v3.25.2
Investments (Schedule Of Amortized Cost And Estimated Fair Value Of Fixed Maturity Securities By Contractual Maturity Date) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Due in one year or less, amortized cost $ 1,899,807  
Due after one year through five years, amortized cost 6,347,802  
Due after five years through ten years, amortized cost 4,723,348  
Due after ten years, amortized cost 1,169,517  
Amortized cost, sub-total 14,140,474  
Total fixed maturity securities, amortized cost 16,959,574  
Due in one year or less, estimated fair value 1,900,181  
Due after one year through five years, estimated fair value 6,376,686  
Due after five years through ten years, estimated fair value 4,674,790  
Due after ten years, estimated fair value 1,063,133  
Estimated fair value, sub-total 14,014,790  
Total fixed maturity securities, estimated fair value 16,772,408 $ 15,745,539
Mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Fixed maturity securities, amortized cost 2,819,100  
Fixed maturity securities, estimated fair value $ 2,757,618