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Schedule of Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Investments, Debt and Equity Securities [Abstract] |  |
Fixed maturities | $ (5,039) | $ (12,731)
Foreign currency fluctuations | (164) | (259)
Deferred taxes | 1,003 | 2,580
Accumulated other comprehensive income (loss), net of tax | $ (4,200) | $ (10,410)

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