Fair Value Measurements - Summarizes Carrying Value and Estimated Fair Values of Financial Instruments not Carried at Fair Value (Detail) - USD ($) $ in Thousands |
Sep. 30, 2022 |
Dec. 31, 2021 |
Nov. 23, 2021 |
---|---|---|---|
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | |||
Carrying Value | $ 105,882 | $ 106,985 | |
Estimated Fair Value | 104,558 | 106,187 | |
Surplus note | |||
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | |||
Carrying Value | $ 5,882 | 6,985 | |
Unsecured Debt | 5.625% Senior Unsecured Notes Due 2026 | |||
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | |||
Stated percentage | 5.625% | 5.625% | |
Surplus note | Surplus note | |||
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | |||
Carrying Value | $ 5,882 | 6,985 | |
Estimated Fair Value | 5,516 | 6,723 | |
5.625% Senior unsecured notes | |||
Fair Value Measurement Inputs and Valuation Techniques [Line Items] | |||
Carrying Value | 100,000 | 100,000 | |
Estimated Fair Value | $ 99,042 | $ 99,464 |