Other Borrowings (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total other borrowings	$ 266,767	$ 632,582
5.46% Fixed Rated Collateralized Borrowings
Debt Instrument [Line Items]
Collateralized borrowing, fixed rate	5.46%	5.46%
Other secured financings	$ 75,000	$ 0
5.23% Fixed Rated Collateralized Borrowings
Debt Instrument [Line Items]
Collateralized borrowing, fixed rate	5.23%	5.23%
Other secured financings	$ 75,000	$ 0
4.75% Fixed Rated Collateralized Borrowings
Debt Instrument [Line Items]
Collateralized borrowing, fixed rate	4.75%	4.75%
Other secured financings	$ 0	$ 200,000
5.70% Fixed Rated Collateralized Borrowings
Debt Instrument [Line Items]
Collateralized borrowing, fixed rate	5.70%	5.70%
Other secured financings	$ 0	$ 400,000
5.21% Fixed Rated Collateralized Borrowings
Debt Instrument [Line Items]
Collateralized borrowing, fixed rate	5.21%	5.21%
Other secured financings	$ 100,000	$ 0
0.05% Fixed Rate Collateralized Borrowings
Debt Instrument [Line Items]
Collateralized borrowing, fixed rate	0.05%	0.05%
Other secured financings	$ 16,767	$ 32,582

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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