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INTEREST RATE SWAP AGREEMENTS (Details) (Predecessor, USD $) In Thousands, unless otherwise specified | 0 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 30, 2014 | Mar. 31, 2014
Interest rate swaps designated as cash flow hedges |  |
Number of interest rate swap agreements outstanding |  | 1 us-gaap_NumberOfInterestRateDerivativesHeld
Notional amount outstanding |  | 106,233 invest_DerivativeNotionalAmount
Chapter 11 | DNB Bank ASA |  |
Interest rate swaps designated as cash flow hedges |  |
Secured claim issued with the Bankruptcy Court | $ 5,622 us-gaap_BankruptcyClaimsAmountOfClaimsFiled / dei_LegalEntityAxis = gnk_DNBBankASAMember / gnk_ReorganizationAxis = gnk_Chapter11OfUSBankruptcyCodeMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
2007 Credit Facility |  |
Interest rate swaps designated as cash flow hedges |  |
Term of interest periods when Company is in default under covenants of 2007 Credit Facility |  | 1 month

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- Definition The term of interest periods when the Company is in default under the covenants of its 2007 Credit Facility. + References No definition available. + Details
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Period Type: | duration

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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Balance Type: | na
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- Definition Amount of bankruptcy claim filed with bankruptcy court. + References No definition available. + Details
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Period Type: | duration

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- Details
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Period Type: | duration

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- Definition Number of interest rate derivative instruments held by the entity at the reporting date. + 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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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |