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Fair Value - Fair Value Measurement (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Assumed Gain From Loan Sale | $ 7,906 |
Interest Rate Movement Effect | (29,157) |
Servicing Rights Value | 33,167 |
Security Price Change | 5,700 |
Total Fair Value Measurement Gain/(Loss) | 17,616 | $ 49,034
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Rate lock commitments |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative, Notional Amount | 2,006,907 |
Assumed Gain From Loan Sale | 6,540 |
Interest Rate Movement Effect | (25,058) |
Servicing Rights Value | 27,714 |
Security Price Change | 0 |
Total Fair Value Measurement Gain/(Loss) | 9,196 |
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Forward sales contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative, Notional Amount | 2,140,042 |
Assumed Gain From Loan Sale | 0 |
Interest Rate Movement Effect | 0 |
Servicing Rights Value | 0 |
Security Price Change | 5,700 |
Total Fair Value Measurement Gain/(Loss) | 5,700 |
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Mortgages held for sale |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative, Notional Amount | 352,489 | 216,211
Assumed Gain From Loan Sale | 1,366 |
Interest Rate Movement Effect | (4,099) |
Servicing Rights Value | 5,453 |
Security Price Change | 0 |
Total Fair Value Measurement Gain/(Loss) | $ 2,720 | $ 6,349

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