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Loans and Allowance for Credit Losses - Narrative (Details) | 12 Months Ended |
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Dec. 31, 2024 USD ($) loan Category category borrower | Dec. 31, 2023 USD ($) loan property borrower | Dec. 31, 2022 USD ($) | Dec. 31, 2024 mortgage | Dec. 31, 2024 loan | Dec. 31, 2024 | Dec. 31, 2024 numberOfBank
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Servicing asset | $ 171,600,000 | $ 184,300,000 |  |  |  |  |
Foreclosed properties held | 2,800,000 | $ 800,000 |  |  |  |  |
Number foreclosed properties held | property |  | 2 |  |  |  |  |
Asset acquisition, consideration transferred | $ 500,000 |  |  |  |  |  |
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 |  |  |  |  |  |
Individually analyzed loans | 43,200,000 | $ 11,800,000 |  |  |  |  |
Individually evaluated for impairment | 1,300,000 | 1,900,000 |  |  |  |  |
Provision (release of allowance) for credit losses | $ 3,541,000 | (1,921,000) | $ 14,194,000 |  |  |  |
Number of loans modified in period | loan | 22 |  |  |  |  |  |
Total loans modified in period | $ 5,007,000 | 22,192,000 |  |  |  |  |
Maximum |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Percentage of commercial outstanding loan balances |  |  |  |  |  | 40.00% |
Minimum |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Percentage of commercial outstanding loan balances |  |  |  |  |  | 35.00% |
Total Past Due |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Amortized costs basis modified, past due | $ 2,771,000 | $ 5,490,000 |  |  |  |  |
Payment Delay |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number of loans modified in period | loan | 21 | 18 |  |  |  |  |
Number of borrowers with modified loans | borrower | 20 | 17 |  |  |  |  |
Total loans modified in period | $ 4,541,000 | $ 19,736,000 |  |  |  |  |
Term Extension |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number of loans modified in period | loan | 1,000,000 |  |  |  |  |  |
Total loans modified in period | $ 466,000 | 2,456,000 |  |  |  |  |
Unfunded Loan Commitment |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Provision (release of allowance) for credit losses | 600,000 | 600,000 | $ 600,000 |  |  |  |
Commercial: |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number foreclosed properties held |  |  |  | 2 | 1,000,000 |  |
Investment in loans in the process of foreclosure | 2,300,000 |  |  |  |  |  |
Total loans modified in period | 5,007,000 | 22,192,000 |  |  |  |  |
Commercial: | Total Past Due |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Amortized costs basis modified, past due | 2,771,000 | 5,490,000 |  |  |  |  |
Commercial: | Payment Delay |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | 4,541,000 | 19,736,000 |  |  |  |  |
Commercial: | Term Extension |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | 466,000 | 2,456,000 |  |  |  |  |
Commercial: | Business |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | 5,007,000 | $ 8,535,000 |  |  |  |  |
Number of modified loans, subsequent default | loan |  | 2 |  |  | 4,000,000 |  |
Commercial: | Business | Total Past Due |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number of past due modified loans | loan |  | 8 |  |  | 9 |  |
Number of past due modified loans, non-accrual | numberOfBank |  |  |  |  |  |  | 6,000,000
Amortized costs basis modified, past due | 2,771,000 | $ 5,490,000 |  |  |  |  |
Commercial: | Business | Government-Guaranteed Collateral | Total Past Due |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number of loans modified in period | loan |  | 5 |  |  |  |  |
Amortized costs basis modified, past due |  | $ 3,800,000 |  |  |  |  |
Commercial: | Business | Equipment | Total Past Due |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number of loans modified in period | loan |  | 3 |  |  |  |  |
Amortized costs basis modified, past due |  | $ 1,700,000 |  |  |  |  |
Commercial: | Business | Payment Delay |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number of loans modified in period | loan |  | 1,000,000 |  |  |  |  |
Total loans modified in period | $ 4,541,000 | $ 8,535,000 |  |  |  |  |
Commercial: | Business | Payment Delay | Accounts Receivable |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number of loans modified in period | loan | 1 | 1,000,000 |  |  |  |  |
Total loans modified in period | $ 200,000 | $ 200,000 |  |  |  |  |
Commercial: | Business | Payment Delay | Government-Guaranteed Collateral |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number of loans modified in period | loan | 21 | 16 |  |  |  |  |
Total loans modified in period | $ 4,800,000 | $ 8,300,000 |  |  |  |  |
Commercial: | Business | Term Extension |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | 466,000 | 0 |  |  |  |  |
Commercial: | Real estate |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | 0 | 12,903,000 |  |  |  |  |
Commercial: | Real estate | Total Past Due |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Amortized costs basis modified, past due | 0 | 0 |  |  |  |  |
Commercial: | Real estate | Payment Delay |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | 0 | 11,201,000 |  |  |  |  |
Commercial: | Real estate | Term Extension |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | 0 | 1,702,000 |  |  |  |  |
Residential real estate |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Number foreclosed properties held | loan |  |  |  |  | 7,000,000 |  |
Investment in loans in the process of foreclosure | 3,100,000 |  |  |  |  |  |
Total loans modified in period | 0 | 0 |  |  |  |  |
Residential real estate | Total Past Due |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Amortized costs basis modified, past due | 0 | 0 |  |  |  |  |
Residential real estate | Payment Delay |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | 0 | 0 |  |  |  |  |
Residential real estate | Term Extension |  |  |  |  |  |  |
Activity in the allowance for loan losses [Line Items] |  |  |  |  |  |  |
Total loans modified in period | $ 0 | $ 0 |  |  |  |  |

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