Name:	hsc_DebtInstrumentCovenantMinimumConsolidatedInterestCoverageRatioDenominator
Namespace Prefix:	hsc_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Represents the numerator of the minimum ratio of consolidated adjusted earnings before interest, taxes, depreciation and amortization to interest expense, which is necessary to be maintained under the terms of the senior credit facilities' covenants.

No definition available.

Name:	hsc_DebtInstrumentCovenantMinimumConsolidatedInterestCoverageRatioNumerator
Namespace Prefix:	hsc_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

The contingent maximum borrowing capacity under the credit facility should the company exercise its option to do so under the credit facility.

No definition available.

Name:	hsc_LineOfCreditFacilityContingentIncreaseToMaximiumBorrowingCapacity
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the maximum subsidiary consolidated indebtedness as a percentage of consolidated tangible assets allowed under the credit facility covenants.

No definition available.

Name:	hsc_LineOfCreditFacilityCovenantMaximumConsolidatedIndebtednessOfSubsidiaryToConsolidatedTangibleAssetsPercentage
Namespace Prefix:	hsc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the maximum debt to capital ratio allowed under the credit facility covenants.

No definition available.

Name:	hsc_LineOfCreditFacilityCovenantMaximumDebtToCapitalRatio
Namespace Prefix:	hsc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the number of lenders in the syndicate providing the credit facility.

No definition available.

Name:	hsc_LineOfCreditFacilityNumberOfLenders
Namespace Prefix:	hsc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the term of line of credit facility.

No definition available.

Name:	hsc_LineOfCreditFacilityTerm
Namespace Prefix:	hsc_
Data Type:	us-types:durationStringItemType
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

- 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.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

Reference 3: 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

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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688