v3.26.1
Equity (Noncontrolling Interest) - Additional Information (Detail) - shares
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Class of Stock [Line Items]      
Common stock, outstanding 12,900,905   12,992,147
Common Stock [Member]      
Class of Stock [Line Items]      
Repurchase and retirement of common stock, shares 478 5,267  
Exzeo Group Inc [Member]      
Class of Stock [Line Items]      
Common stock, outstanding 90,918,430    
Common stock shares outstanding owned by consolidating entity 75,000,000    
HCI Unvested Restricted Stock Awards 2,533,303