Other Assets - Summary of Other Assets (Detail) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Benefits receivable related to retrospective reinsurance contracts		$ 44,289	$ 16,317
ReimbursementsAndFeesReceivableUnderTPAServices		629	7,303
Prepaid expenses		2,882	2,826
Deposits		409	491
Lease acquisition costs, net		833	832
Other		1,323	3,902
Total other assets	[1]	$ 50,365	$ 31,671

[1] See Note 16 for details of balances associated with variable interest entity.