Summary of Significant Accounting Policies - Description of Business (Details) $ in Thousands	3 Months Ended						12 Months Ended
	Dec. 31, 2020 USD ($) location	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) location	Dec. 31, 2019 USD ($) location	Sep. 30, 2019 USD ($)	Dec. 31, 2020 USD ($) location segment	Dec. 31, 2019 USD ($) location segment	Dec. 31, 2018	May 31, 2020 USD ($)
Segments Information
Number of reportable segments | segment							2	2
Number of stores	171			175	175		171	175
Number of stores, beginning of period				175			175
Number of locations opened							9
Closed/divested							(11)
Temporarily closed							(2)
Number of stores, end of period	171				175		171	175
Liquidation of inventory | $	$ 6,300	$ 4,600	$ 3,700	$ 3,000	$ 19,500	$ 27,700
Lease payment deferrals | $										$ 14,000
RV Dealerships
Segments Information
Number of stores	160			154	154		160	154
Number of stores, beginning of period				154			154
Number of locations opened							9
Closed/divested							(3)
Temporarily closed							(2)
Number of locations converted							2
Number of stores, end of period	160				154		160	154
RV Service And Retail Centers
Segments Information
Number of stores	10			11	11		10	11
Number of stores, beginning of period				11			11
Number of locations converted							(1)
Number of stores, end of period	10				11		10	11
Other Retail Stores
Segments Information
Number of stores	1			10	10		1	10
Number of stores, beginning of period				10			10
Closed/divested							(8)
Number of locations converted							(1)
Number of stores, end of period	1				10		1	10
CWH | CWGS, LLC
Segments Information
Ownership interest							47.40%	42.00%	41.90%
2019 Strategic Shift
Segments Information
Liquidation of inventory | $							$ 22,041	$ 47,278
2019 Strategic Shift | Non RV Retail Stores
Segments Information
Closed/divested								34
2019 Strategic Shift | Incremental inventory reserve charges | Non RV Retail Stores
Segments Information
Liquidation of inventory | $								$ 108,000