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Long-term Debt - Additional Information (Details) - USD ($)
Jun. 30, 2023
Nov. 23, 2021
Oct. 31, 2022
Dec. 31, 2006
Revolving Credit Facility | Prime Rate        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate 2.00%      
2023 Revolving Loan | Revolving Credit Facility        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity $ 40,000,000   $ 37,500,000  
Line of credit facility, unused capacity, commitment fee percentage 0.50%      
2022 Revolving Loan | Revolving Credit Facility        
Debt Instrument [Line Items]        
Line of credit facility, expiration period 364 days      
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        
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%