Long-Term Debt - Senior Secured Credit Facilities (Details) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2020 USD ($) property	Dec. 31, 2019 USD ($)
Finance Lease Liabilities
Number of real estate parcels under finance leases \| property	2
Term Loan Facility
Long-Term Debt
Maximum borrowing capacity	$ 1,190,000	$ 1,190,000
Unamortized discount	3,800	4,300
Secured Debt \| Term Loan Facility
Long-Term Debt
Unamortized discount	$ 3,790	$ 4,320
Secured Debt \| Line of Credit \| Term Loan Facility
Long-Term Debt
Debt Instrument, Prepayment Requirement, Percentage of Excess Cash Flow	50.00%
Principal payment frequency	quarterly	quarterly
Quarterly amortization payment	$ 3,000	$ 3,000
Voluntary principal payment	9,600
Secured Debt \| Revolving loans \| New Senior Secured Credit Facility Revolving Credit Facility
Long-Term Debt
Maximum borrowing capacity	35,000	35,000
Secured Debt \| Letters of credit \| New Senior Secured Credit Facility Revolving Credit Facility
Long-Term Debt
Debt Instrument, Maximum Amount Allocated to Letters of Credit	$ 15,000	$ 15,000

Maximum amount allocated to letters of credit on a debt instrument.

No definition available.

Name:	cwh_DebtInstrumentMaximumAmountAllocatedToLettersOfCredit
Namespace Prefix:	cwh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Prepayment requirement as a percentage of excess cash flow on a debt instrument.

+ References

No definition available.

+ Details

Name:	cwh_DebtInstrumentPrepaymentRequirementPercentageOfExcessCashFlow
Namespace Prefix:	cwh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

n/a

+ References

No definition available.

+ Details

Name:	cwh_FinanceLeaseLiabilityAbstract
Namespace Prefix:	cwh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of real estate parcels that are associated with finance leases.

+ References

No definition available.

+ Details

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

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

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

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=cwh_NewSeniorSecuredCreditFacilityTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cwh_NewSeniorSecuredCreditFacilityRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: