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Reinsurance (Additional Information) (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
May 31, 2026
USD ($)
Nov. 01, 2025
USD ($)
May 31, 2025
USD ($)
Jun. 01, 2025
USD ($)
Dec. 31, 2024
USD ($)
Oct. 29, 2024
USD ($)
Jun. 01, 2024
USD ($)
Effects of Reinsurance [Line Items]                
Retaining on Property Business   $ 700 $ 1,000 $ 700        
Loss on Property Risk Ceding   $ 4,300 $ 9,000 $ 4,300        
Percentage of Treaties Cover   100.00% 100.00% 100.00%        
Reinsurance Contract Coverage Amount         $ 7,000   $ 50,000 $ 7,000
The Reinsurer Total Liability Capped         14,000     14,000
Effective Period of Treaties   May 31, 2026 Nov. 01, 2025 May 31, 2025        
Estimated Premium Coverage Amount $ 0     $ 71,345   $ 10,284    
Florida Hurricane Catastrophe Fund (FHCF)                
Effects of Reinsurance [Line Items]                
Percentage of Loss From Catastrophe   0.90   0.90        
Loss From Catastrophe   $ 991,900   $ 791,700        
Estimated Premium Coverage Amount       60,077        
Maximum Payout Amount $ 892,700     $ 712,500        
Catastrophe | Florida Hurricane Catastrophe Fund (FHCF)                
Effects of Reinsurance [Line Items]                
Percentage of Loss From Catastrophe 0.90     0.90        
Maximum | Florida Hurricane Catastrophe Fund (FHCF)                
Effects of Reinsurance [Line Items]                
Percenatge of Maximum Coverage Limit 90.00%     90.00%        
Minimum                
Effects of Reinsurance [Line Items]                
Reinsurance Contract Coverage Amount         $ 5,000   $ 10,000 $ 5,000
Minimum | Florida Hurricane Catastrophe Fund (FHCF)                
Effects of Reinsurance [Line Items]                
Loss From Catastrophe $ 557,200     $ 379,300        
Maximum Payout Amount $ 557,200     $ 379,300        
Minimum | Catastrophe | Florida Hurricane Catastrophe Fund (FHCF)                
Effects of Reinsurance [Line Items]                
Percentage of Loss From Catastrophe 0.10     0.10