Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Receivables
Gross receivables	$ 86,815	$ 85,384
Allowance for doubtful accounts	(3,393)	(3,537)	$ (4,481)
Receivables, net	83,422	81,847
Good Sam Services and Plans
Receivables
Gross receivables	11,837	20,195
RV and Outdoor Retail | Trade accounts receivable
Receivables
Gross receivables	16,289	15,715
RV and Outdoor Retail | Due from manufacturers
Receivables
Gross receivables	17,778	17,642
RV and Outdoor Retail | New and used vehicles
Receivables
Gross receivables	6,836	2,295
RV and Outdoor Retail | Parts, services and other
Receivables
Gross receivables	26,437	23,199
RV and Outdoor Retail | Other
Receivables
Gross receivables	7,611	5,782
Corporate
Receivables
Gross receivables	$ 27	$ 556