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Loans and Allowance for Credit Losses - Narrative (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) loan category Category borrower | Dec. 31, 2022 USD ($) loan property borrower | Dec. 31, 2021 USD ($)
Activity in the allowance for loan losses: |  |  |
Servicing asset | $ 184,300,000 | $ 164,100,000 |
Foreclosed properties held | $ 800,000 | $ 1,200,000 |
Number foreclosed properties held | property |  | 5 |
Number of additional collateralized loans in the process of foreclosure | loan |  | 10 |
Investment in loans in the process of foreclosure |  | $ 2,100,000 |
Number of points in internal risk rating system | category | 9 |  |
Number of categories in internal risk rating system considered as not criticized | Category | 6 |  |
Commercial relationship credit review threshold amount | $ 1,000,000 |  |
Total impaired loans, recorded investment | 11,800,000 | 18,247,000 |
Impaired loans with specific allowance, related allowance | 1,900,000 | 1,743,000 |
Provision (release of allowance) for credit losses | (1,921,000) | 14,194,000 | $ (6,275,000)
Total loans modified in period | 22,192,000 |  |
Specific reserve allocations for TDR's |  | 400,000 |
Troubled debt restructuring loans |  | 10,400,000 |
Loans defaulted under the restructured terms | $ 2,634,000 |  |
Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Number of loans modified in period | loan | 18 |  |
Number of borrowers with modified loans | borrower | 17 |  |
Total loans modified in period | $ 19,736,000 |  |
Loans defaulted under the restructured terms | $ 2,634,000 |  |
Minimum |  |  |
Activity in the allowance for loan losses: |  |  |
Percentage of commercial outstanding loan balances | 40.00% |  |
Maximum |  |  |
Activity in the allowance for loan losses: |  |  |
Percentage of commercial outstanding loan balances | 45.00% |  |
Accruing |  |  |
Activity in the allowance for loan losses: |  |  |
Troubled debt restructuring loans |  | $ 4,700,000 |
Accruing | Troubled Debt Restructured Loans | Portfolio Risk |  |  |
Activity in the allowance for loan losses: |  |  |
Percentage of total impaired loans |  | 45.00% |
Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Amortized costs basis modified, past due | $ 5,490,000 |  |
Acquisition, development and construction |  |  |
Activity in the allowance for loan losses: |  |  |
Loans defaulted under the restructured terms |  | $ 5,700,000 |
Number of loans to defaulted borrowers | loan |  | 9 |
Number of borrowers defaulted | borrower |  | 7 |
Acquisition, development and construction | Commercial Borrower One |  |  |
Activity in the allowance for loan losses: |  |  |
Loans defaulted under the restructured terms |  | $ 1,900,000 |
Acquisition, development and construction | Commercial Borrower Three |  |  |
Activity in the allowance for loan losses: |  |  |
Loans defaulted under the restructured terms |  | 3,100,000 |
Acquisition, development and construction | Commercial Borrowers Four through Seven |  |  |
Activity in the allowance for loan losses: |  |  |
Loans defaulted under the restructured terms |  | 200,000 |
Restructured Equipment Loan | Commercial Borrower Two |  |  |
Activity in the allowance for loan losses: |  |  |
Loans defaulted under the restructured terms |  | 500,000 |
Unfunded Loan Commitment |  |  |
Activity in the allowance for loan losses: |  |  |
Provision (release of allowance) for credit losses | $ (600,000) | 0 | $ 0
Residential real estate |  |  |
Activity in the allowance for loan losses: |  |  |
Foreclosed properties held |  | $ 200,000 |
Number foreclosed properties held | loan | 0 |  |
Increase (decrease) in impaired loans (percentage) |  | 16.70% |
Total impaired loans, recorded investment |  | $ 3,098,000 |
Impaired loans with specific allowance, related allowance |  | $ 0 |
Total loans modified in period | $ 0 |  |
Loans defaulted under the restructured terms | 0 |  |
Residential real estate | Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Total loans modified in period | 0 |  |
Loans defaulted under the restructured terms | 0 |  |
Residential real estate | Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Amortized costs basis modified, past due | $ 0 |  |
Total Commercial |  |  |
Activity in the allowance for loan losses: |  |  |
Number foreclosed properties held | loan | 2,000,000 |  |
Increase (decrease) in impaired loans (percentage) |  | 83.30% |
Total impaired loans, recorded investment |  | $ 13,708,000 |
Impaired loans with specific allowance, related allowance |  | 1,475,000 |
Total loans modified in period | $ 22,192,000 |  |
Loans defaulted under the restructured terms | 2,634,000 |  |
Total Commercial | Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Total loans modified in period | 19,736,000 |  |
Loans defaulted under the restructured terms | 2,634,000 |  |
Total Commercial | Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Amortized costs basis modified, past due | 5,490,000 |  |
Total Commercial | Real estate |  |  |
Activity in the allowance for loan losses: |  |  |
Total impaired loans, recorded investment |  | 1,786,000 |
Impaired loans with specific allowance, related allowance |  | 222,000 |
Total loans modified in period | 12,903,000 |  |
Loans defaulted under the restructured terms | 0 |  |
Total Commercial | Real estate | Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Total loans modified in period | 11,201,000 |  |
Loans defaulted under the restructured terms | 0 |  |
Total Commercial | Real estate | Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Amortized costs basis modified, past due | 0 |  |
Total Commercial | Business |  |  |
Activity in the allowance for loan losses: |  |  |
Total impaired loans, recorded investment |  | 11,922,000 |
Impaired loans with specific allowance, related allowance |  | 1,253,000 |
Total loans modified in period | $ 8,535,000 |  |
Number of modified loans, subsequent default | loan | 2,000,000 |  |
Loans defaulted under the restructured terms | $ 2,634,000 |  |
Total Commercial | Business | Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Number of loans modified in period | loan | 1 |  |
Total loans modified in period | $ 8,535,000 |  |
Loans defaulted under the restructured terms | $ 2,634,000 |  |
Total Commercial | Business | Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Number of past due modified loans | loan | 8 |  |
Amortized costs basis modified, past due | $ 5,490,000 |  |
Total Commercial | Business | Accounts Receivable | Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Number of loans modified in period | loan | 1 |  |
Total loans modified in period | $ 200,000 |  |
Total Commercial | Business | Equipment | Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Number of past due modified loans | loan | 3,000,000 |  |
Amortized costs basis modified, past due | $ 1,700,000 |  |
Total Commercial | Business | Government-Guaranteed Collateral | Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Number of loans modified in period | loan | 16 |  |
Total loans modified in period | $ 8,300,000 |  |
Total Commercial | Business | Government-Guaranteed Collateral | Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Number of past due modified loans | loan | 5,000,000 |  |
Amortized costs basis modified, past due | $ 3,800,000 |  |
Total Commercial | Acquisition, development and construction |  |  |
Activity in the allowance for loan losses: |  |  |
Total impaired loans, recorded investment |  | 0 |
Impaired loans with specific allowance, related allowance |  | $ 0 |
Total loans modified in period | 754,000 |  |
Total Commercial | Acquisition, development and construction | Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Total loans modified in period | 0 |  |
Total Commercial | Acquisition, development and construction | Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Amortized costs basis modified, past due | 0 |  |
Consumer |  |  |
Activity in the allowance for loan losses: |  |  |
Number of additional collateralized loans in the process of foreclosure | property |  | 3 |
Investment in loans in the process of foreclosure |  | $ 1,000,000 |
Total impaired loans, recorded investment |  | 1,351,000 |
Impaired loans with specific allowance, related allowance |  | $ 268,000 |
Total loans modified in period | 0 |  |
Loans defaulted under the restructured terms | 0 |  |
Consumer | Payment Delay |  |  |
Activity in the allowance for loan losses: |  |  |
Total loans modified in period | 0 |  |
Loans defaulted under the restructured terms | 0 |  |
Consumer | Total Past Due |  |  |
Activity in the allowance for loan losses: |  |  |
Amortized costs basis modified, past due | $ 0 |  |

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