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v3.25.0.1

Borrowings - Additional Information (Detail) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
May 31, 2027 | Dec. 31, 2024 | Dec. 31, 2023
Debt Instrument [Line Items] |  |  |
Funds borrowed under repurchase agreement |  | $ 261,887 | $ 271,642
Weighted average interest rates |  | 0.72% | 0.29%
Loans Pledged As Collaterals |  | $ 4,440,000 |
Borrowing Rate |  | 4.60% |
Higher cost borrowings |  | $ 500,000 |
Collateral Pledged [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Investment securities at carrying value |  | 4,790,000 |
Federal Home Loan Bank Advances and Other Borrowings [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rates |  |  | 5.70%
Other Loans Payable Long Term |  | 500,000 |
Borrowing Rate |  |  | 4.78%
Higher cost borrowings |  |  | $ 160,000
Short term borrowings |  |  | 2,070,000
Short Term Advances |  |  | $ 1,910,000
FederalHomeLoanBankAdvancesMayTwoThousandTwentySixMember |  |  |
Debt Instrument [Line Items] |  |  |
Maturities of advances BTFP |  | $ 300,000 |
DebtInstrumentInterestRateEffectivePercentage |  | 4.73% |
FederalHomeLoanBankAdvancesMayTwoThousandTwentySevenMember |  |  |
Debt Instrument [Line Items] |  |  |
Maturities of advances BTFP | $ 200,000 |  |
DebtInstrumentInterestRateEffectivePercentage | 4.27% |  |

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