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Loans Held for Sale - Composition of Loans Held for Sale (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Residential mortgage loans, at fair value | $ 1,836 | $ 1,215
Personal installment loans, at lower of cost or fair value | 40,903 | 151,040
Other installment loans, at fair value | 162,055 | 188,062
Loans held for sale (includes $163,891 and $189,277, respectively, at fair value) | 204,794 | 340,317
Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held for sale (includes $163,891 and $189,277, respectively, at fair value) | $ 2,800 | $ 500

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