Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segments Information
Revenue	$ 2,168,632	$ 2,061,807	$ 3,831,028	$ 3,619,588
Intersegment Eliminations
Segments Information
Revenue	(9,385)	(8,530)	(16,704)	(14,828)
Good Sam Services and Plans
Segments Information
Revenue	49,593	46,902	94,152	87,773
Good Sam Services and Plans | Intersegment Eliminations
Segments Information
Revenue	(79)	(53)	(349)	(94)
New vehicles
Segments Information
Revenue	1,077,252	1,058,778	1,912,211	1,880,754
New vehicles | Intersegment Eliminations
Segments Information
Revenue	(1,971)	(2,204)	(3,584)	(4,003)
Used vehicles
Segments Information
Revenue	555,958	460,137	958,990	754,394
Used vehicles | Intersegment Eliminations
Segments Information
Revenue	(1,224)	(1,080)	(2,010)	(1,852)
Products, service and other
Segments Information
Revenue	278,001	305,554	492,974	556,824
Products, service and other | Intersegment Eliminations
Segments Information
Revenue	(328)	(573)	(573)	(893)
Finance and insurance, net
Segments Information
Revenue	195,407	177,685	348,785	315,939
Finance and insurance, net | Intersegment Eliminations
Segments Information
Revenue	(5,783)	(4,620)	(10,188)	(7,986)
Good Sam Club
Segments Information
Revenue	12,421	12,751	23,916	23,904
Good Sam Services and Plans | Operating Segments
Segments Information
Revenue	49,672	46,955	94,501	87,867
Good Sam Services and Plans | Good Sam Services and Plans | Operating Segments
Segments Information
Revenue	49,672	46,955	94,501	87,867
RV and Outdoor Retail
Segments Information
Revenue	2,119,039	2,014,905	3,736,876	3,531,815
RV and Outdoor Retail | Operating Segments
Segments Information
Revenue	2,128,345	2,023,382	3,753,231	3,546,549
RV and Outdoor Retail | New vehicles
Segments Information
Revenue	1,077,252	1,058,778	1,912,211	1,880,754
RV and Outdoor Retail | New vehicles | Operating Segments
Segments Information
Revenue	1,079,223	1,060,982	1,915,795	1,884,757
RV and Outdoor Retail | Used vehicles
Segments Information
Revenue	555,958	460,137	958,990	754,394
RV and Outdoor Retail | Used vehicles | Operating Segments
Segments Information
Revenue	557,182	461,217	961,000	756,246
RV and Outdoor Retail | Products, service and other
Segments Information
Revenue	278,001	305,554	492,974	556,824
RV and Outdoor Retail | Products, service and other | Operating Segments
Segments Information
Revenue	278,329	306,127	493,547	557,717
RV and Outdoor Retail | Finance and insurance, net
Segments Information
Revenue	195,407	177,685	348,785	315,939
RV and Outdoor Retail | Finance and insurance, net | Operating Segments
Segments Information
Revenue	201,190	182,305	358,973	323,925
RV and Outdoor Retail | Good Sam Club
Segments Information
Revenue	12,421	12,751	23,916	23,904
RV and Outdoor Retail | Good Sam Club | Operating Segments
Segments Information
Revenue	$ 12,421	$ 12,751	$ 23,916	$ 23,904