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Loans - (Details Textual) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) loan | Sep. 30, 2019 USD ($) loan | Sep. 30, 2020 USD ($) loan | Sep. 30, 2019 USD ($) loan | Dec. 31, 2019 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan originations | $ 1,101,606,000 |  | $ 1,101,606,000 |  | $ 968,814,000
Outstanding balance of high risk loans, minimum | 250,000 |  | 250,000 |  |
Interest income on impaired loans | 104,000 | $ 274,000 | 154,000 | $ 477,000 |
Unfunded commitments to lend | $ 0 |  | $ 0 |  |
Loan contracts restructured | 3 |  | 3 |  |
Number of loans that subsequently defaulted | loan | 0 | 0 | 0 | 0 |
Loans | $ 1,101,606,000 |  | $ 1,101,606,000 |  | 968,814,000
Commercial Real Estate Portfolio Segment |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan originations | 638,283,000 |  | $ 638,283,000 |  | 636,336,000
Loan contracts restructured |  |  | 2 |  |
Troubled debt restructuring | 131,000 |  | $ 131,000 |  |
Loans | 638,283,000 |  | 638,283,000 |  | 636,336,000
Legacy Loans |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan originations | 1,005,172,000 |  | 1,005,172,000 |  | 847,100,000
Loans | 1,005,172,000 |  | 1,005,172,000 |  | 847,100,000
Legacy Loans | Commercial Real Estate Portfolio Segment |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan originations | 574,262,000 |  | 574,262,000 |  | 564,979,000
Loans | 574,262,000 |  | 574,262,000 |  | 564,979,000
Other commercial real estate |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan originations | 509,992,000 |  | 509,992,000 |  | 540,239,000
Loans | 509,992,000 |  | 509,992,000 |  | 540,239,000
Other commercial real estate | Commercial Real Estate Portfolio Segment |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan originations | 509,992,000 |  | 509,992,000 |  | 540,239,000
Loans | 509,992,000 |  | 509,992,000 |  | 540,239,000
Other commercial real estate | Legacy Loans | Commercial Real Estate Portfolio Segment |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan originations | 464,100,000 |  | 464,100,000 |  | 481,943,000
Loans | 464,100,000 |  | $ 464,100,000 |  | $ 481,943,000
Commercial Loan |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan contracts restructured |  |  | 1 |  |
Troubled debt restructuring | 97,000 |  | $ 97,000 |  |
Loan Modifications, CARES Act |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loan originations | 12,600,000 |  | 12,600,000 |  |
Loans | $ 12,600,000 |  | $ 12,600,000 |  |

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