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Allowance for Credit Losses and Reserve for Unfunded Loan Commitments - Activity in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | $ 26,107 | $ 25,988 | $ 25,854 | $ 25,196 | $ 25,196
Charge-offs | (184) | (652) | (897) | (2,010) |
Recoveries | 50 | 48 | 108 | 466 |
Net charge-offs | (134) | (604) | (789) | (1,544) |
Provision for (credit to) credit losses charged to expense | 1,029 | 534 | 1,937 | 1,419 |
Balance, end of period | 27,002 | 25,918 | 27,002 | 25,918 | 25,854
Cumulative effect, period of adjustment |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period |  |  |  | 847 | 847
SBA loans held for investment |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | 1,457 | 1,556 | 1,221 | 875 | 875
Charge-offs | (70) | (100) | (70) | (213) | (213)
Recoveries | 7 | 1 | 21 | 16 |
Net charge-offs | (63) | (99) | (49) | (197) |
Provision for (credit to) credit losses charged to expense | (77) | 199 | 145 | 815 |
Balance, end of period | 1,317 | 1,656 | 1,317 | 1,656 | 1,221
SBA loans held for investment | Cumulative effect, period of adjustment |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period |  |  |  | 163 | 163
Commercial loans |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | 16,688 | 15,516 | 15,876 | 15,254 | 15,254
Charge-offs | (46) | (500) | (282) | (500) | (752)
Recoveries | 9 | 10 | 32 | 377 |
Net charge-offs | (37) | (490) | (250) | (123) |
Provision for (credit to) credit losses charged to expense | 923 | 325 | 1,948 | 49 |
Balance, end of period | 17,574 | 15,351 | 17,574 | 15,351 | 15,876
Commercial loans | Cumulative effect, period of adjustment |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period |  |  |  | 171 | 171
Residential mortgage loans |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | 6,213 | 6,437 | 6,529 | 5,450 | 5,450
Charge-offs |  |  |  |  | (93)
Provision for (credit to) credit losses charged to expense | 221 | (6) | (95) | 605 |
Balance, end of period | 6,434 | 6,431 | 6,434 | 6,431 | 6,529
Residential mortgage loans | Cumulative effect, period of adjustment |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period |  |  |  | 376 | 376
Consumer loans |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | 835 | 845 | 1,022 | 990 | 990
Charge-offs | (68) | (52) | (268) | (397) | (578)
Recoveries | 34 | 37 | 55 | 73 |
Net charge-offs | (34) | (15) | (213) | (324) |
Provision for (credit to) credit losses charged to expense | (2) | 130 | (10) | 193 |
Balance, end of period | 799 | 960 | 799 | 960 | 1,022
Consumer loans | Cumulative effect, period of adjustment |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period |  |  |  | 101 | 101
Residential construction loans |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | 914 | 1,634 | 1,206 | 2,627 | 2,627
Charge-offs |  |  | (277) | (900) | (1,000)
Net charge-offs |  |  | (277) | (900) |
Provision for (credit to) credit losses charged to expense | (36) | (114) | (51) | (243) |
Balance, end of period | $ 878 | $ 1,520 | $ 878 | 1,520 | 1,206
Residential construction loans | Cumulative effect, period of adjustment |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period |  |  |  | $ 36 | $ 36

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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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