v3.26.1
Geographical Breakdown of Gross Written Premium (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Gross Written Premium [Line Items]    
Amount $ 332.4 $ 210.9
Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 100.00% 100.00%
California    
Gross Written Premium [Line Items]    
Amount $ 66.0 $ 46.0
California | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 19.90% 21.80%
New York    
Gross Written Premium [Line Items]    
Amount $ 44.2 $ 12.2
New York | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 13.30% 5.80%
Florida    
Gross Written Premium [Line Items]    
Amount $ 42.9 $ 32.0
Florida | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 12.90% 15.20%
Texas    
Gross Written Premium [Line Items]    
Amount $ 36.2 $ 26.0
Texas | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 10.90% 12.30%
Illinois    
Gross Written Premium [Line Items]    
Amount $ 12.9 $ 6.0
Illinois | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 3.80% 2.80%
Georgia    
Gross Written Premium [Line Items]    
Amount $ 9.7 $ 5.6
Georgia | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 2.90% 2.70%
Ohio    
Gross Written Premium [Line Items]    
Amount $ 7.2 $ 4.6
Ohio | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 2.20% 2.20%
Colorado    
Gross Written Premium [Line Items]    
Amount $ 7.0 $ 4.5
Colorado | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 2.10% 2.10%
New Jersey    
Gross Written Premium [Line Items]    
Amount $ 6.6 $ 4.2
New Jersey | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 2.00% 2.00%
Arizona    
Gross Written Premium [Line Items]    
Amount $ 6.5 $ 4.3
Arizona | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 2.00% 2.00%
Other    
Gross Written Premium [Line Items]    
Amount $ 93.2 $ 65.5
Other | Geographic Concentration Risk | Gross written premium    
Gross Written Premium [Line Items]    
Concentration risk, percentage (as a percent) 28.00% 31.10%