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
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