v3.25.3
DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Disaggregation of Revenue [Line Items]        
Total revenue $ 281.0 $ 295.0 $ 825.6 $ 939.6
New retail vehicles        
Disaggregation of Revenue [Line Items]        
Total revenue 147.1 147.1 422.0 477.9
Pre-owned vehicles        
Disaggregation of Revenue [Line Items]        
Total revenue 53.5 52.7 160.8 160.8
Wholesale vehicles        
Disaggregation of Revenue [Line Items]        
Total revenue 3.7 6.6 12.5 17.5
Powersports vehicles        
Disaggregation of Revenue [Line Items]        
Total revenue 204.3 206.4 595.3 656.2
Parts, service and accessories        
Disaggregation of Revenue [Line Items]        
Total revenue 50.8 49.2 149.3 159.0
Finance and insurance, net        
Disaggregation of Revenue [Line Items]        
Total revenue 24.9 24.3 73.2 79.8
Vehicle transportation services        
Disaggregation of Revenue [Line Items]        
Total revenue 1.0 15.1 7.8 44.6
Point in time        
Disaggregation of Revenue [Line Items]        
Total revenue 260.9 260.8 760.8 827.5
Over time        
Disaggregation of Revenue [Line Items]        
Total revenue $ 20.1 $ 34.2 $ 64.8 $ 112.1