v3.25.2
Investments - Summary of Contractual Maturities of Fixed Maturity Securities Available-For-Sale (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Amortized cost    
Due one year or less $ 237,116  
Due after one year through five years 1,552,510  
Due after five years through ten years 2,299,977  
Due after ten years 547,561  
Subtotal 4,637,164  
Amortized cost 6,012,143 $ 5,876,502
Fair value    
Due one year or less 236,084  
Due after one year through five years 1,508,787  
Due after five years through ten years 2,244,148  
Due after ten years 544,512  
Subtotal 4,533,531  
Fair value 5,896,818 5,624,773
Residential mortgage-backed    
Amortized cost    
Residential mortgage-backed and other asset-backed, amortization 260,372  
Amortized cost 260,372 8,394
Fair value    
Residential mortgage-backed and other asset-backed, fair value 261,415  
Fair value 261,415 8,364
Commercial mortgage-backed    
Amortized cost    
Residential mortgage-backed and other asset-backed, amortization 48,224  
Amortized cost 48,224  
Fair value    
Residential mortgage-backed and other asset-backed, fair value 48,809  
Fair value 48,809  
Other asset-backed    
Amortized cost    
Residential mortgage-backed and other asset-backed, amortization 1,066,383  
Amortized cost 1,066,383 1,214,928
Fair value    
Residential mortgage-backed and other asset-backed, fair value 1,053,063  
Fair value $ 1,053,063 $ 1,189,465