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

Represents the percentage of commitments component which the reporting entity's specified excess availability (as defined in the debt instrument) must exceed to avoid required compliance ratio requirements.

No definition available.

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

Represents the fixed amount which the reporting entity's specified excess availability (as defined in the debt instrument) must exceed to avoid required compliance ratio requirements.

No definition available.

Name:	hds_DebtInstrumentCovenantComplianceSpecifiedExcessAvailabilityThresholdComponent
Namespace Prefix:	hds_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the fixed charge ratio (as defined in the debt instrument) which the reporting entity is required to maintain in the event of a Liquidity Event (as defined).

No definition available.

Name:	hds_FixedChargeCoverageRatio
Namespace Prefix:	hds_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

Represents the aggregate borrowing capacity under the line of credit facility, including permitted incremental term loans, revolving or letter of credit facilities that may be added to the facility.

No definition available.

Name:	hds_LineOfCreditFacilityMaximumBorrowingCapacityIncludingIncrementalCommitments
Namespace Prefix:	hds_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

No definition available.

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

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

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

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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

- Details

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

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.

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

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).