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Loans, net and allowance for credit losses - Changes in Allowance for Loan Losses Account by Major Classification of Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Allowance for loan losses: |  |  |  |
Beginning Balance | $ 23,218 | $ 29,374 | $ 27,472 | $ 28,383
Charge-offs | (65) | (101) | (217) | (554)
Recoveries | 23 | 99 | 141 | 293
Provisions (credits) | (166) | 450 | (1,103) | 1,700
Ending balance | 23,010 | 29,822 | 23,010 | 29,822
Cumulative impact of adoption | ASU 2016-13 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | (3,283) |
Adjusted Balance |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 24,189 |
Commercial |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 2,751 | 6,522 | 4,365 | 7,466
Charge-offs |  |  | (4) | (161)
Recoveries | 4 | 10 | 9 | 39
Provisions (credits) | (504) | (12) | (436) | (824)
Ending balance | 2,251 | 6,520 | 2,251 | 6,520
Commercial | Cumulative impact of adoption | ASU 2016-13 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | (1,683) |
Commercial | Adjusted Balance |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 2,682 |
Municipal |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 827 | 1,244 | 1,247 | 987
Provisions (credits) | 40 | 7 | (1,127) | 264
Ending balance | 867 | 1,251 | 867 | 1,251
Municipal | Cumulative impact of adoption | ASU 2016-13 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 747 |
Municipal | Adjusted Balance |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 1,994 |
Commercial real estate |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 14,961 | 17,569 | 17,915 | 15,928
Charge-offs |  | (15) |  | (147)
Recoveries |  | 32 | 1 | 109
Provisions (credits) | 134 | 437 | 523 | 2,133
Ending balance | 15,095 | 18,023 | 15,095 | 18,023
Commercial real estate | Cumulative impact of adoption | ASU 2016-13 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | (3,344) |
Commercial real estate | Adjusted Balance |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 14,571 |
Residential real estate |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 3,767 | 3,220 | 3,072 | 3,209
Charge-offs |  |  |  | (2)
Recoveries | 3 | 1 | 22 | 4
Provisions (credits) | (128) | 9 | (163) | 19
Ending balance | 3,898 | 3,230 | 3,898 | 3,230
Residential real estate | Cumulative impact of adoption | ASU 2016-13 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 967 |
Residential real estate | Adjusted Balance |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 4,039 |
Consumer |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance | 912 | 819 | 873 | 793
Charge-offs | (65) | (86) | (213) | (244)
Recoveries | 16 | 56 | 109 | 141
Provisions (credits) | 36 | 9 | 100 | 108
Ending balance | $ 899 | $ 798 | 899 | $ 798
Consumer | Cumulative impact of adoption | ASU 2016-13 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 30 |
Consumer | Adjusted Balance |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | $ 903 |

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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- Definition Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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