Summary of Significant Accounting Policies - Description of Business (Details)	6 Months Ended
	Jun. 30, 2017 segment store	Jun. 30, 2017 item store
Segments Information
Number of primary businesses	2	2
Number of locations related to RV purchasers and outdoor enthusiasts	137	137
Number of locations related to marine and watersports products	2	2
New and used RVs, financing, and other ancillary services, protection plans, and products for the RV purchaser
Segments Information
Number of locations related to RV purchasers and outdoor enthusiasts	120	120
CWGS, LLC
Segments Information
Ownership interest	32.90%	32.90%