Premiums Receivable - Summary of Activity in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Premiums Receivable, Allowance for Doubtful Accounts [Roll Forward]
Balance, beginning of year	$ 4,238	$ 4,674
Provision for credit loss expense	1,466	656
Write-offs	(1,532)	(1,092)
Balance, end of year	$ 4,172	$ 4,238