Losses and Loss Adjustment Expenses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reserves For Losses And Loss Adjustment Expenses [Line Items]
Prior periods	$ 4,818	$ 922	$ 4,818	$ 4,789
Total incurred, net of reinsurance	78,324	$ 61,890	158,246	$ 122,455
Citizens [Member]
Reserves For Losses And Loss Adjustment Expenses [Line Items]
Total incurred, net of reinsurance	16,782		38,460
Accident Year 2023 and Prior [Member]
Reserves For Losses And Loss Adjustment Expenses [Line Items]
Prior periods	$ 4,818		$ 4,818