v3.26.3
Related Party Transactions (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Related Party Transaction [Line Items]        
Ceded written premiums $ 106,554,000 $ 82,492,000 $ 299,823,000 $ 224,079,000
Net written premiums 149,875,000 149,023,000 471,241,000 414,645,000
Related Party        
Related Party Transaction [Line Items]        
Ceded written premiums 10,100,000 9,300,000 30,000,000.0 25,600,000
Related Party | AmFam        
Related Party Transaction [Line Items]        
Ceded written premiums 10,100,000 9,300,000 30,000,000.0 25,600,000
Net written premiums 80,800   140,600 80,000.0
Related Party | Bold Penguin        
Related Party Transaction [Line Items]        
Related party transaction, amounts of transaction 400,000 100,000 900,000 100,000
Related Party | Ceding Fees        
Related Party Transaction [Line Items]        
Related party transaction, amounts of transaction $ 5,600,000 $ 3,900,000 $ 14,600,000 $ 9,300,000
AmFam | Related Party        
Related Party Transaction [Line Items]        
Quota share agreement, percentage 100.00%   100.00%