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Allowance for Credit Losses - Loans - Loan portfolio and allowance for credit losses (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | --- | ---
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment | $ 4,730 |  |  | $ 3,575 |  |  |
Collectively evaluated for impairment | 997,576 |  |  | 987,191 |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 1,002,306 |  |  | 990,766 |  |  |
Total loans |  |  |  | 990,766 |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation | 435 |  |  | 523 |  |  |
General reserve allocation | 11,878 |  |  | 10,220 |  |  |
Total allowance for loan losses | 12,313 | $ 12,221 | $ 11,947 | 10,743 | $ 10,672 | $ 11,568 | $ 12,398
Other commercial and industrial |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment | 1,937 |  |  |  |  |  |
Collectively evaluated for impairment | 142,869 |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 144,806 |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation | 434 |  |  |  |  |  |
General reserve allocation | 2,310 |  |  |  |  |  |
Total allowance for loan losses | 2,744 | 2,849 | 2,908 |  |  |  |
Other commercial real estate (non-owner occupied) |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment | 2,602 |  |  |  |  |  |
Collectively evaluated for impairment | 227,283 |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 229,885 |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation | 1 |  |  |  |  |  |
General reserve allocation | 3,182 |  |  |  |  |  |
Total allowance for loan losses | 3,183 | 3,087 | 3,196 | 5,972 |  |  |
Residential mortgage |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  |
Collectively evaluated for impairment | 174,419 |  |  | 297,971 |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 174,419 |  |  |  |  |  |
Total loans |  |  |  | 297,971 |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation | 0 |  |  | 0 |  |  |
General reserve allocation | 1,027 |  |  | 1,380 |  |  |
Total allowance for loan losses | 1,027 | 1,037 | 1,025 | 1,380 | 1,377 | 1,473 | 1,590
Allocation for general risk |  |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation |  |  |  | 0 |  |  |
General reserve allocation |  |  |  | 653 |  |  |
Total allowance for loan losses |  |  |  | 653 | 1,020 | 1,119 | 1,232
Commercial |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 726,383 |  |  |  |  |  |
Total loans |  |  |  | 679,322 |  |  |
Commercial | Commercial. |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 1,989 |  |  |
Collectively evaluated for impairment |  |  |  | 226,589 |  |  |
Total loans |  |  |  | 228,578 |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation |  |  |  | 520 |  |  |
General reserve allocation |  |  |  | 2,133 |  |  |
Total allowance for loan losses |  |  |  | 2,653 | 2,756 | 3,158 | 3,071
Commercial | Commercial real estate (owner occupied) |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment | 191 |  |  |  |  |  |
Collectively evaluated for impairment | 88,267 |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 88,458 |  |  |  |  |  |
Total loans |  |  |  | 75,158 |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation | 0 |  |  |  |  |  |
General reserve allocation | 1,544 |  |  |  |  |  |
Total allowance for loan losses | 1,544 | 1,517 | 1,380 |  |  |  |
Commercial | Other commercial and industrial |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 144,806 |  |  |  |  |  |
Commercial | Commercial real estate (non-owner occupied) |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 1,586 |  |  |
Collectively evaluated for impairment |  |  |  | 449,158 |  |  |
Total loans |  |  |  | 450,744 |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation |  |  |  | 3 |  |  |
General reserve allocation |  |  |  | 5,969 |  |  |
Total allowance for loan losses |  |  |  | 5,972 | 5,432 | 5,716 | 6,392
Commercial | Commercial real estate (non-owner occupied) - retail |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment | 0 |  |  |  |  |  |
Collectively evaluated for impairment | 158,637 |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 158,637 |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation | 0 |  |  |  |  |  |
General reserve allocation | 1,526 |  |  |  |  |  |
Total allowance for loan losses | 1,526 | 1,477 | 1,432 |  |  |  |
Commercial | Commercial real estate (non-owner occupied) - multi-family |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment | 0 |  |  |  |  |  |
Collectively evaluated for impairment | 104,597 |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 104,597 |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation | 0 |  |  |  |  |  |
General reserve allocation | 1,175 |  |  |  |  |  |
Total allowance for loan losses | 1,175 | 1,145 | 1,226 |  |  |  |
Commercial | Other commercial real estate (non-owner occupied) |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 229,885 |  |  |  |  |  |
Consumer. |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 275,923 |  |  |  |  |  |
Total loans |  |  |  | 311,444 |  |  |
Consumer. | Residential mortgage |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 174,419 |  |  |  |  |  |
Total loans |  |  |  | 297,971 |  |  |
Consumer. | Consumer |  |  |  |  |  |  |
Loans: |  |  |  |  |  |  |
Individually evaluated for impairment |  |  |  | 0 |  |  |
Collectively evaluated for impairment | 101,504 |  |  | 13,473 |  |  |
Loans (net of unearned income $401 on September 30, 2023 and $343 on December 31, 2022) | 101,504 |  |  |  |  |  |
Total loans |  |  |  | 13,473 |  |  |
Allowance for loan losses: |  |  |  |  |  |  |
Specific reserve allocation | 0 |  |  | 0 |  |  |
General reserve allocation | 1,114 |  |  | 85 |  |  |
Total allowance for loan losses | $ 1,114 | $ 1,109 | $ 780 | $ 85 | $ 87 | $ 102 | $ 113

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