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Fair Value - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) $ / shares | Dec. 31, 2022 USD ($)
Servicing Assets At Fair Value [Line Items] |  |
Servicing rights of sold loans | $ 2,100,000,000 | $ 2,160,000,000
Weighted average net servicing fee income, Basis points | 0.283% |
Weighted average prepayment speed assumption used in the fair value | 8.05% |
Weighted average discount rate | 10.30% |
Paycheck Protection Program [Member] |  |
Servicing Assets At Fair Value [Line Items] |  |
Credit risk | $ 0 |
Minimum [Member] |  |
Servicing Assets At Fair Value [Line Items] |  |
Estimated base annual servicing costs | $ / shares | 75 |
Weighted average discount rate | 10.00% |
Maximum [Member] |  |
Servicing Assets At Fair Value [Line Items] |  |
Estimated base annual servicing costs | $ / shares | 85 |
Weighted average discount rate | 12.00% |
2 Corporate Bond [Member] | Level 3 [Member] |  |
Servicing Assets At Fair Value [Line Items] |  |
Purchase price | $ 750,000 |

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