Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segments Information
Revenue	$ 1,662,396	$ 1,557,781
Intersegment Eliminations
Segments Information
Revenue	(7,319)	(6,298)
Good Sam Services and Plans
Segments Information
Revenue	44,559	40,871
Good Sam Services and Plans | Intersegment Eliminations
Segments Information
Revenue	(270)	(41)
New vehicles
Segments Information
Revenue	834,959	821,976
New vehicles | Intersegment Eliminations
Segments Information
Revenue	(1,613)	(1,799)
Used vehicles
Segments Information
Revenue	403,032	294,257
Used vehicles | Intersegment Eliminations
Segments Information
Revenue	(786)	(772)
Products, service and other
Segments Information
Revenue	214,973	251,270
Products, service and other | Intersegment Eliminations
Segments Information
Revenue	(245)	(320)
Finance and insurance, net
Segments Information
Revenue	153,378	138,254
Finance and insurance, net | Intersegment Eliminations
Segments Information
Revenue	(4,405)	(3,366)
Good Sam Club
Segments Information
Revenue	11,495	11,153
Good Sam Services and Plans | Operating Segments
Segments Information
Revenue	44,829	40,912
Good Sam Services and Plans | Good Sam Services and Plans | Operating Segments
Segments Information
Revenue	44,829	40,912
RV and Outdoor Retail
Segments Information
Revenue	1,617,837	1,516,910
RV and Outdoor Retail | Operating Segments
Segments Information
Revenue	1,624,886	1,523,167
RV and Outdoor Retail | New vehicles
Segments Information
Revenue	834,959	821,976
RV and Outdoor Retail | New vehicles | Operating Segments
Segments Information
Revenue	836,572	823,775
RV and Outdoor Retail | Used vehicles
Segments Information
Revenue	403,032	294,257
RV and Outdoor Retail | Used vehicles | Operating Segments
Segments Information
Revenue	403,818	295,029
RV and Outdoor Retail | Products, service and other
Segments Information
Revenue	214,973	251,270
RV and Outdoor Retail | Products, service and other | Operating Segments
Segments Information
Revenue	215,218	251,590
RV and Outdoor Retail | Finance and insurance, net
Segments Information
Revenue	153,378	138,254
RV and Outdoor Retail | Finance and insurance, net | Operating Segments
Segments Information
Revenue	157,783	141,620
RV and Outdoor Retail | Good Sam Club
Segments Information
Revenue	11,495	11,153
RV and Outdoor Retail | Good Sam Club | Operating Segments
Segments Information
Revenue	$ 11,495	$ 11,153