v3.26.1
Fair Value Option (Gains And Losses Due To Changes In Fair Value Of Investments) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]    
Losses due to changes in fair value of investments $ (17,919) $ (8,875)
Investments    
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]    
Losses due to changes in fair value of investments (17,851) (9,358)
Fixed maturity securities    
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]    
Losses due to changes in fair value of investments (15,476) 17,407
Equity securities    
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]    
Losses due to changes in fair value of investments (2,392) (26,762)
Short-term investments    
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]    
Losses due to changes in fair value of investments 17 (3)
Notes receivable    
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]    
Losses due to changes in fair value of investments $ (68) $ 483