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v2.4.1.9

DISCONTINUED OPERATIONS (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended | 3 Months Ended
--- | --- | --- | ---
Mar. 31, 2013 capital_lease | Dec. 31, 2014 vessel | Dec. 31, 2013 | Dec. 31, 2012 vessel | Dec. 31, 2012 vessel
Operating revenues |  | $ 559,688 us-gaap_Revenues | $ 517,190 us-gaap_Revenues | $ 578,361 us-gaap_Revenues |
Loss on sale of assets |  | (24,620)fro_GainLossOnSaleOfAssets | (23,558)fro_GainLossOnSaleOfAssets | (34,759)fro_GainLossOnSaleOfAssets |
Contingent rental expense (income) |  | 4,237 fro_ContingentRentalIncomeExpense | (8,726)fro_ContingentRentalIncomeExpense | 0 fro_ContingentRentalIncomeExpense |
Impairment of vessels |  |  | 103,700 us-gaap_TangibleAssetImpairmentCharges | 32,000 us-gaap_TangibleAssetImpairmentCharges |
Net loss from discontinued operations |  | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (1,204)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (12,544)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax |
Number of vessels disposed of | 1 fro_NumberOfVesselsDisposedOf |  |  |  |
Number of vessels impaired |  | 1 fro_NumberOfVesselsImpaired |  | 5 fro_NumberOfVesselsImpaired |
OBO [Member] |  |  |  |  |
Impairment of vessels |  |  |  | 27,300 us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByTypeAxis = fro_OboMember |
Number of vessels disposed of |  |  |  |  | 2 fro_NumberOfVesselsDisposedOf / fro_VesselsByTypeAxis = fro_OboMember
Number of vessels impaired |  |  |  | 4 fro_NumberOfVesselsImpaired / fro_VesselsByTypeAxis = fro_OboMember |
Number of vessels whose lease was terminated |  |  | 1 fro_Numberofvesselswhoseleasewasterminated / fro_VesselsByTypeAxis = fro_OboMember | 3 fro_Numberofvesselswhoseleasewasterminated / fro_VesselsByTypeAxis = fro_OboMember |
Front Rider [Member] |  |  |  |  |
Impairment of vessels |  |  |  | 4,900 us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontRiderMember |
Front Climber [Member] |  |  |  |  |
Impairment of vessels |  |  |  | 4,200 us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontClimberMember |
Front Driver [Member] |  |  |  |  |
Impairment of vessels |  |  |  | 4,000 us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontDriverMember |
Front Guider [Member] |  |  |  |  |
Impairment of vessels |  |  |  | 14,200 us-gaap_TangibleAssetImpairmentCharges / fro_VesselsByNameAxis = fro_FrontGuiderMember |
Discontinued Operations [Member] |  |  |  |  |
Operating revenues |  | 0 us-gaap_Revenues / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 1,840 us-gaap_Revenues / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 89,747 us-gaap_Revenues / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Loss on sale of assets |  | 0 fro_GainLossOnSaleOfAssets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (847)fro_GainLossOnSaleOfAssets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (17,946)fro_GainLossOnSaleOfAssets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Contingent rental expense (income) |  | 0 fro_ContingentRentalIncomeExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 0 fro_ContingentRentalIncomeExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 32,156 fro_ContingentRentalIncomeExpense / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Impairment of vessels |  | $ 0 us-gaap_TangibleAssetImpairmentCharges / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 0 us-gaap_TangibleAssetImpairmentCharges / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 27,316 us-gaap_TangibleAssetImpairmentCharges / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |

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