Represents the number of specialty retail locations that has goodwill allocated to them.

No definition available.

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

- Definition

Represents the number of store divested.

+ References

No definition available.

+ Details

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Namespace Prefix:	cwh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 20
-Section 50
-Paragraph 1
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+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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+ Details

Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_GoodwillRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of transfers into (out of) an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillTransfers
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 20
-Section 50
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cwh_GoodSamServicesAndPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReportingUnitAxis=cwh_GssEnterprisesLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cwh_RvAndOutdoorRetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ReportingUnitAxis=cwh_CwiIncMember
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Period Type:

Goodwill and Intangible Assets - Change in Goodwill (Details) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 01, 2019 USD ($)	Sep. 30, 2019 USD ($) location	Sep. 30, 2019 USD ($) location	Sep. 30, 2019 USD ($) location
Goodwill
Balance	$ 359,117		$ 359,117
Acquisitions			28,198
Divestures			(400)
Balance		$ 386,915	386,915	$ 386,915
Number of specialty retail locations divested \| location				13
Goodwill impairment		0
Good Sam services and plans
Goodwill
Balance	50,320		50,320
Transfers of assets between reporting units			(26,491)
Balance		23,829	23,829	$ 23,829
Good Sam services and plans \| GSS
Goodwill
Transfers of assets between reporting units	(26,500)
RV and Outdoor Retail
Goodwill
Balance	308,797		308,797
Acquisitions			28,198
Transfers of assets between reporting units			26,491
Divestures			(400)
Balance		$ 363,086	$ 363,086	$ 363,086
Number of specialty retail locations with goodwill \| location		13	13	13
Number of specialty retail locations divested \| location		13
RV and Outdoor Retail \| CWI
Goodwill
Transfers of assets between reporting units	$ 26,500