DESCRIPTION OF BUSINESS (Details)	Jun. 30, 2017 store VehicleBrands MetropolitanMarkets states DealershipLocations CollisionRepairCenters Franchises
Business Organization [Line Items]
Number of franchises (in franchises) | Franchises	96
Number of dealership locations (in dealership locations) | DealershipLocations	80
Number of metropolitan markets (in metropolitan markets) | MetropolitanMarkets	17
Number of states (in states) | states	9
Number of vehicle brands (in vehicle brands) | VehicleBrands	29
Number of collision repair centers (in collision repair centers) | CollisionRepairCenters	24
Florida
Business Organization [Line Items]
Number of stores (in stores) | store	2
Mid-line Import Brands
Business Organization [Line Items]
Weighted brand mix (percent)	46.00%
Luxury Brands
Business Organization [Line Items]
Weighted brand mix (percent)	33.00%
Domestic Brands
Business Organization [Line Items]
Weighted brand mix (percent)	21.00%