Summary of Significant Accounting Policies - Description of Business (Details)	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019 location	Sep. 30, 2019 location	Sep. 30, 2019 location segment	Sep. 30, 2019 location	Dec. 31, 2018 segment
Segments Information
Number of reportable segments | segment			2		3
Number of stores, beginning of period				227
Number of locations opened				18
Number of locations closed	3	7		23
Number of specialty retail locations divested				13
Closed/divested				(36)
Number of locations converted				10
Number of stores, end of period	209	209	209	209
RV and Outdoor Retail
Segments Information
Number of specialty retail locations divested		13
Co-habited RV and Outdoor Retail locations
Segments Information
Number of stores, beginning of period				120
Number of locations opened				11
Closed/divested				(3)
Number of locations converted				10
Number of stores, end of period	138	138	138	138
Stand-alone RV locations
Segments Information
Number of stores, beginning of period				15
Number of locations opened				5
Closed/divested				(5)
Number of stores, end of period	15	15	15	15
Stand-alone Outdoor Retail locations
Segments Information
Number of stores, beginning of period				70
Closed/divested				(11)
Number of locations converted				(10)
Number of stores, end of period	49	49	49	49
Stand-alone Specialty Retail locations
Segments Information
Number of stores, beginning of period				22
Number of locations opened				2
Closed/divested				(17)
Number of stores, end of period	7	7	7	7
CWH | CWGS, LLC
Segments Information
Ownership interest			42.00%		41.90%