Segments Information - Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Segments Information
Assets	$ 3,662,423	$ 2,806,687
Operating Segments
Segments Information
Assets	3,500,644	2,613,531
Corporate & other
Segments Information
Assets	161,779	193,156
Good Sam services and plans | Operating Segments
Segments Information
Assets	93,215	174,623
RV and Outdoor Retail | Operating Segments
Segments Information
Assets	$ 3,407,429	$ 2,438,908