XML 68 R96.htm IDEA: XBRL DOCUMENT v2.4.1.9
DISPOSAL OF ASSETS (Details) (USD $)
0 Months Ended 12 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended
Jul. 15, 2014
vessel
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Sep. 30, 2014
Oct. 31, 2014
Sep. 30, 2011
Jun. 30, 2012
Dec. 31, 2012
Feb. 28, 2013
Nov. 30, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2014
Dec. 31, 2011
Sep. 30, 2012
Oct. 02, 2014
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid       $ 32,600,000fro_RelatedPartyLeaseTerminationPaymentsPaid                          
Number of vessels owned through ITCL 4fro_NumberOfVesselsOwnedThroughItcl                                
Impairment of vessels     103,700,000us-gaap_TangibleAssetImpairmentCharges 32,000,000us-gaap_TangibleAssetImpairmentCharges                          
Net gain on lease terminations   40,382,000us-gaap_GainLossOnContractTermination 21,237,000us-gaap_GainLossOnContractTermination 21,806,000us-gaap_GainLossOnContractTermination                          
VLCC Ulriken [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels         12,400,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_VLCCUlrikenMember
                       
Altair Voyager, Cygnus Voyager and Sirius Voyager [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain on lease terminations           1,300,000us-gaap_GainLossOnContractTermination
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_AltairVoyagerCygnusVoyagerandSiriusVoyagerMember
                     
Vessels and Equipment [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels   62,153,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
                             
Vessels and Equipment [Member] | Front Alfa [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale                       (2,100,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontAlfaMember
         
Impairment of vessels             24,800,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontAlfaMember
                   
Vessels and Equipment [Member] | Front Rider [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels               4,900,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontRiderMember
                 
Vessels and Equipment [Member] | Front Climber [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels               4,200,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontClimberMember
                 
Vessels and Equipment [Member] | Front Driver [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels               4,000,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontDriverMember
                 
Vessels and Equipment [Member] | Front Guider [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels                 14,200,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontGuiderMember
               
Vessels and Equipment [Member] | Edinburgh (Ex Titan Aries) [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale                         7,600,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_EdinburghExTitanAriesMember
       
Vessels and Equipment [Member] | Front Pride [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels       4,700,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontPrideMember
                         
Vessels and Equipment [Member] | Front Champion / Golden Victory [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels     88,100,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontChampionGoldenVictoryMember
                           
Vessels and Equipment [Member] | VLCC Ulysses (ex Phoenix Voyager) [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale                           15,700,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_VLCCUlyssesexPhoenixVoyagerMember
     
Vessels and Equipment [Member] | VLCC Ulriken [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Impairment of vessels         12,400,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_VLCCUlrikenMember
                       
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Striver [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid       8,100,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontStriverMember
                         
Net gain (loss) on sale               (400,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontStriverMember
            (9,200,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontStriverMember
   
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Titan Orion (ex-Front Duke) [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale                       10,600,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_TitanOrionExFrontDukeMember
         
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Rider [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale                               (100,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontRiderMember
 
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Climber [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale       (200,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontClimberMember
        (200,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontClimberMember
               
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Driver [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale       (800,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontDriverMember
        (800,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontDriverMember
               
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Ticen Ocean (renamed Front Lady) [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale       11,200,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_TicenOceanRenamedFrontLadyMember
        11,200,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_TicenOceanRenamedFrontLadyMember
               
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Viewer & Front Guider [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid                 23,500,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontViewerFrontGuiderMember
               
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Viewer [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid                 12,700,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontViewerMember
               
Net gain (loss) on sale     (16,500,000)us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontViewerMember
                           
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Guider [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid                 10,800,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontGuiderMember
               
Capital lease modification adjustment to carrying value of asset                 9,100,000fro_CapitalLeaseModificationAdjustmentToCarryingValueOfAsset
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontGuiderMember
               
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Pride [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid                   2,100,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontPrideMember
             
Net gain (loss) on sale     200,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontPrideMember
                           
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Champion / Golden Victory [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale     13,800,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontChampionGoldenVictoryMember
                           
Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Opalia, Front Commerce and Front Comanche [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Net gain (loss) on sale   40,400,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalPretax
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontOpaliaFrontCommerceandFrontComancheMember
                             
Impairment of vessels   85,300,000us-gaap_TangibleAssetImpairmentCharges
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontOpaliaFrontCommerceandFrontComancheMember
                             
Upfront Payment / Note Payable [Member] | Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Champion / Golden Victory [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid                     89,900,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ fro_MethodofPaymentAxis
= fro_UpfrontPaymentNotePayableMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontChampionGoldenVictoryMember
           
Upfront Payment / Note Payable [Member] | Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Opalia, Front Commerce and Front Comanche [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid   58,800,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ fro_MethodofPaymentAxis
= fro_UpfrontPaymentNotePayableMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontOpaliaFrontCommerceandFrontComancheMember
                             
Upfront Payment [Member] | Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Champion / Golden Victory [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid                     10,900,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ fro_MethodofPaymentAxis
= fro_UpfrontPaymentMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontChampionGoldenVictoryMember
           
Upfront Payment [Member] | Ship Finance International Limited [Member] | Vessels and Equipment [Member] | Front Opalia, Front Commerce and Front Comanche [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Related party, Lease termination payments paid   10,500,000fro_RelatedPartyLeaseTerminationPaymentsPaid
/ fro_MethodofPaymentAxis
= fro_UpfrontPaymentMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_EquipmentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fro_ShipFinanceInternationalLimitedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= fro_FrontOpaliaFrontCommerceandFrontComancheMember
                             
Variable Interest Entities CalPetro Bahamas B1, CalPetro Bahamas BII, CalPetro IOM [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Proceeds from contract termination held in restricted cash                                 700,000us-gaap_RestrictedCashAndCashEquivalents
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= fro_VariableInterestEntitiesCalpetroBahamasB1CalpetroBahamasBiiCalpetroIomMember
Altair Voyager, Cygnus Voyager and Sirius Voyager [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Number of vessels sold from early termination Agreement           3fro_NumberofVesselsSoldfromEarlyTerminationAgreement
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= fro_AltairVoyagerCygnusVoyagerandSiriusVoyagerMember
                     
Proceeds from contract termination held in restricted cash           700,000us-gaap_RestrictedCashAndCashEquivalents
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= fro_AltairVoyagerCygnusVoyagerandSiriusVoyagerMember
                     
Variable Interest Entity, Primary Beneficiary | Variable Interest Entities CalPetro Bahamas B1, CalPetro Bahamas BII, CalPetro IOM [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Proceeds from contract termination held in restricted cash           $ 700,000us-gaap_RestrictedCashAndCashEquivalents
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= fro_VariableInterestEntitiesCalpetroBahamasB1CalpetroBahamasBiiCalpetroIomMember
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
                     
Altair Voyager, Cygnus Voyager and Sirius Voyager [Member]                                  
Significant Acquisitions and Disposals [Line Items]                                  
Number of vessels whose lease was terminated           3fro_Numberofvesselswhoseleasewasterminated
/ fro_VesselsByNameAxis
= fro_AltairVoyagerCygnusVoyagerandSiriusVoyagerMember