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DEBT - Narrative (Details) - USD ($)
9 Months Ended
Sep. 30, 2025
Jul. 10, 2025
Dec. 31, 2024
May 31, 2024
Dec. 15, 2020
Line of Credit Facility [Line Items]          
Maximum borrowing capacity $ 489,900,000        
Outstanding balance on credit facility 0   $ 0    
Surplus Notes          
Line of Credit Facility [Line Items]          
Principal amount         $ 50,000,000
Interest expense 2,578,000        
Senior Notes          
Line of Credit Facility [Line Items]          
Interest expense $ 5,507,000        
Senior Notes | Series A Senior Unsecured Notes Due 2039          
Line of Credit Facility [Line Items]          
Principal amount       $ 70,000,000  
Applicable rate   9.00%      
Debt issuance costs, gross   $ 3,050,000      
Senior Notes | Series B Senior Unsecured Notes Due 2039          
Line of Credit Facility [Line Items]          
Principal amount   $ 30,000,000      
Applicable rate   9.00%      
Debt issuance costs, gross   $ 1,098,000      
Federal Home Loan Bank Advances          
Line of Credit Facility [Line Items]          
Maximum borrowing capacity as a percentage of total assets 20.00%