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

Period of time for a loan draw which changes the payment terms under the agreement to a requirement that interest be paid quarterly.

No definition available.

Name:	hds_DebtInstrumentLoanDuration
Namespace Prefix:	hds_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The percentage of the original aggregate principal amount payable in quarterly installments.

No definition available.

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

Represents the percentage attainment of certain secured leverage ratio targets which triggers mandatory prepayment of the debt instrument.

No definition available.

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

Debt Prepayment From Net Cash Proceeds Of Debt Offering, Asset Sale Or Insurance Recovery, Percentage

No definition available.

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

Represents the percentage of principal at which the debt must be redeemed if a change of control, as defined in the agreement occurs.

No definition available.

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

Represents the limit of incremental borrowing permitted under the line of credit facility for incremental term loans, revolving of letter of credit facilities if the reporting entity achieves the secured first lien leverage ratio specified in the debt instrument.

No definition available.

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

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

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

Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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

Minimum contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400