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Loans, net and allowance for credit losses - Allocation of Allowance for Loan Losses and Related Loans by Major Classification of Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Allowance for loan losses: |  |  |  |  |
Beginning Balance | $ 22,597 | $ 25,444 | $ 21,895 | $ 27,472 | $ 27,472
Charge-offs | (135) | (77) | (243) | (152) |
Recoveries | 65 | 52 | 167 | 118 |
Provisions (credits) | 596 | (2,201) | 1,304 | (937) |
Ending balance | 23,123 | 23,218 | 23,123 | 23,218 | 21,895
Ending balance: individually evaluated for impairment | 422 |  | 422 |  | 31
Ending balance: collectively evaluated for impairment | 22,701 |  | 22,701 |  | 21,864
Loans receivable: |  |  |  |  |
Loans |  |  | 243 |  | 3,025
Loans | 2,869,553 |  | 2,869,553 |  | 2,849,897
Ending balance: collectively evaluated for impairment | 2,862,702 |  | 2,862,702 |  | 2,845,157
Cumulative impact of adoption | ASC 326 |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance |  |  |  | (3,283) | (3,283)
Ending balance |  |  |  |  |
Real estate |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance: individually evaluated for impairment | 6,844 |  | 6,844 |  | 4,730
Non-real estate |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance: individually evaluated for impairment | 7 |  | 7 |  | 10
Commercial |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance | 2,287 | 2,481 | 2,272 | 4,365 | 4,365
Charge-offs | (41) |  | (46) | (4) |
Recoveries | 25 | 5 | 80 | 5 |
Provisions (credits) | (100) | 265 | (135) | 68 |
Ending balance | 2,171 | 2,751 | 2,171 | 2,751 | 2,272
Ending balance: individually evaluated for impairment | 7 |  | 7 |  | 10
Ending balance: collectively evaluated for impairment | 2,164 |  | 2,164 |  | 2,262
Loans receivable: |  |  |  |  |
Loans |  |  | 46 |  | 58
Loans | 461,014 |  | 461,014 |  | 368,411
Ending balance: collectively evaluated for impairment | 460,629 |  | 460,629 |  | 368,394
Commercial | Cumulative impact of adoption | ASC 326 |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance |  |  |  | (1,683) | (1,683)
Ending balance |  |  |  |  |
Commercial | Real estate |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance: individually evaluated for impairment | 378 |  | 378 |  | 7
Commercial | Non-real estate |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance: individually evaluated for impairment | 7 |  | 7 |  | 10
Municipal |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance | 698 | 2,318 | 788 | 1,247 | 1,247
Provisions (credits) | 13 | (1,491) | (77) | (1,167) |
Ending balance | 711 | 827 | 711 | 827 | 788
Ending balance: collectively evaluated for impairment | 711 |  | 711 |  | 788
Loans receivable: |  |  |  |  |
Loans | 170,991 |  | 170,991 |  | 175,304
Ending balance: collectively evaluated for impairment | 170,991 |  | 170,991 |  | 175,304
Municipal | Cumulative impact of adoption | ASC 326 |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance |  |  |  | 747 | 747
Ending balance |  |  |  |  |
Commercial real estate |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance | 14,470 | 15,692 | 14,153 | 17,915 | 17,915
Recoveries |  |  |  | 1 |
Provisions (credits) | 686 | (731) | 1,003 | 389 |
Ending balance | 15,156 | 14,961 | 15,156 | 14,961 | 14,153
Ending balance: individually evaluated for impairment | 415 |  | 415 |  | 21
Ending balance: collectively evaluated for impairment | 14,741 |  | 14,741 |  | 14,132
Loans receivable: |  |  |  |  |
Loans |  |  |  |  | 2,598
Loans | 1,793,652 |  | 1,793,652 |  | 1,863,118
Ending balance: collectively evaluated for impairment | 1,788,513 |  | 1,788,513 |  | 1,860,144
Commercial real estate | Cumulative impact of adoption | ASC 326 |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance |  |  |  | (3,344) | (3,344)
Ending balance |  |  |  |  |
Commercial real estate | Real estate |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance: individually evaluated for impairment | 5,139 |  | 5,139 |  | 2,974
Residential real estate |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance | 4,258 | 3,868 | 3,782 | 3,072 | 3,072
Recoveries | 2 | 3 | 4 | 19 |
Provisions (credits) | (30) | (104) | 444 | (291) |
Ending balance | 4,230 | 3,767 | 4,230 | 3,767 | 3,782
Ending balance: collectively evaluated for impairment | 4,230 |  | 4,230 |  | 3,782
Loans receivable: |  |  |  |  |
Loans | 369,671 |  | 369,671 |  | 360,803
Ending balance: collectively evaluated for impairment | 368,344 |  | 368,344 |  | 359,054
Residential real estate | Cumulative impact of adoption | ASC 326 |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance |  |  |  | 967 | 967
Ending balance |  |  |  |  |
Residential real estate | Real estate |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance: individually evaluated for impairment | 1,327 |  | 1,327 |  | 1,749
Consumer |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance | 884 | 1,085 | 900 | 873 | 873
Charge-offs | (94) | (77) | (197) | (148) |
Recoveries | 38 | 44 | 83 | 93 |
Provisions (credits) | 27 | (140) | 69 | 64 |
Ending balance | 855 | $ 912 | 855 | 912 | 900
Ending balance: collectively evaluated for impairment | 855 |  | 855 |  | 900
Loans receivable: |  |  |  |  |
Loans |  |  | 197 |  | 369
Loans | 74,225 |  | 74,225 |  | 82,261
Ending balance: collectively evaluated for impairment | $ 74,225 |  | $ 74,225 |  | 82,261
Consumer | Cumulative impact of adoption | ASC 326 |  |  |  |  |
Allowance for loan losses: |  |  |  |  |
Beginning Balance |  |  |  | $ 30 | $ 30
Ending balance |  |  |  |  |

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