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Fair Value - Fair Value Measurement (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assumed Gain From Loan Sale | $ 12,573 |  |
Interest Rate Movement Effect | (4,623) |  |
Servicing Rights Value | 35,740 |  |
Security Price Change | 1,842 |  |
Total Fair Value Measurement | 45,532 |  | $ 49,034
Mortgage Banking | Level 2 | Fair Value, Recurring | Rate Lock Commitments |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | 2,485,351 |  |
Assumed Gain From Loan Sale | 10,553 |  |
Interest Rate Movement Effect | (3,686) |  |
Servicing Rights Value | 30,456 |  |
Total Fair Value Measurement | 37,323 |  |
Mortgage Banking | Level 2 | Fair Value, Recurring | Forward Sales Contracts |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | 2,476,295 |  |
Security Price Change | 1,842 |  |
Total Fair Value Measurement | 1,842 |  |
Mortgage Banking | Level 2 | Fair Value, Recurring | Mortgages Held for Sale |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assumed Gain From Loan Sale | 2,020 |  |
Interest Rate Movement Effect | (937) |  |
Servicing Rights Value | 5,284 |  |
Fair value, option, changes in fair value, gain (loss) | 6,367 | $ (6,349) |
Fair Value, principal amount, loans held for sale | $ 386,576 | $ 216,211 |

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