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Loans - Portfolio (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 1,476,761 | $ 1,297,075 | $ 1,238,283
Percentage of loans receivable | 100.00% | 100.00% |
Commercial | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 442,121 | $ 372,810 | 353,243
Percentage of loans receivable | 29.90% | 28.70% |
Commercial | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 56,565 | $ 38,084 | 27,304
Percentage of loans receivable | 3.80% | 3.00% |
Commercial | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 285,015 | $ 218,773 | 196,391
Percentage of loans receivable | 19.30% | 16.90% |
Municipal |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 43,783 | $ 41,288 | 51,128
Percentage of loans receivable | 3.00% | 3.20% |
Residential | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 21,600 | $ 14,813 | 17,743
Percentage of loans receivable | 1.50% | 1.20% |
Residential | Term |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 522,070 | $ 492,455 | 469,145
Percentage of loans receivable | 35.30% | 37.90% |
Home equity line of credit |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 79,750 | $ 92,349 | 98,469
Percentage of loans receivable | 5.40% | 7.10% |
Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 25,857 | $ 26,503 | $ 24,860
Percentage of loans receivable | 1.80% | 2.00% |

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