Represents the number of stores closed.

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- Definition

Represents the number of stores converted.

+ References

No definition available.

+ Details

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- Definition

The number of stores rebranded to Gander Outdoors.

+ References

No definition available.

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- Definition

Represents the number of stores related to marine and water sports enthusiasts.

+ References

No definition available.

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- Definition

Represents the number of stores related to outdoor gear and apparel.

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No definition available.

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- Definition

Represents the number of stores related to outdoor gear for kayaking, rock climbing, camping and hiking.

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No definition available.

+ Details

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- Definition

Represents the number of stores related to outdoor products and services.

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No definition available.

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Data Type:	xbrli:integerItemType
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- Definition

Represents the number of stores related to RV products, parts and services.

+ References

No definition available.

+ Details

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Namespace Prefix:	cwh_
Data Type:	xbrli:integerItemType
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- Definition

Represents the number of stores related to RV purchasers and outdoor enthusiasts.

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No definition available.

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Data Type:	xbrli:integerItemType
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Period Type:	instant

- Definition

Represents the number of stores related to skiing, snowboarding, and skateboarding products.

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No definition available.

+ Details

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Namespace Prefix:	cwh_
Data Type:	xbrli:integerItemType
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Period Type:	instant

- Definition

Represents the number of stores related to skiing, snowboarding, bicycling and skateboarding products.

+ References

No definition available.

+ Details

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Namespace Prefix:	cwh_
Data Type:	xbrli:integerItemType
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- References

No definition available.

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Period Type:	duration

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

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Data Type:	num:percentItemType
Balance Type:	na
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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

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Represents the number of stores.

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No definition available.

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Balance Type:	na
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- References

No definition available.

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Namespace Prefix:	us-gaap_
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Period Type:	duration

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Summary of Significant Accounting Policies - Description of Business (Details) $ in Thousands			3 Months Ended	6 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2018	Oct. 06, 2016	Sep. 30, 2018 store segment	Jun. 30, 2018 segment	Sep. 30, 2018 USD ($) store	Sep. 30, 2017 USD ($)	Dec. 31, 2017	Apr. 19, 2018 store	Jan. 30, 2018 store	May 26, 2017 store	May 25, 2017 store
Segments Information
Number of reportable segments \| segment			3	2
Number of Camping World retail locations			227		227
Number of stores related to RV products, parts and services			129		129
Cash flow statements
Net cash provided by operating activities \| $					$ 251,058	$ 173,352
Net cash used in investing activities \| $					$ (286,784)	(401,325)
Adjustment
Cash flow statements
Net cash provided by operating activities \| $						(3,800)
Net cash used in investing activities \| $						$ (3,800)
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			136		136
Retail
Segments Information
Number of stores closed					2
Gander Mountain
Segments Information
Number of stores closed					1
Number of Camping World retail locations											160
Number of Gander Outdoors stores			61		61
Gander Mountain \| Outdoor Products and Services
Segments Information
Number of Gander Outdoors stores			55		55
Gander Mountain \| Retail
Segments Information
Number of stores converted					3
TheHouse.com
Segments Information
Number of locations related to skiing, snowboarding, bicycling and skateboarding products			2		2
W82
Segments Information
Number of stores related to skiing, snowboarding, and skateboarding products			2		2
Uncle Dan's
Segments Information
Number of locations related to outdoor products and services			6		6
Overton's
Segments Information
Number of stores closed					2
Number of Camping World retail locations										2
Number of locations related to marine and water sports products			1		1
Number of stores converted					1
Erehwon
Segments Information
Number of locations related to outdoor gear and apparel									4
Rock Creek
Segments Information
Number of stores related to outdoor gear for kayaking, rock climbing, camping and hiking.								7
CWH \| CWGS, LLC
Segments Information
Ownership interest	41.80%	22.60%			41.80%		41.50%