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Data Type:	xbrli:monetaryItemType
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The gross amount of decreases in deferred tax benefits resulting from tax positions taken in prior period tax returns.

No definition available.

Name:	hsc_DeferredTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

The gross amount of decreases in deferred tax benefits resulting from settlements with taxing authorities.

No definition available.

Name:	hsc_DeferredTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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The gross amount of increases in deferred tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period.

No definition available.

Name:	hsc_DeferredTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
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The gross amount of increases in deferred tax benefits resulting from tax positions taken in prior period tax returns.

No definition available.

Name:	hsc_DeferredTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
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The gross amount of decreases in deferred tax benefits resulting from lapses of the applicable statutes of limitation.

No definition available.

Name:	hsc_DeferredTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
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-- None. No documentation exists for this element. --

No definition available.

Name:	hsc_ReconciliationOfDeferredIncomeTaxBenefitsRollForward
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

-- None. No documentation exists for this element. --

No definition available.

Name:	hsc_ReconciliationOfNetUnrecognizedTaxBenefitsRollForward
Namespace Prefix:	hsc_
Data Type:	xbrli:stringItemType
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Unrecognized Tax Benefits Deceases Resulting from Current Period Tax Positions, Net

No definition available.

Name:	hsc_UnrecognizedTaxBenefitsDeceasesResultingfromCurrentPeriodTaxPositionsNet
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
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The net amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

No definition available.

Name:	hsc_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositionsNet
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The net amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

No definition available.

Name:	hsc_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthoritiesNet
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The net amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period.

No definition available.

Name:	hsc_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositionsNet
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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The net amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

No definition available.

Name:	hsc_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositionsNet
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The net amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

No definition available.

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

The net amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitation.

No definition available.

Name:	hsc_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitationsNet
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Amount of unrecognized tax benefits.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
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-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
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-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319