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IMPAIRMENT OF LONG TERM ASSETS (Details) (USD $)	9 Months Ended		12 Months Ended			1 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013 vessel	Dec. 31, 2014 vessel	Dec. 31, 2013 Rate	Dec. 31, 2012 vessel	Oct. 31, 2014	Nov. 30, 2014 vessel	Sep. 30, 2014	Mar. 31, 2013
Property, Plant and Equipment [Line Items]
Impairment loss on vessels			$ 97,709,000fro_ImpairedAssetstobeDisposedofbyMethodOtherthanSaleAmountofImpairmentLossContinuingOperations	$ 103,724,000fro_ImpairedAssetstobeDisposedofbyMethodOtherthanSaleAmountofImpairmentLossContinuingOperations	$ 4,726,000fro_ImpairedAssetstobeDisposedofbyMethodOtherthanSaleAmountofImpairmentLossContinuingOperations
Number of vessels impaired			1fro_NumberOfVesselsImpaired		5fro_NumberOfVesselsImpaired
Impairment of vessels				103,700,000us-gaap_TangibleAssetImpairmentCharges	32,000,000us-gaap_TangibleAssetImpairmentCharges
Asset Impairment Charges	12,400,000us-gaap_AssetImpairmentCharges			103,700,000us-gaap_AssetImpairmentCharges	32,000,000us-gaap_AssetImpairmentCharges
Lease Termination Probability	100.00%fro_LeaseTerminationProbability			100.00%fro_LeaseTerminationProbability
Number of vessels assigned a probability of lease termination		2fro_Numberofvesselsassignedaprobabilityofleasetermination
Front Opalia, Front Commerce & Front Commanche [Member]
Property, Plant and Equipment [Line Items]
Number of Leased Vessels Impaired			3fro_NumberofLeasedVesselsImpaired / fro_VesselsByNameAxis = fro_FrontOpaliaFrontCommerceFrontCommancheMember
VLCC Ulriken [Member]
Property, Plant and Equipment [Line Items]
Proceeds from Sale of Property, Plant, and Equipment						26,000,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / fro_VesselsByNameAxis = fro_VLCCUlrikenMember
Golden Victory [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels				45,600,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_GoldenVictoryMember
Front Champion [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels				42,500,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontChampionMember
Front Century [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels				15,600,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontCenturyMember
Front Rider [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels					4,900,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontRiderMember
Front Climber [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels					4,200,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontClimberMember
Front Driver [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels					4,000,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontDriverMember
Front Guider [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels					14,200,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontGuiderMember
Asset Impairment Charges					14,200,000us-gaap_AssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontGuiderMember
Front Pride [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels					4,700,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontPrideMember
VLCC Vessels [Member]
Property, Plant and Equipment [Line Items]
Number of Leased Vessels Impaired			3fro_NumberofLeasedVesselsImpaired / fro_VesselsByTypeAxis = fro_VlccVesselsMember
Number of vessels impaired				3fro_NumberOfVesselsImpaired / fro_VesselsByTypeAxis = fro_VlccVesselsMember
Asset Impairment Charges			85,300,000us-gaap_AssetImpairmentCharges / fro_VesselsByTypeAxis = fro_VlccVesselsMember
Number of vessels whose lease was terminated					3fro_Numberofvesselswhoseleasewasterminated / fro_VesselsByTypeAxis = fro_VlccVesselsMember		3fro_Numberofvesselswhoseleasewasterminated / fro_VesselsByTypeAxis = fro_VlccVesselsMember
VLCC Vessels [Member] | Front Opalia, Front Commerce & Front Commanche [Member]
Property, Plant and Equipment [Line Items]
Number of Leased Vessels Impaired			3fro_NumberofLeasedVesselsImpaired / fro_VesselsByNameAxis = fro_FrontOpaliaFrontCommerceFrontCommancheMember / fro_VesselsByTypeAxis = fro_VlccVesselsMember
OBO [Member]
Property, Plant and Equipment [Line Items]
Number of vessels impaired					4fro_NumberOfVesselsImpaired / fro_VesselsByTypeAxis = fro_OboMember
Impairment of vessels					27,300,000us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByTypeAxis = fro_OboMember
Number of vessels whose lease was terminated				1fro_Numberofvesselswhoseleasewasterminated / fro_VesselsByTypeAxis = fro_OboMember	3fro_Numberofvesselswhoseleasewasterminated / fro_VesselsByTypeAxis = fro_OboMember
Double Hull Suezmax [Member]
Property, Plant and Equipment [Line Items]
Number of vessels impaired					1fro_NumberOfVesselsImpaired / fro_VesselsByTypeAxis = fro_DoubleHullSuezmaxMember
Front Opalia [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels			27,800,000us-gaap_TangibleAssetImpairmentCharges / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = fro_FrontOpaliaMember
Front Commerce [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels			26,700,000us-gaap_TangibleAssetImpairmentCharges / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = fro_FrontCommerceMember
Front Comanche [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels			30,700,000us-gaap_TangibleAssetImpairmentCharges / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = fro_FrontComancheMember
VLCC Ulriken [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels								12,400,000us-gaap_TangibleAssetImpairmentCharges / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = fro_VLCCUlrikenMember
VLCC Ulriken [Member] | VLCC Vessels [Member]
Property, Plant and Equipment [Line Items]
Number of vessels impaired			1fro_NumberOfVesselsImpaired / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = fro_VLCCUlrikenMember / fro_VesselsByTypeAxis = fro_VlccVesselsMember
Ship Finance International Limited [Member] | Front Pride [Member]
Property, Plant and Equipment [Line Items]
Significant Acquisitions and Disposals, Gain (Loss) on Sale or Disposal, Pretax									200,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = fro_ShipFinanceInternationalLimitedMember / fro_VesselsByNameAxis = fro_FrontPrideMember
Equipment [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels			62,153,000us-gaap_TangibleAssetImpairmentCharges / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember
Equipment [Member] | Front Champion / Golden Victory [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels				88,100,000us-gaap_TangibleAssetImpairmentCharges / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = fro_FrontChampionGoldenVictoryMember
Equipment [Member] | VLCC Ulriken [Member]
Property, Plant and Equipment [Line Items]
Impairment of vessels								12,400,000us-gaap_TangibleAssetImpairmentCharges / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = fro_VLCCUlrikenMember
Equipment [Member] | Ship Finance International Limited [Member] | Front Champion / Golden Victory [Member]
Property, Plant and Equipment [Line Items]
Significant Acquisitions and Disposals, Gain (Loss) on Sale or Disposal, Pretax				$ 13,800,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = fro_ShipFinanceInternationalLimitedMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = fro_FrontChampionGoldenVictoryMember

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