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Loans Held for Sale - Composition of Loans Held for Sale (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Receivables Held-for-sale [Abstract] |  |
Multi-family loans, at lower of cost or fair value | $ 19,251 | $ 0
Commercial and industrial loans, at lower of cost or fair value | 0 | 55,683
Commercial real estate non-owner occupied loans, at lower of cost or fair value | 0 | 17,251
Total commercial loans held for sale | 19,251 | 72,934
Home equity conversion mortgages, at lower of cost or fair value | 643 | 643
Residential mortgage loans, at fair value | 1,205 | 5,509
Installment loans, at lower of cost or fair value | 25,007 | 0
Total consumer loans held for sale | 26,855 | 6,152
Loans held for sale | $ 46,106 | $ 79,086

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