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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Provider
Revenue and Cost Recognition [Abstract]  
Number of telecommunications providers through contracts under maintenance 60hchc_NumberOfTelecommunicationProviders
Unapproved change orders on open projects $ 66.9us-gaap_UnapprovedChangeOrdersAmount
Minimum [Member] | Global Marine Systems Limited [Member]  
Revenue and Cost Recognition [Abstract]  
Contract term to provide maintenance of cable system 5 years
Term of fixed price contract 1 month
Minimum [Member] | Buildings and Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of property, plant and equipment 15 years
Minimum [Member] | Machinery and Equipment [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of property, plant and equipment 3 years
Minimum [Member] | Plant and Motor Vehicles [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of property, plant and equipment 3 years
Maximum [Member] | Global Marine Systems Limited [Member]  
Revenue and Cost Recognition [Abstract]  
Contract term to provide maintenance of cable system 7 years
Term of fixed price contract 5 months
Maximum [Member] | Buildings and Improvements [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of property, plant and equipment 40 years
Maximum [Member] | Machinery and Equipment [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of property, plant and equipment 15 years
Maximum [Member] | Cable-Ships and Submersibles [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of property, plant and equipment 35 years
Maximum [Member] | Plant and Motor Vehicles [Member]  
Property, Plant and Equipment [Line Items]  
Estimated useful lives of property, plant and equipment 20 years
Schuff International, Inc [Member]  
Noncontrolling Interest [Line Items]  
Percentage of ownership interest owned (in hundredths) 91.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= hchc_SchuffInternationalIncMember
American Natural Gas [Member]  
Noncontrolling Interest [Line Items]  
Percentage of ownership interest owned (in hundredths) 51.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= hchc_AmericanNaturalGasMember
Genovel Orthopedics, Inc [Member]  
Noncontrolling Interest [Line Items]  
Percentage of ownership interest owned (in hundredths) 80.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= hchc_GenovelOrthopedicsIncMember
Global Marine Systems Limited [Member]  
Noncontrolling Interest [Line Items]  
Percentage of ownership interest owned (in hundredths) 97.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= hchc_GlobalMarineSystemsLimitedMember
Gem Derm Aesthetics, Inc [Member]  
Noncontrolling Interest [Line Items]  
Percentage of ownership interest owned (in hundredths) 61.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= hchc_GemDermAestheticsIncMember
DMi, Inc. [Member]  
Noncontrolling Interest [Line Items]  
Percentage of ownership interest owned (in hundredths) 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= hchc_DmiIncorporationMember