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Other Borrowings (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total other borrowings	$ 17,039	$ 89,610
5.23% Fixed Rated Collateralized Borrowings One
Debt Instrument [Line Items]
Collateralized borrowing, fixed rate	5.23%	5.23%
Other secured financings	$ 0	$ 75,000
0.05% Fixed Rate Collateralized Borrowings
Debt Instrument [Line Items]
Collateralized borrowing, fixed rate	0.05%	0.05%
Other secured financings	$ 17,039	$ 14,610

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