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Loans, net and allowance for loan losses - Changes in Allowance for Loan Losses Account by Major Classification of Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Allowance for loan losses: |  |  |
Beginning Balance | $ 28,383 | $ 27,344 | $ 22,677
Charge-offs | (787) | (956) | (3,479)
Recoveries | 325 | 245 | 746
Provisions (credits) | (449) | 1,750 | 7,400
Ending balance | 27,472 | 28,383 | 27,344
Commercial |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 8,453 | 8,734 | 6,888
Charge-offs | (161) | (492) | (2,771)
Recoveries | 40 | 89 | 525
Provisions (credits) | (2,720) | 122 | 4,092
Ending balance | 5,612 | 8,453 | 8,734
Commercial real estate |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 15,928 | 14,559 | 11,496
Charge-offs | (284) | (252) | (144)
Recoveries | 110 | 68 | 16
Provisions (credits) | 2,161 | 1,553 | 3,191
Ending balance | 17,915 | 15,928 | 14,559
Residential real estate |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 3,209 | 3,129 | 3,226
Charge-offs | (31) | (24) | (247)
Recoveries | 4 | 7 | 57
Provisions (credits) | (110) | 97 | 93
Ending balance | 3,072 | 3,209 | 3,129
Consumer |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 793 | 922 | 1,067
Charge-offs | (311) | (188) | (317)
Recoveries | 171 | 81 | 148
Provisions (credits) | 220 | (22) | 24
Ending balance | $ 873 | $ 793 | $ 922

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