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v2.4.1.9

VESSELS UNDER CAPITAL LEASE, NET 3 (Details) (USD $) | 12 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 vessel | Dec. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2011 | Dec. 31, 2011
Number of vessels in each variable interest entity | 1 fro_NumberOfVesselsInEachVariableInterestEntity |  |  |  |
Contingent rental expense (income) | $ 4,237,000 fro_ContingentRentalIncomeExpense | $ (8,726,000)fro_ContingentRentalIncomeExpense | $ 0 fro_ContingentRentalIncomeExpense |  |
Deferred lease liability | 0 fro_DeferredLeaseLiability | 0 fro_DeferredLeaseLiability | 3,795,000 fro_DeferredLeaseLiability |  |
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 |  |
Special Purpose Entities [Member] |  |  |  |  |
Vessels leased from variable interest entities | 4 fro_VesselsLeasedFromVariableInterestEntities / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 4 fro_VesselsLeasedFromVariableInterestEntities / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |  |  |
Original cost to the lessor of the assets under variable interest entity arrangement | 258,000,000 fro_OriginalCostToLessorOfAssetsUnderVariableInterestEntityArrangement / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 258,000,000 fro_OriginalCostToLessorOfAssetsUnderVariableInterestEntityArrangement / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |  |  |
Guarantor obligations, maximum exposure, undiscounted | 36,000,000 us-gaap_GuaranteeObligationsMaximumExposure / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 36,000,000 us-gaap_GuaranteeObligationsMaximumExposure / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |  |  |
Profit share payment basis | 25.00%fro_ProfitSharePaymentBasis / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |  |  |  |
Profit share expense | 0 fro_ProfitShareExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 0 fro_ProfitShareExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 0 fro_ProfitShareExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |  |
Repayments of Debt and Capital Lease Obligations | 12,948,000 us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 12,260,000 us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 11,665,000 us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |  |
Contingent rental expense (income) | 4,237,000 fro_ContingentRentalIncomeExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | (7,761,000)fro_ContingentRentalIncomeExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 2,436,000 fro_ContingentRentalIncomeExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |  |
Capital Leases, Income Statement, Interest Expense | 4,429,000 us-gaap_CapitalLeasesIncomeStatementInterestExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 5,389,000 us-gaap_CapitalLeasesIncomeStatementInterestExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 6,301,000 us-gaap_CapitalLeasesIncomeStatementInterestExpense / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |  |
Sale leaseback transaction, gross proceeds |  |  |  | 67,000,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember |
Operating Lease Length |  |  |  | 2 years |
Maritime Equipment [Member] | VLCC Front Eagle renamed DHT Eagle [Member] |  |  |  |  |
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
Maritime Equipment [Member] | VLCC Front Eagle renamed DHT Eagle [Member] | Sale and Lease Back Transactions [Member] |  |  |  |  |
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 |  |

X
- Definition Contingent rental income (expense) + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

X
- Definition The liability arising as a result of the actual indexed rate of hire paid under a capital lease being lower than the minimum lease rentals. Only arises when the lease contains provisions whereby future increases in the indexed rate of hire can lead to a claw back of hires. + References No definition available. + Details
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Namespace Prefix: | fro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The net gain or loss resulting from the sale, transfer, termination, or other disposition of assets during the period and amortization of deferred gains. + References No definition available. + Details
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Namespace Prefix: | fro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Gain on sale leaseback transaction recognized in period including amortized gains. + References No definition available. + Details
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- Definition Number of vessels in each variable interest entity + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
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- Definition Operating Lease Length + References No definition available. + Details
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Namespace Prefix: | fro_
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Balance Type: | na
Period Type: | duration

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- Definition Original cost to the lessor of the assets under variable interest entity arrangement + References No definition available. + Details
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Namespace Prefix: | fro_
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- Definition Amount of expense from profit sharing contracts or arrangements. + References No definition available. + Details
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Namespace Prefix: | fro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition A profit share payment will be due at the end of the lease based on the excess of the aggregate on the index rate over the aggregate of the former rate + References No definition available. + Details
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- Definition Vessels leased from variable interest entities + References No definition available. + Details
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- Definition The financing charge for leasing arrangements meeting the criteria for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45031-112735 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt and payment of capital lease obligations. + References No definition available. + Details
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- Definition Amount of cash inflow before closing and deferred financing costs received by a seller-lessee in a sale-leaseback recognized in investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51840-112757 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51831-112757 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51843-112757 + Details
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- Details
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- Details
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