Goodwill and Intangible Assets - Change in Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2023
Goodwill
Balance (excluding impairment charges)				$ 953,059
Accumulated impairment charges				(241,837)
Balance	$ 732,813	$ 734,023	$ 711,222
Acquisitions	1,210	18,341	30,490
Divestiture		(3,413)	(8,899)
Balance	734,023	748,951	732,813
Good Sam Services and Plans
Goodwill
Balance (excluding impairment charges)				71,118
Accumulated impairment charges				(46,884)
Balance	25,795	25,795	24,234
Acquisitions			1,561
Balance	25,795	25,795	25,795
RV and Outdoor Retail
Goodwill
Balance (excluding impairment charges)				881,941
Accumulated impairment charges				$ (194,953)
Balance	707,018	708,228	686,988
Acquisitions	1,210	18,341	28,929
Divestiture		(3,413)	(8,899)
Balance	$ 708,228	$ 723,156	$ 707,018