The alternate base rate of the debt instrument.

No definition available.

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

- Definition

Excess cash flow presented to debt holders for determining prepayment on a debt instrument.

+ References

No definition available.

+ Details

Name:	cwh_DebtInstrumentPrepaymentRequirementExcessCashFlowPresentedToDebtHolders
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

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

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

The leverage ratio for the reduced repayment requirement as a percentage of excess cash flow on a debt instrument.

+ References

No definition available.

+ Details

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

- Definition

The floor of the variable rate basis on the debt instrument.

+ References

No definition available.

+ Details

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

- Definition

The reduction in the basis spread on variable rate.

+ References

No definition available.

+ Details

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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Period Type:

- Details

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- Details

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- Details

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Balance Type:
Period Type:

- Details

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Period Type:

- Details

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Long-Term Debt - Interest, Fees, and Principal Payments (Details) - Secured Debt - USD ($) $ in Millions						9 Months Ended
	Apr. 06, 2018	Mar. 28, 2018	Mar. 27, 2018	Oct. 06, 2017	Nov. 08, 2016	Sep. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Line of Credit
Long-Term Debt
Reduction in variable rate spread (as a percent)		25.00%
Line of Credit \| Interest on Debt Instrument, Option One
Long-Term Debt
Variable rate basis floor (as a percent)		1.75%	2.00%
Variable rate spread (as a percent)				2.00%		2.75%
Line of Credit \| Interest on Debt Instrument, Option Two \| London Interbank Offered Rate (LIBOR)
Long-Term Debt
Variable rate spread (as a percent)		2.75%	3.00%	3.00%		3.75%
Line of Credit \| Existing Senior Secured Credit Facility, Term Loan Facility
Long-Term Debt
Prepayment requirement as a percentage of excess cash flow (as a percent)							50.00%
Prepayment requirement as a percentage of excess cash flow, reduced amount (as a percent)							25.00%
Excess cash flow offer								$ 0
Line of Credit \| Existing Senior Secured Credit Facility, Term Loan Facility \| Minimum
Long-Term Debt
Prepayment requirement as a percentage of excess cash flow, reduced amount, leverage ratio							1.50
Line of Credit \| Existing Senior Secured Credit Facility, Term Loan Facility \| Maximum
Long-Term Debt
Prepayment requirement as a percentage of excess cash flow, reduced amount, leverage ratio							2.00
Line of Credit \| Existing Senior Secured Credit Facility, Term Loan Facility \| Interest on Debt Instrument, Option One \| London Interbank Offered Rate (LIBOR)
Long-Term Debt
Variable rate basis floor (as a percent)	0.75%
Variable rate spread (as a percent)	2.75%
Line of Credit \| Existing Senior Secured Credit Facility, Term Loan Facility \| Interest on Debt Instrument, Option Two
Long-Term Debt
Alternate base rate (as a percent)	1.75%
Line of Credit \| Existing Senior Secured Credit Facility, Term Loan Facility \| Interest on Debt Instrument, Option Two \| One Month Adjusted London Interbank Offer Rate
Long-Term Debt
Variable rate basis floor (as a percent)	1.75%
Variable rate spread (as a percent)	1.00%
Line of Credit \| Existing Senior Secured Credit Facility, Term Loan Facility \| Interest on Debt Instrument, Option Two \| Federal Funds Effective Rate
Long-Term Debt
Variable rate spread (as a percent)	0.50%
Revolving Credit Facility
Long-Term Debt
Commitment fee (as a percent)					0.50%
Revolving Credit Facility \| Existing Senior Secured Credit Facility, Revolving Credit Facility \| Interest on Debt Instrument, Option One
Long-Term Debt
Variable rate basis floor (as a percent)	0.75%
Revolving Credit Facility \| Existing Senior Secured Credit Facility, Revolving Credit Facility \| Interest on Debt Instrument, Option Two \| Minimum
Long-Term Debt
Variable rate spread (as a percent)	2.25%
Alternate base rate (as a percent)	3.25%
Revolving Credit Facility \| Existing Senior Secured Credit Facility, Revolving Credit Facility \| Interest on Debt Instrument, Option Two \| Maximum
Long-Term Debt
Variable rate spread (as a percent)	2.50%
Alternate base rate (as a percent)	3.50%
Revolving Credit Facility \| Existing Senior Secured Credit Facility, Revolving Credit Facility \| Interest on Debt Instrument, Option Two \| One Month Adjusted London Interbank Offer Rate
Long-Term Debt
Variable rate spread (as a percent)	1.00%
Revolving Credit Facility \| Existing Senior Secured Credit Facility, Revolving Credit Facility \| Interest on Debt Instrument, Option Two \| Federal Funds Effective Rate
Long-Term Debt
Variable rate spread (as a percent)	0.50%