Reinsurance - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Insurance [Abstract]
Paid losses recoverable outstanding due date	90 days
Received reinsurance recoveries	$ 1,800,000	$ 300,000	$ 16,000,000
Paid losses recoverable past due	$ 0
Unsecured reinsurance recoverable by reinsurer reporting threshold	1.50%