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Borrowings (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017
Debt Instrument [Line Items] |  |  |
Long-term debt outstanding | $ 84,725 | $ 94,600 | $ 96,850
FHLB Advances |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt outstanding | $ 74,216 | 85,000 |
Weighted average rate percentage | 2.35% |  |
Trust preferred subordinated debt |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt outstanding | $ 5,000 | 5,000 |
Interest rate percentage | 6.39% |  |
Trust preferred subordinated debt issued | $ 5,000 |  |
Loan payable to local bank, 4.5% | Loan payable to local bank |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt outstanding | $ 4,509 | 4,600 |
Interest rate percentage | 4.50% |  |
Period of fixed interest rate | 5 years |  |
Loan payable to local bank, 5.25% | Loan payable to local bank |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt outstanding | $ 1,000 | $ 0 |
Loan payable to local bank, 5.25% | Loan payable to local bank | Wall Street Journal Prime Rate |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate percentage | 5.30% |  |

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