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Loans - Allowance for loan losses by segment (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | $ 50,494,000 | $ 47,996,000 | $ 40,020,000
Provision for (Recovery of) Credit Losses on Loans and Leases | 2,900,000 | 2,050,000 | 7,700,000
Loans Charged-off | (1,266,000) | (224,000) | (37,000)
Recoveries of Loans | 35,000 | 22,000 | 313,000
Total Ending Allowance Balance | 52,277,000 | 50,494,000 | 47,996,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Individually Evaluated for Impairment | 144,000 | 103,000 |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 52,133,000 | 50,391,000 |
Loans and Leases Receivable, Allowance, Total | 52,277,000 | 50,494,000 | 47,996,000
Loans, Individually Evaluated for Impairment | 24,699,000 | 35,858,000 |
Loans, Collectively Evaluated for Impairment | 3,843,815,000 | 3,688,424,000 |
Totals | 3,868,514,000 | 3,724,282,000 |
Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 650,000 |  |
Total Ending Allowance Balance |  | 650,000 |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | 650,000 |
Purchase Credit Deteriorated (PCD) Loans |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Provision for (Recovery of) Credit Losses on Loans and Leases | 114,000 |  |
Financial asset acquired with credit deterioration |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Provision for (Recovery of) Credit Losses on Loans and Leases | 950,000 |  |
Commercial |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 5,398,000 | 6,501,000 | 6,269,000
Provision for (Recovery of) Credit Losses on Loans and Leases | 120,000 | 225,000 | 235,000
Loans Charged-off |  | (180,000) | (13,000)
Recoveries of Loans | 22,000 | 10,000 | 10,000
Total Ending Allowance Balance | 5,630,000 | 5,398,000 | 6,501,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Individually Evaluated for Impairment | 133,000 | 8,000 |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 5,497,000 | 5,390,000 |
Loans and Leases Receivable, Allowance, Total | 5,630,000 | 5,398,000 | 6,501,000
Loans, Individually Evaluated for Impairment | 14,045,000 | 16,143,000 |
Loans, Collectively Evaluated for Impairment | 483,617,000 | 447,918,000 |
Totals | 497,662,000 | 464,061,000 |
Commercial | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | (1,158,000) |  |
Total Ending Allowance Balance |  | (1,158,000) |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | (1,158,000) |
Commercial | Purchase Credit Deteriorated (PCD) Loans |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Provision for (Recovery of) Credit Losses on Loans and Leases | 90,000 |  |
Leases |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Provision for (Recovery of) Credit Losses on Loans and Leases | 359,000 |  |
Loans Charged-off | (11,000) |  |
Total Ending Allowance Balance | 368,000 |  |
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Individually Evaluated for Impairment | 6,000 |  |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 362,000 |  |
Loans and Leases Receivable, Allowance, Total | 368,000 |  |
Loans, Individually Evaluated for Impairment | 34,000 |  |
Loans, Collectively Evaluated for Impairment | 44,257,000 |  |
Totals | 44,291,000 |  |
Leases | Purchase Credit Deteriorated (PCD) Loans |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Provision for (Recovery of) Credit Losses on Loans and Leases | 20,000 |  |
Construction and Land Development |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 2,156,000 | 3,911,000 | 3,139,000
Provision for (Recovery of) Credit Losses on Loans and Leases | (1,290,000) | (685,000) | 772,000
Total Ending Allowance Balance | 866,000 | 2,156,000 | 3,911,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 866,000 | 2,156,000 |
Loans and Leases Receivable, Allowance, Total | 866,000 | 2,156,000 | 3,911,000
Loans, Individually Evaluated for Impairment | 58,000 | 80,000 |
Loans, Collectively Evaluated for Impairment | 97,197,000 | 232,724,000 |
Totals | 97,255,000 | 232,804,000 |
Construction and Land Development | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | (1,070,000) |  |
Total Ending Allowance Balance |  | (1,070,000) |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | (1,070,000) |
1-4 Family Construction |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 558,000 | 845,000 | 618,000
Provision for (Recovery of) Credit Losses on Loans and Leases | (227,000) | (52,000) | 227,000
Total Ending Allowance Balance | 331,000 | 558,000 | 845,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 331,000 | 558,000 |
Loans and Leases Receivable, Allowance, Total | 331,000 | 558,000 | 845,000
Loans, Individually Evaluated for Impairment |  | 249,000 |
Loans, Collectively Evaluated for Impairment | 41,961,000 | 64,838,000 |
Totals | 41,961,000 | 65,087,000 |
1-4 Family Construction | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | (235,000) |  |
Total Ending Allowance Balance |  | (235,000) |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | (235,000) |
1-4 Family Mortgage |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 2,651,000 | 4,325,000 | 3,757,000
Provision for (Recovery of) Credit Losses on Loans and Leases | 141,000 | 99,000 | 280,000
Recoveries of Loans | 3,000 | 5,000 | 288,000
Total Ending Allowance Balance | 2,795,000 | 2,651,000 | 4,325,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 2,795,000 | 2,651,000 |
Loans and Leases Receivable, Allowance, Total | 2,795,000 | 2,651,000 | 4,325,000
Loans, Individually Evaluated for Impairment | 708,000 | 689,000 |
Loans, Collectively Evaluated for Impairment | 473,675,000 | 401,707,000 |
Totals | 474,383,000 | 402,396,000 |
1-4 Family Mortgage | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | (1,778,000) |  |
Total Ending Allowance Balance |  | (1,778,000) |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | (1,778,000) |
Multifamily |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 22,217,000 | 17,459,000 | 12,610,000
Provision for (Recovery of) Credit Losses on Loans and Leases | 903,000 | 1,440,000 | 4,849,000
Total Ending Allowance Balance | 23,120,000 | 22,217,000 | 17,459,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 23,120,000 | 22,217,000 |
Loans and Leases Receivable, Allowance, Total | 23,120,000 | 22,217,000 | 17,459,000
Loans, Collectively Evaluated for Impairment | 1,425,610,000 | 1,388,541,000 |
Totals | 1,425,610,000 | 1,388,541,000 |
Multifamily | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 3,318,000 |  |
Total Ending Allowance Balance |  | 3,318,000 |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | 3,318,000 |
CRE Owner Occupied |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 1,184,000 | 1,965,000 | 1,495,000
Provision for (Recovery of) Credit Losses on Loans and Leases | 106,000 | 162,000 | 470,000
Total Ending Allowance Balance | 1,290,000 | 1,184,000 | 1,965,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 1,290,000 | 1,184,000 |
Loans and Leases Receivable, Allowance, Total | 1,290,000 | 1,184,000 | 1,965,000
Loans, Individually Evaluated for Impairment | 1,558,000 | 1,559,000 |
Loans, Collectively Evaluated for Impairment | 189,690,000 | 174,224,000 |
Totals | 191,248,000 | 175,783,000 |
CRE Owner Occupied | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | (943,000) |  |
Total Ending Allowance Balance |  | (943,000) |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | (943,000) |
CRE Non-owner Occupied |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 16,225,000 | 12,576,000 | 11,335,000
Provision for (Recovery of) Credit Losses on Loans and Leases | 2,746,000 | 780,000 | 1,241,000
Loans Charged-off | (1,236,000) |  |
Total Ending Allowance Balance | 17,735,000 | 16,225,000 | 12,576,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Individually Evaluated for Impairment |  | 95,000 |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 17,735,000 | 16,130,000 |
Loans and Leases Receivable, Allowance, Total | 17,735,000 | 16,225,000 | 12,576,000
Loans, Individually Evaluated for Impairment | 8,278,000 | 17,138,000 |
Loans, Collectively Evaluated for Impairment | 1,074,830,000 | 970,168,000 |
Totals | 1,083,108,000 | 987,306,000 |
CRE Non-owner Occupied | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 2,869,000 |  |
Total Ending Allowance Balance |  | 2,869,000 |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | 2,869,000 |
Consumer and other |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | 105,000 | 151,000 | 147,000
Provision for (Recovery of) Credit Losses on Loans and Leases | 42,000 | 81,000 | 13,000
Loans Charged-off | (19,000) | (44,000) | (24,000)
Recoveries of Loans | 10,000 | 7,000 | 15,000
Total Ending Allowance Balance | 142,000 | 105,000 | 151,000
Allowance for loan losses and the recorded investment |  |  |
Allowance for Loan Losses and Loans, Individually Evaluated for Impairment | 5,000 |  |
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment | 137,000 | 105,000 |
Loans and Leases Receivable, Allowance, Total | 142,000 | 105,000 | 151,000
Loans, Individually Evaluated for Impairment | 18,000 |  |
Loans, Collectively Evaluated for Impairment | 12,978,000 | 8,304,000 |
Totals | 12,996,000 | 8,304,000 |
Consumer and other | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | (90,000) |  |
Total Ending Allowance Balance |  | (90,000) |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | (90,000) |
Consumer and other | Purchase Credit Deteriorated (PCD) Loans |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Provision for (Recovery of) Credit Losses on Loans and Leases | 4,000 |  |
Unallocated |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance |  | 263,000 | 650,000
Provision for (Recovery of) Credit Losses on Loans and Leases |  |  | (387,000)
Total Ending Allowance Balance |  |  | 263,000
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  |  | $ 263,000
Unallocated | Cumulative Effect of Change |  |  |
Allowance for Credit Losses for Loans and Leases: |  |  |
Beginning Balance | $ (263,000) |  |
Total Ending Allowance Balance |  | (263,000) |
Allowance for loan losses and the recorded investment |  |  |
Loans and Leases Receivable, Allowance, Total |  | $ (263,000) |

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