Segments Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segments Information
Revenue	$ 1,729,613	$ 1,855,682	$ 5,117,214	$ 5,686,710
Intersegment Eliminations
Segments Information
Revenue	(3,788)	(7,561)	(11,518)	(24,265)
Good Sam Services and Plans
Segments Information
Revenue	49,889	50,352	147,294	144,504
Good Sam Services and Plans | Intersegment Eliminations
Segments Information
Revenue	(133)	(61)	(823)	(410)
New vehicles
Segments Information
Revenue	679,207	834,112	2,126,862	2,746,323
New vehicles | Intersegment Eliminations
Segments Information
Revenue	(1,290)	(1,484)	(4,068)	(5,068)
Used vehicles
Segments Information
Revenue	590,227	525,988	1,657,935	1,484,978
Used vehicles | Intersegment Eliminations
Segments Information
Revenue	(1,267)	(1,090)	(3,537)	(3,100)
Products, service and other
Segments Information
Revenue	235,609	268,940	691,030	761,914
Products, service and other | Intersegment Eliminations
Segments Information
Revenue	(155)	(237)	(527)	(810)
Finance and insurance, net
Segments Information
Revenue	163,630	165,136	460,336	513,921
Finance and insurance, net | Intersegment Eliminations
Segments Information
Revenue	(943)	(4,689)	(2,563)	(14,877)
Good Sam Club
Segments Information
Revenue	11,051	11,154	33,757	35,070
Good Sam Services and Plans | Operating Segments
Segments Information
Revenue	50,022	50,413	148,117	144,914
Good Sam Services and Plans | Good Sam Services and Plans | Operating Segments
Segments Information
Revenue	50,022	50,413	148,117	144,914
RV and Outdoor Retail
Segments Information
Revenue	1,679,724	1,805,330	4,969,920	5,542,206
RV and Outdoor Retail | Operating Segments
Segments Information
Revenue	1,683,379	1,812,830	4,980,615	5,566,061
RV and Outdoor Retail | New vehicles
Segments Information
Revenue	679,207	834,112	2,126,862	2,746,323
RV and Outdoor Retail | New vehicles | Operating Segments
Segments Information
Revenue	680,497	835,596	2,130,930	2,751,391
RV and Outdoor Retail | Used vehicles
Segments Information
Revenue	590,227	525,988	1,657,935	1,484,978
RV and Outdoor Retail | Used vehicles | Operating Segments
Segments Information
Revenue	591,494	527,078	1,661,472	1,488,078
RV and Outdoor Retail | Products, service and other
Segments Information
Revenue	235,609	268,940	691,030	761,914
RV and Outdoor Retail | Products, service and other | Operating Segments
Segments Information
Revenue	235,764	269,177	691,557	762,724
RV and Outdoor Retail | Finance and insurance, net
Segments Information
Revenue	163,630	165,136	460,336	513,921
RV and Outdoor Retail | Finance and insurance, net | Operating Segments
Segments Information
Revenue	164,573	169,825	462,899	528,798
RV and Outdoor Retail | Good Sam Club
Segments Information
Revenue	11,051	11,154	33,757	35,070
RV and Outdoor Retail | Good Sam Club | Operating Segments
Segments Information
Revenue	$ 11,051	$ 11,154	$ 33,757	$ 35,070