15,206 |
Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 0 | 0 |
Commercial and industrial |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 161,225 | 140,344 | 121,967
Commercial and industrial | Pass |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 154,822 | 134,088 |
Commercial and industrial | Special Mention |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 3,679 | 2,355 |
Commercial and industrial | Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 2,724 | 3,901 |
Commercial and industrial | Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 0 | 0 |
Commercial real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 339,026 | 318,980 | 305,136
Commercial real estate | Pass |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 309,410 | 291,762 |
Commercial real estate | Special Mention |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 20,013 | 17,376 |
Commercial real estate | Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 9,603 | 9,842 |
Commercial real estate | Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 0 | 0 |
Commercial real estate construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 24,327 | 15,271 | 11,104
Commercial real estate construction | Pass |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 23,048 | 13,606 |
Commercial real estate construction | Special Mention |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 1,029 | 1,202 |
Commercial real estate construction | Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 250 | 463 |
Commercial real estate construction | Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 0 | 0 |
Residential mortgage |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 354,734 | 348,539 | 349,947
Residential mortgage | Pass |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 349,809 | 344,048 |
Residential mortgage | Special Mention |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 4,377 | 3,617 |
Residential mortgage | Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 548 | 874 |
Residential mortgage | Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 0 | 0 |
Home equity lines of credit |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 76,040 | 70,072 | 64,177
Home equity lines of credit | Pass |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 75,554 | 69,190 |
Home equity lines of credit | Special Mention |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 367 | 756 |
Home equity lines of credit | Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 119 | 126 |
Home equity lines of credit | Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 0 | 0 |
Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 14,323 | 14,704 | $ 14,501
Consumer | Pass |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 14,323 | 14,704 |
Consumer | Special Mention |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 0 | 0 |
Consumer | Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | 0 | 0 |
Consumer | Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total | $ 0 | $ 0 |

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