Name:	hds_DebtInstrumentFinancingAndOtherCosts
Namespace Prefix:	hds_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Floor rate of a debt instrument.

No definition available.

Name:	hds_DebtInstrumentFloorRate
Namespace Prefix:	hds_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the modification and extinguishment charges related to the debt instrument.

No definition available.

Name:	hds_DebtInstrumentModificationAndExtinguishmentCharge
Namespace Prefix:	hds_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the aggregate annual amount of debt instruments to be amortized as a percentage of the original principal amount.

No definition available.

Name:	hds_RepaymentOfDebtAggregateAnnualAmountAsPercentageOfOriginalPrincipalAmount
Namespace Prefix:	hds_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt and unamortized discount.

No definition available.

Name:	hds_WriteOffOfDeferredDebtIssuanceCostAndUnamortizedDiscount
Namespace Prefix:	hds_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

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

Name:	dei_LegalEntityAxis=us-gaap_SubsidiaryIssuerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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

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

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: