v3.26.3
Investments - Unrealized Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Amortized Cost    
Total Amortized Cost $ 3,603,971 $ 1,801,109
Fair value    
Total Fair Value 3,310,412 1,660,674
Unrealized Loss    
Total Unrealized Loss $ (293,559) $ (140,435)
Percent to Total 100.00%  
NAIC Rating 1 | AAA/AA/A | Aaa/Aa/A    
Amortized Cost    
Total Amortized Cost $ 2,869,804  
Fair value    
Total Fair Value 2,618,245  
Unrealized Loss    
Total Unrealized Loss $ (251,559)  
Percent to Total 85.70%  
NAIC Rating 2 | BBB | Baa    
Amortized Cost    
Total Amortized Cost $ 627,493  
Fair value    
Total Fair Value 590,688  
Unrealized Loss    
Total Unrealized Loss $ (36,805)  
Percent to Total 12.50%  
NAIC Rating 3 | BB | Ba    
Amortized Cost    
Total Amortized Cost $ 69,396  
Fair value    
Total Fair Value 66,741  
Unrealized Loss    
Total Unrealized Loss $ (2,655)  
Percent to Total 0.90%  
NAIC Rating 4 | B | B    
Amortized Cost    
Total Amortized Cost $ 32,972  
Fair value    
Total Fair Value 31,328  
Unrealized Loss    
Total Unrealized Loss $ (1,644)  
Percent to Total 0.60%  
NAIC Rating 5 | CCC | Caa    
Amortized Cost    
Total Amortized Cost $ 3,452  
Fair value    
Total Fair Value 2,629  
Unrealized Loss    
Total Unrealized Loss $ (823)  
Percent to Total 0.30%  
NAIC Rating 6 | CC Or Lower | Ca or lower    
Amortized Cost    
Total Amortized Cost $ 854  
Fair value    
Total Fair Value 781  
Unrealized Loss    
Total Unrealized Loss $ (73)  
Percent to Total 0.00%