Segment Information - Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segments Information
Revenue	$ 6,967,013	$ 6,913,754	$ 5,446,591
Intersegment Eliminations
Segments Information
Revenue	(28,887)	(26,466)	(21,594)
Good Sam Services and Plans
Segments Information
Revenue	192,128	180,722	180,977
Good Sam Services and Plans | Intersegment Eliminations
Segments Information
Revenue	(494)	(204)	(1,781)
New vehicles
Segments Information
Revenue	3,228,077	3,299,454	2,823,311
New vehicles | Intersegment Eliminations
Segments Information
Revenue	(5,939)	(6,548)	(5,985)
Used vehicles
Segments Information
Revenue	1,877,601	1,686,217	984,853
Used vehicles | Intersegment Eliminations
Segments Information
Revenue	(3,867)	(3,638)	(2,536)
Products, service and other
Segments Information
Revenue	999,214	1,100,942	948,890
Products, service and other | Intersegment Eliminations
Segments Information
Revenue	(956)	(1,465)	(1,357)
Finance and insurance, net
Segments Information
Revenue	623,456	598,475	464,261
Finance and insurance, net | Intersegment Eliminations
Segments Information
Revenue	(17,631)	(14,611)	(9,935)
Good Sam Club
Segments Information
Revenue	46,537	47,944	44,299
Good Sam Services and Plans | Operating Segments
Segments Information
Revenue	192,622	180,926	182,758
Good Sam Services and Plans | Good Sam Services and Plans | Operating Segments
Segments Information
Revenue	192,622	180,926	182,758
RV and Outdoor Retail
Segments Information
Revenue	6,774,885	6,733,032	5,265,614
RV and Outdoor Retail | Operating Segments
Segments Information
Revenue	6,803,278	6,759,294	5,285,427
RV and Outdoor Retail | New vehicles
Segments Information
Revenue	3,228,077	3,299,454	2,823,311
RV and Outdoor Retail | New vehicles | Operating Segments
Segments Information
Revenue	3,234,016	3,306,002	2,829,296
RV and Outdoor Retail | Used vehicles
Segments Information
Revenue	1,877,601	1,686,217	984,853
RV and Outdoor Retail | Used vehicles | Operating Segments
Segments Information
Revenue	1,881,468	1,689,855	987,389
RV and Outdoor Retail | Products, service and other
Segments Information
Revenue	999,214	1,100,942	948,890
RV and Outdoor Retail | Products, service and other | Operating Segments
Segments Information
Revenue	1,000,170	1,102,407	950,247
RV and Outdoor Retail | Finance and insurance, net
Segments Information
Revenue	623,456	598,475	464,261
RV and Outdoor Retail | Finance and insurance, net | Operating Segments
Segments Information
Revenue	641,087	613,086	474,196
RV and Outdoor Retail | Good Sam Club
Segments Information
Revenue	46,537	47,944	44,299
RV and Outdoor Retail | Good Sam Club | Operating Segments
Segments Information
Revenue	$ 46,537	$ 47,944	$ 44,299