v3.25.1
Equity (Noncontrolling Interest) - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Class of Stock [Line Items]      
Common stock, outstanding 10,765,336   10,767,184
Purchase of noncontrolling interests $ 0 $ (33)  
Common Stock      
Class of Stock [Line Items]      
Repurchase and retirement of common stock, shares 5,267 5,656  
Exzeo Group [Member]      
Class of Stock [Line Items]      
Common stock, outstanding 82,709,589    
Common stock shares outstanding not owned by entity 7,709,589    
Repurchase and retirement of common stock, shares   22,787  
Purchase of noncontrolling interests   $ 33