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

No definition available.

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

No definition available.

Name:	hsc_ReconciliationOfNetUnrecognizedTaxBenefitsRollForward
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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
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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
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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
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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
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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
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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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Amount of unrecognized tax benefits.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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

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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.

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

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

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