v3.25.1
Segment Information - Additional Information (Detail) - Segment
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Segment Reporting Information [Line Items]    
Number of operating divisions 5  
Sales Revenue, Net [Member] | Segment Concentration Risk [Member] | Insurance Operation [Member]    
Segment Reporting Information [Line Items]    
Concentration risk, percentage 77.00% 85.10%
Sales Revenue, Net [Member] | Segment Concentration Risk [Member] | TypTap Group [Member]    
Segment Reporting Information [Line Items]    
Concentration risk, percentage 16.70% 12.70%
Assets [Member] | Segment Concentration Risk [Member] | Insurance Operation [Member]    
Segment Reporting Information [Line Items]    
Concentration risk, percentage 81.10% 83.60%
Assets [Member] | Segment Concentration Risk [Member] | Exzeo Group [Member]    
Segment Reporting Information [Line Items]    
Concentration risk, percentage 5.50% 3.70%