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v3.25.1

Loans and Allowance for Credit Losses - Narrative (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 USD ($) loan | Mar. 31, 2024 USD ($) loan | Dec. 31, 2024 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 17,094,078,000 |  | $ 17,005,937,000
Loan premiums and discounts | 6,100,000 |  | 7,200,000
Deferred origination costs and fees | 8,400,000 |  | 9,600,000
Financing receivable, accrued interest excluded from amortized costs | 78,700,000 |  | 78,800,000
Nonaccrual loans with no allowance for credit loss | $ 1,100,000 |  | 1,700,000
Number of loan modifications | loan | 0 |  |
Financing receivable, collateral dependent, amount | $ 95,399,000 |  | 102,580,000
Provision for credit loss expense | 26,797,000 | $ 10,206,000 |
Unfunded Loan Commitment |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Unfunded commitments, allowance for credit loss | 25,600,000 |  | 25,600,000
Reserve for unfunded commitments, expensed (released) | $ 0 |  |
Commercial Loan |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of loans experiencing financial difficulty, modified, subsequent default | loan | 1 | 1 |
Loan modified and subsequently defaulted | $ 26,900,000 | $ 23,000 |
Loans, Excluding Acquired Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Provision for credit loss expense | 26,797,000 | $ 10,206,000 |
Loans, Excluding Acquired Loans | Nonperforming |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Provision for credit loss expense | $ 15,600,000 |  |
Number of credit relationships migrated to nonperforming | loan | 2 |  |
Residential Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans in process of foreclosure, amount | $ 5,900,000 |  | 4,000,000
Residential Real Estate | OREO Received in Full or Partial Satisfaction of Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Foreclosed assets and other real estate owned | 1,200,000 |  | 1,300,000
Paycheck Protection Program Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 1,000,000.0 |  | $ 1,600,000
Minimum |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing receivable, term of loan | 1 year |  |
Maximum |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing receivable, term of loan | 3 years |  |

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