Segments Information - Segment Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue:
Revenue	$ 1,806,118	$ 1,724,988	$ 5,195,590	$ 4,895,510
Segment expenses:
Floor plan interest expense	$ 18,061	$ 22,372	$ 57,356	$ 78,053
Segment Reporting, Other Segment Item, Composition, Description	Other segment items include (i) intersegment operating expenses, which are eliminated in our condensed consolidated statements of operations, and (ii) other expense, net excluding loss and/or impairment on investments in equity securities	Other segment items include (i) intersegment operating expenses, which are eliminated in our condensed consolidated statements of operations, and (ii) other expense, net excluding loss and/or impairment on investments in equity securities	Other segment items include (i) intersegment operating expenses, which are eliminated in our condensed consolidated statements of operations, and (ii) other expense, net excluding loss and/or impairment on investments in equity securities	Other segment items include (i) intersegment operating expenses, which are eliminated in our condensed consolidated statements of operations, and (ii) other expense, net excluding loss and/or impairment on investments in equity securities
Operating Segments
Revenue:
Revenue	$ 1,809,783	$ 1,728,321	$ 5,206,811	$ 4,906,932
Segment expenses:
Segment Adjusted EBITDA	98,750	71,731	280,041	192,855
Intersegment Eliminations
Revenue:
Revenue	(3,665)	(3,333)	(11,221)	(11,422)
Good Sam Services and Plans
Revenue:
Revenue	52,508	50,841	152,929	149,070
Good Sam Services and Plans | Operating Segments
Revenue:
Revenue	52,672	50,639	153,989	150,027
Segment expenses:
Adjusted costs applicable to revenue	22,740	19,656	62,353	51,950
Adjusted selling, general and administrative	8,263	7,604	23,072	22,053
Segment Adjusted EBITDA	21,591	23,659	67,859	75,280
Good Sam Services and Plans | Intersegment Eliminations
Revenue:
Revenue	164	(202)	1,060	957
Segment expenses:
Adjusted costs applicable to revenue	78	(280)	705	744
Good Sam Services and Plans | Good Sam Services and Plans | Operating Segments
Revenue:
Revenue	52,508	50,841	152,929	149,070
RV and Outdoor Retail
Revenue:
Revenue	1,753,610	1,674,147	5,042,661	4,746,440
RV and Outdoor Retail | Operating Segments
Revenue:
Revenue	1,757,111	1,677,682	5,052,822	4,756,905
Segment expenses:
Adjusted costs applicable to revenue	1,266,227	1,206,713	3,593,978	3,394,704
Adjusted selling, general and administrative	392,346	397,649	1,179,591	1,158,009
Floor plan interest expense	18,061	22,372	57,356	78,053
Other segment items	(9)	80	(29)	223
Segment Adjusted EBITDA	77,159	48,072	212,182	117,575
RV and Outdoor Retail | Intersegment Eliminations
Revenue:
Revenue	3,501	3,535	10,161	10,465
Segment expenses:
Adjusted costs applicable to revenue	3,327	2,796	9,744	8,341
RV and Outdoor Retail | New vehicles
Revenue:
Revenue	766,779	824,916	2,303,317	2,328,107
RV and Outdoor Retail | New vehicles | Operating Segments
Revenue:
Revenue	766,779	824,916	2,303,317	2,328,107
RV and Outdoor Retail | Used vehicles
Revenue:
Revenue	589,092	447,242	1,583,714	1,265,701
RV and Outdoor Retail | Used vehicles | Operating Segments
Revenue:
Revenue	589,092	447,242	1,583,714	1,265,701
RV and Outdoor Retail | Products, service and other
Revenue:
Revenue	208,634	224,839	596,516	638,680
RV and Outdoor Retail | Products, service and other | Operating Segments
Revenue:
Revenue	208,634	224,839	596,516	638,680
RV and Outdoor Retail | Finance and insurance, net
Revenue:
Revenue	178,297	166,255	528,162	480,725
RV and Outdoor Retail | Finance and insurance, net | Operating Segments
Revenue:
Revenue	178,297	166,255	528,162	480,725
RV and Outdoor Retail | Good Sam Club
Revenue:
Revenue	10,808	10,895	30,952	33,227
RV and Outdoor Retail | Good Sam Club | Operating Segments
Revenue:
Revenue	$ 10,808	$ 10,895	$ 30,952	$ 33,227