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Fair Value - Additional Information (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) $ / shares | Dec. 31, 2023 USD ($)
Servicing Assets At Fair Value [Line Items] |  |  |
Servicing rights of sold loans |  | $ 33,900 | $ 2,100,000
Sale of mortgage servicing rights | $ 1,940,000 |  |
Weighted average net servicing fee income, Basis points |  | 0.25% |
Weighted average prepayment speed assumption used in the fair value |  | 9.58% |
Weighted average discount rate |  | 9.00% |
Impairment charge | $ 8,500 | $ 8,500 |
Minimum [Member] |  |  |
Servicing Assets At Fair Value [Line Items] |  |  |
Estimated base annual servicing costs | $ / shares |  | 70 |
Weighted average discount rate |  | 9.00% |
Maximum [Member] |  |  |
Servicing Assets At Fair Value [Line Items] |  |  |
Estimated base annual servicing costs | $ / shares |  | 85 |
Weighted average discount rate |  | 11.00% |
Two Corporate Bond [Member] | Level 3 [Member] |  |  |
Servicing Assets At Fair Value [Line Items] |  |  |
Amortized cost basis |  | $ 750 | $ 750

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