Commitments and Contingencies - Schedule of Future Minimum Aggregate Premium Amounts Payable to Reinsurer (Detail) $ in Thousands	Sep. 30, 2022 USD ($)
Contractual Obligation, Fiscal Year Maturity [Abstract]
2022	$ 91,350
2023	91,350
Total	$ 182,700

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

No definition available.

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant