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Deferred Policy Acquisition Costs - Schedule of Major Categories of the Deferred Policy Acquisition Costs (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Deferred Charges, Insurers [Abstract] |  |  |  |
Agents’ commissions | $ 12,578 | $ 12,527 |  |
Premium taxes | 2,587 | 2,696 |  |
Deferred underwriting expenses | 2,236 | 1,836 |  |
Total deferred policy acquisition costs | $ 17,401 | $ 17,059 | $ 17,810 | $ 19,048

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