Segments Information - Other Interest Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segments Information
Other interest expense, net	$ 17,643	$ 12,839
Operating Segments
Segments Information
Other interest expense, net	2,148	1,818
Corporate & other
Segments Information
Other interest expense, net	15,495	11,021
Good Sam services and plans | Operating Segments
Segments Information
Other interest expense, net		(1)
RV and Outdoor Retail | Operating Segments
Segments Information
Other interest expense, net	$ 2,148	$ 1,819