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Loss And Loss Adjustment Expense Reserves (Schedule Of Losses And Loss Adjustment Expenses) (Details) - Fire - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Net losses and loss adjustment expenses on Eaton and Palisades fires, As Of March 31, 2026 and December 31, 2025    
Gross losses and loss adjustment expenses $ 2,285,227 $ 2,191,752
Subrogation recovered and recoverable - Eaton fire (558,887) (537,506)
Subrogation recovered and recoverable - Palisades fire (50,204) (48,026)
Reinsurance recovered and recoverable (1,293,500) (1,293,500)
Net catastrophe losses and loss adjustment expenses on Eaton and Palisades fires before FAIR Plan 382,636 312,720
Company's share of FAIR Plan losses and loss adjustment expenses 91,296 92,717
Recoupable portion of FAIR Plan losses and loss adjustment expenses (25,000) (25,000)
Net FAIR Plan losses and loss adjustment expenses 66,296 67,717
Net losses and loss adjustment expenses on Eaton and Palisades fires 448,932 $ 380,437
Net losses and loss adjustment expenses on Eaton and Palisades fires, For the Three Months Ended March 31, 2026    
Gross losses and loss adjustment expenses 93,475  
Subrogation recoverable - Eaton fire 21,381  
Subrogation recovered and recoverable - Palisades fire (2,178)  
Reinsurance recovered and recoverable 0  
Net catastrophe losses and loss adjustment expenses on Eaton and Palisades fires before FAIR Plan 69,916  
Company's share of FAIR Plan losses and loss adjustment expenses (1,421)  
Recoupable portion of FAIR Plan losses and loss adjustment expenses 0  
Net FAIR Plan losses and loss adjustment expenses (1,421)  
Net losses and loss adjustment expenses on Eaton and Palisades fires $ 68,495