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Investments - Schedule of Company's Net Investment Income (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Net Investment Income [Line Items]                    
Gross investment income                 $ 22,429 $ 14,577
Investment expenses                 (725) (397)
Net investment income $ 5,916 $ 6,906 $ 4,780 $ 4,103 $ 3,761 $ 3,757 $ 3,414 $ 3,248 21,704 14,180
Fixed maturities, available-for-sale                    
Net Investment Income [Line Items]                    
Gross investment income                 11,497 7,842
Short-term investments                    
Net Investment Income [Line Items]                    
Gross investment income                 396 0
Cash and cash equivalents                    
Net Investment Income [Line Items]                    
Gross investment income                 $ 10,536 $ 6,735