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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 |  | 12 Months Ended
--- | --- | ---
Jul. 01, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Allowance for loan losses: |  |  |  |
Beginning Balance |  | $ 21,895 | $ 27,472 | $ 28,383
Charge-offs |  | (1,885) | (3,025) | (787)
Recoveries |  | 794 | 165 | 325
(Credits) provisions |  | 4,803 | 566 | (449)
Ending balance |  | 41,776 | 21,895 | 27,472
Ending balance: individually evaluated for impairment |  | 949 | 31 | 40
Ending balance: collectively evaluated for impairment |  | 40,827 | 21,864 | 27,432
Loans receivable: |  |  |  |
Loans |  | 3,993,505 | 2,849,897 | 2,730,116
Ending balance: individually evaluated for impairment |  |  |  | 3,921
Ending balance: collectively evaluated for impairment |  | 3,971,341 | 2,845,157 | 2,726,195
Cumulative impact of adoption | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | (3,283) |
Ending balance |  |  |  | (3,283)
Adjusted Balance | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 24,189 |
Ending balance |  |  |  | 24,189
Non-PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 14,328 |  |
PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 1,841 |  |
Ending balance | $ 1,800 |  |  |
Real estate |  |  |  |
Loans receivable: |  |  |  |
Ending balance: individually evaluated for impairment |  | 19,444 | 4,730 |
Non-real estate |  |  |  |
Loans receivable: |  |  |  |
Ending balance: individually evaluated for impairment |  | 2,720 | 10 |
Commercial |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  | 2,272 | 4,365 | 6,498
Charge-offs |  | (51) | (58) | (161)
Recoveries |  | 90 | 11 | 40
(Credits) provisions |  | 1,097 | (363) | (2,012)
Ending balance |  | 6,004 | 2,272 | 4,365
Ending balance: individually evaluated for impairment |  | 325 | 10 | 19
Ending balance: collectively evaluated for impairment |  | 5,679 | 2,262 | 4,346
Loans receivable: |  |  |  |
Loans |  | 648,102 | 368,411 | 433,048
Ending balance: individually evaluated for impairment |  |  |  | 98
Ending balance: collectively evaluated for impairment |  | 646,189 | 368,394 | 432,950
Commercial | Cumulative impact of adoption | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | (1,683) |
Ending balance |  |  |  | (1,683)
Commercial | Adjusted Balance | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 2,682 |
Ending balance |  |  |  | 2,682
Commercial | Non-PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 2,259 |  |
Commercial | PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 337 |  |
Commercial | Real estate |  |  |  |
Loans receivable: |  |  |  |
Ending balance: individually evaluated for impairment |  | 906 | 7 |
Commercial | Non-real estate |  |  |  |
Loans receivable: |  |  |  |
Ending balance: individually evaluated for impairment |  | 1,007 | 10 |
Municipal |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  | 788 | 1,247 | 1,955
(Credits) provisions |  | (289) | (1,206) | (708)
Ending balance |  | 1,072 | 788 | 1,247
Ending balance: collectively evaluated for impairment |  | 1,072 | 788 | 1,247
Loans receivable: |  |  |  |
Loans |  | 187,918 | 175,304 | 166,210
Ending balance: collectively evaluated for impairment |  | 187,918 | 175,304 | 166,210
Municipal | Cumulative impact of adoption | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 747 |
Ending balance |  |  |  | 747
Municipal | Adjusted Balance | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 1,994 |
Ending balance |  |  |  | 1,994
Municipal | Non-PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 502 |  |
Municipal | PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 71 |  |
Commercial real estate |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  | 14,153 | 17,915 | 15,928
Charge-offs |  | (282) | (2,598) | (284)
Recoveries |  | 69 | 1 | 110
(Credits) provisions |  | 3,344 | 2,179 | 2,161
Ending balance |  | 21,804 | 14,153 | 17,915
Ending balance: individually evaluated for impairment |  | 190 | 21 |
Ending balance: collectively evaluated for impairment |  | 21,614 | 14,132 | 17,915
Loans receivable: |  |  |  |
Loans |  | 2,294,113 | 1,863,118 | 1,709,827
Ending balance: individually evaluated for impairment |  |  |  | 2,063
Ending balance: collectively evaluated for impairment |  | 2,278,503 | 1,860,144 | 1,707,764
Commercial real estate | Cumulative impact of adoption | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | (3,344) |
Ending balance |  |  |  | (3,344)
Commercial real estate | Adjusted Balance | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 14,571 |
Ending balance |  |  |  | 14,571
Commercial real estate | Non-PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 4,149 |  |
Commercial real estate | PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 371 |  |
Commercial real estate | Real estate |  |  |  |
Loans receivable: |  |  |  |
Ending balance: individually evaluated for impairment |  | 15,326 | 2,974 |
Commercial real estate | Non-real estate |  |  |  |
Loans receivable: |  |  |  |
Ending balance: individually evaluated for impairment |  | 284 |  |
Residential real estate |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  | 3,782 | 3,072 | 3,209
Charge-offs |  |  |  | (31)
Recoveries |  | 16 | 24 | 4
(Credits) provisions |  | (1,127) | (281) | (110)
Ending balance |  | 4,924 | 3,782 | 3,072
Ending balance: individually evaluated for impairment |  |  |  | 21
Ending balance: collectively evaluated for impairment |  | 4,924 | 3,782 | 3,051
Loans receivable: |  |  |  |
Loans |  | 551,383 | 360,803 | 330,728
Ending balance: individually evaluated for impairment |  |  |  | 1,760
Ending balance: collectively evaluated for impairment |  | 548,171 | 359,054 | 328,968
Residential real estate | Cumulative impact of adoption | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 967 |
Ending balance |  |  |  | 967
Residential real estate | Adjusted Balance | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 4,039 |
Ending balance |  |  |  | 4,039
Residential real estate | Non-PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 1,785 |  |
Residential real estate | PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 468 |  |
Residential real estate | Real estate |  |  |  |
Loans receivable: |  |  |  |
Ending balance: individually evaluated for impairment |  | 3,212 | 1,749 |
Consumer |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  | 900 | 873 | 793
Charge-offs |  | (892) | (369) | (311)
Recoveries |  | 478 | 129 | 171
(Credits) provisions |  | 264 | 237 | 220
Ending balance |  | 2,540 | 900 | 873
Ending balance: collectively evaluated for impairment |  | 2,540 | 900 | 873
Loans receivable: |  |  |  |
Loans |  | 132,869 | 82,261 | 90,303
Ending balance: collectively evaluated for impairment |  | 132,869 | 82,261 | 90,303
Consumer | Cumulative impact of adoption | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | 30 |
Ending balance |  |  |  | 30
Consumer | Adjusted Balance | ASC 326 |  |  |  |
Allowance for loan losses: |  |  |  |
Beginning Balance |  |  | $ 903 |
Ending balance |  |  |  | $ 903
Consumer | Non-PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 1,470 |  |
Consumer | PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 320 |  |
Equipment Financing |  |  |  |
Allowance for loan losses: |  |  |  |
Charge-offs |  | (660) |  |
Recoveries |  | 141 |  |
(Credits) provisions |  | 1,514 |  |
Ending balance |  | 5,432 |  |
Ending balance: individually evaluated for impairment |  | 434 |  |
Ending balance: collectively evaluated for impairment |  | 4,998 |  |
Loans receivable: |  |  |  |
Loans |  | 179,120 |  |
Ending balance: collectively evaluated for impairment |  | 177,691 |  |
Equipment Financing | Non-PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 4,163 |  |
Equipment Financing | PCD loans |  |  |  |
Allowance for loan losses: |  |  |  |
Gross-up for PCD Allowance for Credit Losses at Acquisition |  | 274 |  |
Equipment Financing | Non-real estate |  |  |  |
Loans receivable: |  |  |  |
Ending balance: individually evaluated for impairment |  | $ 1,429 |  |

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