XML 39 R61.htm IDEA: XBRL DOCUMENT v2.4.1.9
Equity Method Investments (Details 2) (Infrastructure Transaction Strategic Venture [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]      
Equity method investment - Brand 296,082us-gaap_EquityMethodInvestmentsFairValueDisclosure 296,082us-gaap_EquityMethodInvestmentsFairValueDisclosure $ 285,700us-gaap_EquityMethodInvestmentsFairValueDisclosure
Discounted Cash Flow Approach Valuation Technique [Member] | Minimum
     
Schedule of Equity Method Investments [Line Items]      
Fair value unobservable input, EBITDA margin   10.90%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, ratio of capital expenditures to revenue   2.90%hsc_FairValueInputsRatioOfCapitalExpendituresToRevenue
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, long-term revenue growth   3.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, WACC rate   9.25%hsc_FairValueInputsDiscountRateWeightedAverageCostOfCapital
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, cost of equity   12.50%hsc_FairValueInputsDiscountRateCostOfEquity
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, implied exit EBITDA multiple 7.0us-gaap_FairValueInputsEarningsBeforeInterestTaxesDepreciationAndAmortizationMultiple
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
   
Fair value unobservable input, discount for lack of marketability   15.00%us-gaap_FairValueInputsDiscountForLackOfMarketability
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Discounted Cash Flow Approach Valuation Technique [Member] | Maximum
     
Schedule of Equity Method Investments [Line Items]      
Fair value unobservable input, EBITDA margin   12.60%us-gaap_FairValueInputsLongtermPreTaxOperatingMarginPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, ratio of capital expenditures to revenue   3.80%hsc_FairValueInputsRatioOfCapitalExpendituresToRevenue
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, long-term revenue growth   3.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, WACC rate   9.25%hsc_FairValueInputsDiscountRateWeightedAverageCostOfCapital
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, cost of equity   12.50%hsc_FairValueInputsDiscountRateCostOfEquity
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
 
Fair value unobservable input, implied exit EBITDA multiple 7.5us-gaap_FairValueInputsEarningsBeforeInterestTaxesDepreciationAndAmortizationMultiple
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember
   
Fair value unobservable input, discount for lack of marketability   15.00%us-gaap_FairValueInputsDiscountForLackOfMarketability
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hsc_InfrastructureTransactionStrategicVentureMember
/ us-gaap_ValuationTechniqueAxis
= us-gaap_IncomeApproachValuationTechniqueMember