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Other Borrowings - Summary of Balances of Other Borrowings (Detail) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total other borrowings | $ 632,582,000 | $ 264,605,000 |
5.70% Fixed Rated Collateralized Borrowings |  |  |
Debt Instrument [Line Items] |  |  |
Other secured financings | $ 400,000,000 | 0 |
Collateralized borrowing, fixed rate | 5.70% |  |
4.75%Fixed Rated Collateralized Borrowings |  |  |
Debt Instrument [Line Items] |  |  |
Other secured financings | $ 200,000,000 | 0 |
Collateralized borrowing, fixed rate | 4.75% |  |
4.65% Fixed Rate Collateralized Borrowings |  |  |
Debt Instrument [Line Items] |  |  |
Other secured financings | $ 0 | 216,700,000 |
Collateralized borrowing, fixed rate | 4.65% |  |
0.05% Fixed Rate Collateralized Borrowings |  |  |
Debt Instrument [Line Items] |  |  |
Other secured financings | $ 32,582,000 | $ 47,905,000 |
Collateralized borrowing, fixed rate | 0.05% |  | 0.05%

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