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Other Borrowings - Summary of Balances of Other Borrowings (Detail) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Instrument [Line Items] |  |
Total other borrowings | $ 392,409 | $ 632,582
4.75% Fixed Rated Collateralized Borrowings |  |
Debt Instrument [Line Items] |  |
Other secured financings | $ 200,000 | $ 200,000
Collateralized borrowing, fixed rate | 4.75% | 4.75%
5.69% Fixed Rated Collateralized Borrowings |  |
Debt Instrument [Line Items] |  |
Other secured financings | $ 167,000 | $ 0
Collateralized borrowing, fixed rate | 5.69% | 5.69%
5.70% Fixed Rated Collateralized Borrowings |  |
Debt Instrument [Line Items] |  |
Other secured financings | $ 0 | $ 400,000
Collateralized borrowing, fixed rate | 5.70% | 5.70%
0.05% Fixed Rate Collateralized Borrowings |  |
Debt Instrument [Line Items] |  |
Other secured financings | $ 25,409 | $ 32,582
Collateralized borrowing, fixed rate | 0.05% | 0.05%

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