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INVESTMENT IN FINANCE LEASE (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 vessel | Dec. 31, 2013 vessel
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Vessels Accounted for as Sales Type Leases [Abstract] |  |
Number of vessels leased to third parties on time charter classified as investment in finance lease | 1 fro_NumberOfVesselsLeasedToThirdPartiesOnTimeCharterClassifiedAsInvestmentInFinanceLease | 1 fro_NumberOfVesselsLeasedToThirdPartiesOnTimeCharterClassifiedAsInvestmentInFinanceLease
Components of the investment in sales-type leases [Abstract] |  |
Net minimum lease payments receivable | $ 67,145 us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeasesMinimumPaymentsToBeReceived | $ 78,452 us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeasesMinimumPaymentsToBeReceived
Estimated residual values of leased property (unguaranteed) | 20,320 us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeasesUnguaranteedResidualValuesOfLeasedProperty | 20,320 us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeasesUnguaranteedResidualValuesOfLeasedProperty
Less: unearned income | (38,647)us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeasesDeferredIncome | (47,398)us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeasesDeferredIncome
Total investment in sales-type lease | 48,818 us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeases | 51,374 us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeases
Current portion | 3,028 us-gaap_CapitalLeasesLessorBalanceSheetNetInvestmentInSalesTypeLeasesCurrent | 2,555 us-gaap_CapitalLeasesLessorBalanceSheetNetInvestmentInSalesTypeLeasesCurrent
Long-term portion | 45,790 us-gaap_CapitalLeasesLessorBalanceSheetNetInvestmentInSalesTypeLeasesNoncurrent | 48,819 us-gaap_CapitalLeasesLessorBalanceSheetNetInvestmentInSalesTypeLeasesNoncurrent
Total investment in sales-type lease | 48,818 us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeases | 51,374 us-gaap_CapitalLeasesNetInvestmentInSalesTypeLeases
Future minimum gross revenues [Abstract] |  |
2015 | 11,307 us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableCurrent |
2016 | 11,338 us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableInTwoYears |
2017 | 11,307 us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableInThreeYears |
2018 | 11,307 us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableInFourYears |
2019 | 11,307 us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableInFiveYears |
Thereafter | 10,579 us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableDueThereafter |
Total minimum lease revenues | $ 67,145 us-gaap_CapitalLeasesFutureMinimumPaymentsReceivable |

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- Definition Number of Vessels Leased to Third Parties on Time Charter Classified as Investment in Finance Lease + References No definition available. + Details
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- Definition Amount of minimum lease payments to be received by the lessor for capital leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition Amount of minimum lease payments to be received by the lessor for capital leases in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition Amount of minimum lease payments to be received by the lessor for capital leases after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition Amount of minimum lease payments to be received by the lessor for capital leases in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition Amount of minimum lease payments to be received by the lessor for capital leases in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition Amount of minimum lease payments to be received by the lessor for capital leases in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition Amount of minimum lease payments to be received by the lessor for capital leases in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition The net amount due within one year of the balance sheet date or the normal operating cycle, if longer, consisting of: (a) minimum lease payments on sales type leases and (b) unguaranteed residual value; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition The net amount due after one year of the balance sheet date or beyond the normal operating cycle, if longer, consisting of: (a) minimum lease payments on sales type leases, and (b) unguaranteed residual value; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition The net investment in sales type leases as of the balance sheet date consisting of: (a) minimum lease payments on sales type leases and (b) unguaranteed residual value; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition The remaining (unamortized) difference between the gross investment in a sales-type lease and the cost or carrying amount of the leased property as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition Amount of remaining payments as of the balance sheet date that lessees are obligated to make or can be required to make under sales-type leases, including any guarantee of residual value and executory costs. The amount also includes any guaranteed rental payments by an unrelated third-party provided that are financially capable of making such payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=7661868&loc=d3e34102-112682 + Details
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- Definition The estimate of the lease property's economic value at the end of the sales-type lease term excluding any amounts guaranteed by either the lessee or a third-party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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