Segments Information - Segment Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segments Information
Total segment income	$ (32,307)	$ 80,662	$ 74,879	$ 244,038
Selling, general, and administrative expense	(299,564)	(278,330)	(870,995)	(807,738)
Depreciation and amortization	(14,104)	(13,179)	(41,644)	(34,207)
Other interest expense, net	(17,568)	(16,794)	(53,422)	(45,740)
Tax Receivable Agreement liability adjustment			8,477
Loss and expense on debt restructure				(2,056)
Other expense, net		2
(Loss) income before income taxes	(58,880)	56,055	(1,950)	167,862
Operating Segments
Segments Information
Total segment income	(24,553)	87,633	94,381	254,435
Depreciation and amortization	(14,104)	(12,984)	(41,644)	(34,012)
Other interest expense, net	(2,450)	(1,362)	(6,862)	(4,183)
Corporate & other
Segments Information
Selling, general, and administrative expense	(2,655)	(1,607)	(9,742)	(4,570)
Depreciation and amortization		(195)		(195)
Other interest expense, net	(15,118)	(15,432)	(46,560)	(41,557)
Good Sam services and plans | Operating Segments
Segments Information
Total segment income	18,247	18,701	61,869	61,139
Depreciation and amortization	(810)	(952)	(2,498)	(2,457)
Other interest expense, net		(1)	1	1
RV and Outdoor Retail | Operating Segments
Segments Information
Total segment income	(42,800)	68,932	32,512	193,296
Depreciation and amortization	(13,294)	(12,032)	(39,146)	(31,555)
Other interest expense, net	$ (2,450)	$ (1,361)	$ (6,863)	$ (4,184)