FLOOR PLAN NOTES PAYABLE - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Floor Plan Notes Payable [Line Items]
Debt instrument, conversion, maximum convertible amount, amount subtracted from contractual total	$ 50.0
Loaner Vehicle Notes Payable - Bank of America
Floor Plan Notes Payable [Line Items]
Notes payable	128.8	$ 127.2
Loaner Vehicle Floorplan Facility
Floor Plan Notes Payable [Line Items]
Notes payable	$ 96.3	$ 111.9