Segments Information - Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Segments Information
Assets	$ 3,402,561	$ 3,376,240
Operating Segments
Segments Information
Assets	3,215,312	3,186,012
Corporate, Non-Segment
Segments Information
Assets	187,249	190,228
Good Sam Services and Plans | Operating Segments
Segments Information
Assets	102,087	138,360
RV and Outdoor Retail | Operating Segments
Segments Information
Assets	$ 3,113,225	$ 3,047,652