Segments Information - Segment Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segments Information
Total segment income	$ 203,340	$ 90,304	$ 216,605	$ 107,186
Selling, general, and administrative expense	(271,591)	(303,366)	(539,247)	(571,431)
Depreciation and amortization	(12,567)	(13,946)	(26,645)	(27,540)
Other interest expense, net	(14,547)	(18,211)	(29,205)	(35,854)
Tax Receivable Agreement liability adjustment				8,477
Income before income taxes	183,695	60,824	173,698	56,930
Operating Segments
Segments Information
Total segment income	212,974	96,895	234,442	118,934
Other interest expense, net	(2,082)	(2,264)	(3,974)	(4,412)
Corporate, Non-Segment
Segments Information
Selling, general, and administrative expense	(2,165)	(3,914)	(4,894)	(7,087)
Other interest expense, net	(12,465)	(15,947)	(25,231)	(31,442)
Good Sam Services and Plans | Operating Segments
Segments Information
Total segment income	24,591	21,208	45,931	43,622
Depreciation and amortization	(768)	(836)	(1,524)	(1,688)
Other interest expense, net		1		1
RV and Outdoor Retail | Operating Segments
Segments Information
Total segment income	188,383	75,687	188,511	75,312
Depreciation and amortization	(11,799)	(13,110)	(25,121)	(25,852)
Other interest expense, net	$ (2,082)	$ (2,265)	$ (3,974)	$ (4,413)