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Fair Value - Additional Information (Detail) - Level 3 [Member] - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Two Corporate Bond [Member] |  |
Servicing Assets At Fair Value [Line Items] |  |
Amortized cost basis | $ 0.8 | $ 0.8
One Corporate Bond [Member] |  |
Servicing Assets At Fair Value [Line Items] |  |
Amortized cost basis | $ 0.5 | $ 0.5

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