v3.26.1
Segment Information - Summary of Segment Assets Reconciled to Consolidated Balance Sheet (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Segment Reporting Information [Line Items]    
Total assets $ 2,611,081 $ 2,528,928
Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Total assets 2,611,081 2,528,928
Consolidation, Eliminations [Member]    
Segment Reporting Information [Line Items]    
Total assets (140,287) (149,997)
Insurance Operation [Member] | Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Total assets 1,890,443 1,895,081
Exzeo Group Inc | Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Total assets 379,768 347,734
Reciprocal Exchange Operation [Member] | Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Total assets 198,263 184,453
Real Estate Operations [Member] | Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Total assets 137,223 130,971
Corporate and Other [Member] | Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Total assets $ 145,671 $ 120,686