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Loans Held for Sale - Composition of Loans Held for Sale (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Financing Receivable, Credit Quality Indicator [Line Items] |  |
Multifamily loans, at lower of cost or fair value | $ 0 | $ 4,079
Total commercial loans held for sale | 0 | 4,079
Home equity conversion mortgages, at lower of cost or fair value | 0 | 507
Residential mortgage loans, at fair value | 1,215 | 322
Personal installment loans, at lower of cost or fair value | 151,040 | 133,801
Other installment loans, at lower of cost or fair value | 0 | 189,603
Other installment loans, at fair value | 188,062 | 0
Total consumer loans held for sale | 340,317 | 324,233
Loans held for sale | 340,317 | 328,312
Nonperforming |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans held for sale | $ 500 | $ 6,200

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