Segments Information - Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Segments Information
Assets	$ 3,264,551	$ 3,376,240
Operating Segments
Segments Information
Assets	3,058,576	3,186,012
Corporate, Non-Segment
Segments Information
Assets	205,975	190,228
Good Sam Services and Plans | Operating Segments
Segments Information
Assets	143,917	138,360
RV and Outdoor Retail | Operating Segments
Segments Information
Assets	$ 2,914,659	$ 3,047,652