Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Face (par) amount of the original debt instrument that was repurchased.

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No definition available.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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No definition available.

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Period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Long-term Debt - Additional Information (Detail) - USD ($)		6 Months Ended
	Nov. 23, 2021	Jun. 30, 2024	Jun. 01, 2024	May 31, 2024	Jun. 30, 2023	Nov. 09, 2006
2022 Revolving Loan \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 40,000,000
2023 Revolving Loan \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt term			364 days
Line of credit facility, maximum borrowing capacity				$ 50,000,000
Debt instrument, basis spread on variable rate		2.00%
Line of credit facility, unused capacity, commitment fee percentage		0.50%
Surplus note
Debt Instrument [Line Items]
Unsecured term loan agreement						$ 25,000,000
Debt term						20 years
Unsecured Debt
Debt Instrument [Line Items]
Repurchased amount	$ 100,000,000
Unsecured Debt \| 5.625% Senior Unsecured Notes Due 2026
Debt Instrument [Line Items]
Unsecured term loan agreement	$ 100,000,000
Stated percentage	5.625%	5.625%
Maturity year of debt instrument	2026
Unsecured Debt \| 5.625% Senior Unsecured Notes Due 2026 \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price	102.8125%
Unsecured Debt \| 5.625% Senior Unsecured Notes Due 2026 \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Redemption price	101.40625%
Unsecured Debt \| 5.625% Senior Unsecured Notes Due 2026 \| Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price	100.00%