v3.26.1
Investments - Fixed-maturity Securities Classified by Contractual Maturity Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Available-for-sale Securities, Debt Maturities [Abstract]    
Total available-for-sale fixed-maturity securities $ 3,471,682 $ 3,265,246
Fixed Maturities    
Available-for-sale Securities, Debt Maturities [Abstract]    
Due in one year or less, amortized cost 352,746  
Due after one year through five years, amortized cost 881,426  
Due after five years through 10 years, amortized cost 668,642  
Due after 10 years, amortized cost 671,474  
Total fixed-maturity securities with single maturity dates, amortized cost 2,574,288  
Mortgage and asset-backed securities, amortized cost 1,037,672  
Available-for-sale debt securities, amortized cost basis 3,611,960 $ 3,378,618
Due in one year or less, fair value 352,282  
Due after one year through five years, fair value 857,487  
Due after five years through 10 years, fair value 649,308  
Due after 10 years, fair value 635,322  
Total fixed-maturity securities with single maturity dates, fair value 2,494,399  
Mortgage and asset-backed securities, fair value 977,283  
Total available-for-sale fixed-maturity securities $ 3,471,682