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Loss And Loss Adjustment Expense Reserves - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Unusual or Infrequent Item, or Both [Line Items]      
Prior year claims and claims adjustment expense $ 24,787 $ (35,948) $ 47,281
Liability for catastrophe claims, carrying amount 277,000 239,000 102,000
Catastrophe      
Unusual or Infrequent Item, or Both [Line Items]      
Adjustments for prior year claims 9,000 (8,000) 1,000
Liability for catastrophe claims, carrying amount 268,000 $ 247,000 $ 101,000
Property insurance product line, automobile      
Unusual or Infrequent Item, or Both [Line Items]      
Adjustments for prior year claims 13,000    
Property insurance product line, homeowners'      
Unusual or Infrequent Item, or Both [Line Items]      
Adjustments for prior year claims (5,000)    
Property insurance product line, commercial property      
Unusual or Infrequent Item, or Both [Line Items]      
Adjustments for prior year claims 15,000    
Other Short-duration Insurance Product Line      
Unusual or Infrequent Item, or Both [Line Items]      
Adjustments for prior year claims $ 2,000