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v2.4.1.9

LEASES (Details) (USD $) | 12 Months Ended | 1 Months Ended
--- | --- | ---
Dec. 31, 2014 vessel | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Jan. 31, 2011 | Mar. 31, 2011
Leases, Schedule of Leased Assets [Line Items] |  |  |  |  |  |
Total vessels leased in on long-term time and bareboat charters | 21 fro_TotalVesselsLeasedIn |  |  |  |  |
Rental expense for operating leases | $ 2,200,000 us-gaap_LeaseAndRentalExpense | $ 6,600,000 us-gaap_LeaseAndRentalExpense | $ 40,000,000 us-gaap_LeaseAndRentalExpense |  |  |
Gain on sale of assets and amortization of deferred gains | 24,620,000 fro_GainLossOnSaleOfAssets | 23,558,000 fro_GainLossOnSaleOfAssets | 34,759,000 fro_GainLossOnSaleOfAssets |  |  |
Charter hire expenses | 0 fro_CharterhireExpenses | 4,176,000 fro_CharterhireExpenses | 37,461,000 fro_CharterhireExpenses |  |  |
Future minimum operating lease payments |  |  |  |  |  |
2015 | 1,908,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent |  |  |  |  |
2016 | 642,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears |  |  |  |  |
2017 | 508,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears |  |  |  |  |
2018 | 350,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears |  |  |  |  |
2019 | 334,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears |  |  |  |  |
Thereafter | 1,586,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter |  |  |  |  |
Total minimum lease payments | 5,328,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue |  |  |  |  |
Minimum lease revenues [Abstract] |  |  |  |  |  |
2015 | 4,435,000 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent |  |  |  |  |
2016 | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears |  |  |  |  |
2017 | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears |  |  |  |  |
2018 | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears |  |  |  |  |
2019 | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears |  |  |  |  |
Thereafter | 0 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter |  |  |  |  |
Total minimum lease revenues | 4,435,000 us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable |  |  |  |  |
Maritime Equipment [Member] | Front VLCC Shanghai renamed Gulf Eyadah [Member] |  |  |  |  |  |
Leases, Schedule of Leased Assets [Line Items] |  |  |  |  |  |
Gain on sale of assets and amortization of deferred gains |  |  |  | 6,400,000 fro_GainLossOnSaleOfAssets / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_FrontVlccShanghaiRenamedGulfEyadahMember |  |
Maritime Equipment [Member] | VLCC Front Eagle renamed DHT Eagle [Member] |  |  |  |  |  |
Leases, Schedule of Leased Assets [Line Items] |  |  |  |  |  |
Gain on sale of assets and amortization of deferred gains |  |  |  | 3,200,000 fro_GainLossOnSaleOfAssets / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_VlccFrontEagleRenamedDhtEagleMember |  |
Assets Leased to Others [Member] |  |  |  |  |  |
Leases, Schedule of Leased Assets [Line Items] |  |  |  |  |  |
Cost of vessels | 46,200,000 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsLeasedToOthersMember | 166,300,000 us-gaap_PropertyPlantAndEquipmentGross / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsLeasedToOthersMember |  |  |  |
Accumulated depreciation of vessels | 33,200,000 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsLeasedToOthersMember | 28,800,000 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsLeasedToOthersMember |  |  |  |
Assets Held under Operating Leases [Member] |  |  |  |  |  |
Leases, Schedule of Leased Assets [Line Items] |  |  |  |  |  |
Number of vessels leased on operating leases which were disposed over during the period (in number of vessels) |  |  | 4 fro_NumberOfVesselsLeasedOnOperatingLeasesWhichWereDisposedOverDuringPeriod / fro_LeaseTypeAxis = fro_AssetsHeldUnderOperatingLeasesMember |  |  |
Sale and Lease Back Transactions [Member] | Maritime Equipment [Member] | Front VLCC Shanghai renamed Gulf Eyadah [Member] |  |  |  |  |  |
Leases, Schedule of Leased Assets [Line Items] |  |  |  |  |  |
Charter duration of new contract with new owners |  |  |  |  | 2 years |
Charter rate per day of vessel |  |  |  |  | 35,000 fro_SaleLeasebackTransactionDailyRentalRevenue / fro_LeaseTypeAxis = fro_SaleAndLeaseBackTransactionsMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_FrontVlccShanghaiRenamedGulfEyadahMember |
Gain on sale leaseback transaction recognized in period | 0 fro_GainOnSaleLeasebackTransactionRecognizedInPeriod / fro_LeaseTypeAxis = fro_SaleAndLeaseBackTransactionsMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_FrontVlccShanghaiRenamedGulfEyadahMember | 0 fro_GainOnSaleLeasebackTransactionRecognizedInPeriod / fro_LeaseTypeAxis = fro_SaleAndLeaseBackTransactionsMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_FrontVlccShanghaiRenamedGulfEyadahMember | 7,900,000 fro_GainOnSaleLeasebackTransactionRecognizedInPeriod / fro_LeaseTypeAxis = fro_SaleAndLeaseBackTransactionsMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_FrontVlccShanghaiRenamedGulfEyadahMember |  |  |
Sale and Lease Back Transactions [Member] | Maritime Equipment [Member] | VLCC Front Eagle renamed DHT Eagle [Member] |  |  |  |  |  |
Leases, Schedule of Leased Assets [Line Items] |  |  |  |  |  |
Charter duration of new contract with new owners |  |  |  |  |  | 2 years
Charter rate per day of vessel |  |  |  |  |  | 32,500 fro_SaleLeasebackTransactionDailyRentalRevenue / fro_LeaseTypeAxis = fro_SaleAndLeaseBackTransactionsMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_VlccFrontEagleRenamedDhtEagleMember
Gain on sale leaseback transaction recognized in period | 0 fro_GainOnSaleLeasebackTransactionRecognizedInPeriod / fro_LeaseTypeAxis = fro_SaleAndLeaseBackTransactionsMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_VlccFrontEagleRenamedDhtEagleMember | 2,300,000 fro_GainOnSaleLeasebackTransactionRecognizedInPeriod / fro_LeaseTypeAxis = fro_SaleAndLeaseBackTransactionsMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_VlccFrontEagleRenamedDhtEagleMember | 7,200,000 fro_GainOnSaleLeasebackTransactionRecognizedInPeriod / fro_LeaseTypeAxis = fro_SaleAndLeaseBackTransactionsMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember / fro_VesselsByNameAxis = fro_VlccFrontEagleRenamedDhtEagleMember |  |  |
Special Purpose Entities [Member] | Maritime Equipment [Member] |  |  |  |  |  |
Leases, Schedule of Leased Assets [Line Items] |  |  |  |  |  |
Charter hire expenses | $ 0 fro_CharterhireExpenses / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember | $ 0 fro_CharterhireExpenses / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember | $ 40,000 fro_CharterhireExpenses / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember / us-gaap_MajorPropertyClassAxis = us-gaap_MaritimeEquipmentMember |  |  |

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