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v3.22.1

Long-term Debt - Additional Information (Detail) |  | 1 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 23, 2021 USD ($) d | Aug. 31, 2021 USD ($) | Mar. 31, 2022 | Dec. 31, 2006 USD ($)
Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 35,000,000 |  |
Line of credit facility, unused capacity, commitment fee percentage |  | 0.50% |  |
Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, expiration period |  | 364 days |  |
Prime Rate | Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate |  | 2.00% |  |
Surplus note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured term loan agreement |  |  |  | $ 25,000,000
Note term |  |  |  | 20 years
Unsecured Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repurchased amount | $ 100,000,000 |  |  |
Unsecured Debt | 5.625% Senior Unsecured Notes Due 2026 Member |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured term loan agreement | $ 100,000,000 |  |  |
Stated percentage |  |  | 5.625% |
Maturity year of debt instrument | 2026 |  |  |
Debt instrument, convertible, threshold percentage of stock price trigger | 0.25% |  |  |
Debt instrument, convertible, threshold trading days | d | 120 |  |  |
Debt instrument, convertible, threshold consecutive trading days | d | 90 |  |  |
Unsecured Debt | 5.625% Senior Unsecured Notes Due 2026 Member | Debt Instrument, Redemption, Period One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price | 102.8125% |  |  |
Unsecured Debt | 5.625% Senior Unsecured Notes Due 2026 Member | Debt Instrument, Redemption, Period Two |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price | 101.40625% |  |  |
Unsecured Debt | 5.625% Senior Unsecured Notes Due 2026 Member | Debt Instrument, Redemption, Period Three |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Redemption price | 100.00% |  |  |
Unsecured Debt | 5.625% Senior Unsecured Notes Due 2026 Member | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, convertible, threshold percentage of stock price trigger | 0.50% |  |  |

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