Acquisitions - Assets (Liabilities) Acquired (Assumed) at Fair Value (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Tangible assets (liabilities) acquired (assumed):
Goodwill	$ 688,139	$ 533,217	$ 622,423	$ 483,634
Cash paid for acquisitions, net of cash acquired	150,475	83,227
RV and Outdoor Retail
Tangible assets (liabilities) acquired (assumed):
Goodwill	663,905	508,983	598,189	459,805
RV and Outdoor Retail | 2023 Acquisitions
Tangible assets (liabilities) acquired (assumed):
Accounts receivable, net	0
Inventories, net	83,939
Prepaid expenses and other assets	163
Property and equipment, net	1,147
Operating lease assets	916
Customer deposits	0
Accrued liabilities	(6)
Current portion of operating lease liabilities	(208)
Other current liabilities	(484)
Operating lease liabilities, net of current portion	(708)
Total tangible net assets acquired	84,759
Total intangible assets acquired	0
Goodwill	65,716
Cash paid for acquisitions, net of cash acquired	150,475
Inventory purchases financed via floor plan	(70,568)
Cash payment net of floor plan financing	79,907
RV and Outdoor Retail | 2022 Acquisitions
Tangible assets (liabilities) acquired (assumed):
Accounts receivable, net		(68)
Inventories, net		30,828
Prepaid expenses and other assets		48
Property and equipment, net		206
Operating lease assets		739
Customer deposits		(77)
Accrued liabilities		75
Current portion of operating lease liabilities		(235)
Other current liabilities		0
Operating lease liabilities, net of current portion		(504)
Total tangible net assets acquired		31,012
Total intangible assets acquired		2,632
Goodwill		49,583
Cash paid for acquisitions, net of cash acquired		83,227
Inventory purchases financed via floor plan		(19,971)
Cash payment net of floor plan financing		63,256
Good Sam Services and Plans
Tangible assets (liabilities) acquired (assumed):
Goodwill	$ 24,234	$ 24,234	$ 24,234	$ 23,829