Long-Term Debt - Estimate of Principal Payments to be Made for the Amount Due on the Surplus Note (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
2022	$ 1,471
2023	1,471
2024	1,471
2025	1,471
2026	101,101
Thereafter	0
Total long-term debt maturities	106,985	$ 8,456
Less: unamortized debt issuance costs	(3,309)	0
Total long-term debt maturities, net	$ 103,676	$ 8,456

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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