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FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 types_of_risk instrument | Dec. 31, 2013 instrument | Dec. 31, 2012 instrument
Fair Value Disclosures [Abstract] |  |  |
Number of risks related to subsidiaries' reporting in foreign currency | 2 fro_NumberOfRisksRelatedToSubsidiariesReportingInForeignCurrency |  |
Number of forward freight contracts entered into and outstanding for speculative purposes | 0 us-gaap_DerivativeNumberOfInstrumentsHeld | 0 us-gaap_DerivativeNumberOfInstrumentsHeld | 24 us-gaap_DerivativeNumberOfInstrumentsHeld
Mark to market of derivatives | $ 0 us-gaap_GainLossOnDerivativeInstrumentsNetPretax | $ 585 us-gaap_GainLossOnDerivativeInstrumentsNetPretax | $ 1,725 us-gaap_GainLossOnDerivativeInstrumentsNetPretax

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- Definition Number of risks related to company's subsidiaries' reporting in Sterling, Singapore dollars or Norwegian kroner currencies. Such risks include transaction risk and translation risk. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959 + Details
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- Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 + Details
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Period Type: | duration