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DEBT (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 6 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 6 Months Ended | 0 Months Ended | 12 Months Ended | 1 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014 | Jan. 09, 2015 | Feb. 28, 2015 item | Jul. 09, 2014 | Mar. 02, 2015 | Jan. 07, 2015 | Aug. 29, 2013 item | Dec. 31, 2014 | Oct. 08, 2014 installment | Apr. 01, 2014 | Feb. 28, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Aug. 31, 2012 facility | Dec. 21, 2011 | Jan. 26, 2009 | Jul. 20, 2007 | Sep. 30, 2007 | Dec. 31, 2011 | Aug. 01, 2012 | Aug. 12, 2010 | Aug. 20, 2010 | May 09, 2013 | Mar. 18, 2010 | Nov. 30, 2010 | Aug. 30, 2013 installment | Sep. 04, 2013 | Dec. 03, 2013 installment | Oct. 24, 2014 | Dec. 30, 2014 | Jul. 27, 2010 | Feb. 20, 2007 facility | Sep. 30, 2010 item | Apr. 16, 2010 | Dec. 23, 2013
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current portion | $ (34,324)us-gaap_LinesOfCreditCurrent | $ (34,324)us-gaap_LinesOfCreditCurrent |  |  |  |  |  |  | $ (34,324)us-gaap_LinesOfCreditCurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 395,811 us-gaap_LongTermDebtNoncurrent | 395,811 us-gaap_LongTermDebtNoncurrent |  |  |  |  |  |  | 395,811 us-gaap_LongTermDebtNoncurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  | 131,017 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rates on debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective Interest Rate (as a percent) | 3.60%us-gaap_DebtInstrumentInterestRateDuringPeriod |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Range of Interest Rates, minimum (excluding impact of swaps and unused commitment fees) (as a percent) | 2.73%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Range of Interest Rates, maximum (excluding impact of swaps and unused commitment fees) (as a percent) | 3.76%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change of Control |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest held (as a percent) | 30.00%gnk_PercentageOfOwnershipInterestHeld / us-gaap_RangeAxis = us-gaap_MinimumMember | 30.00%gnk_PercentageOfOwnershipInterestHeld / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  | 30.00%gnk_PercentageOfOwnershipInterestHeld / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate voting power held (as a percent) | 30.00%gnk_PercentageOfVotingInterestHeldByParent / us-gaap_RangeAxis = us-gaap_MinimumMember | 30.00%gnk_PercentageOfVotingInterestHeldByParent / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  | 30.00%gnk_PercentageOfVotingInterestHeldByParent / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change of Control |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest held by Parent (as a percent) | 10.00%gnk_PercentageOfOwnershipInterestHeldByParent / us-gaap_RangeAxis = us-gaap_MaximumMember | 10.00%gnk_PercentageOfOwnershipInterestHeldByParent / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  | 10.00%gnk_PercentageOfOwnershipInterestHeldByParent / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2007 Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final payment amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 381,182 gnk_LineOfCreditFacilityPaymentAmountDueAtMaturity / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of letters of outstanding | 0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member | 0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member |  |  |  |  |  |  | 0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2007 Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of EBITDA to interest expense | 2 gnk_LineOfCreditFacilityCovenantRatioOfEBITDAToInterestExpense / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MinimumMember | 2 gnk_LineOfCreditFacilityCovenantRatioOfEBITDAToInterestExpense / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  | 2 gnk_LineOfCreditFacilityCovenantRatioOfEBITDAToInterestExpense / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$100 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total | 67,792 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember | 67,792 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  | 67,792 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels mortgaged | 5 gnk_NumberOfVesselsMortgaged / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember | 5 gnk_NumberOfVesselsMortgaged / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  | 5 gnk_NumberOfVesselsMortgaged / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remedy period available to post additional collateral or reduce the amount of the revolving loans and/or letters of credit outstanding |  |  | 30 days | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral security maintenance test (as a percent) |  |  |  | 130.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maintained Aggregate fair market value of the mortgaged vessels as a percentage of aggregate outstanding principal amount (as a percent) |  |  |  | 122.40%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountActual / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization payment |  |  |  | 5,150 gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsShortfallOnAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of unencumbered vessels adding as additional collateral to cover the shortfall of fair value |  |  |  | 1 gnk_NumberOfUnencumberedAssetsAddingAsAdditionalCollateralToCoverShortfall / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  | 7,692 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 | 37,024 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember | 37,024 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  | 37,024 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$100 Million Term Loan Facility | Amended and Restated Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Paydown of debt |  |  |  |  | 1,923 us-gaap_RepaymentsOfDebt / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_AmendedAndRestatedCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum cash balance required per vessel owned |  |  |  |  | 750 gnk_LineOfCreditFacilityMinimumCashBalanceRequiredPerVesselOwned / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_AmendedAndRestatedCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$253 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total | 165,568 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 165,568 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 165,568 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 253,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 253,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 253,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Drawdowns during the period |  | 253,000 us-gaap_ProceedsFromLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash | 9,750 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 9,750 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 9,750 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral security maintenance test (as a percent) | 135.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 135.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 135.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maintained Aggregate fair market value of the mortgaged vessels as a percentage of aggregate outstanding principal amount (as a percent) |  | 130.70%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountActual / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 134.80%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountActual / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 20,300 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 | 84,368 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember | 84,368 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  | 84,368 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$253 Million Term Loan Facility | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment of the outstanding indebtedness |  |  |  |  |  | 216 gnk_PrepaymentOfOutstandingDebt / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization payment |  |  | 5,075 gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsShortfallOnAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$253 Million Term Loan Facility | Amended and Restated Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Paydown of debt |  |  |  |  | 5,075 us-gaap_RepaymentsOfDebt / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_AmendedAndRestatedCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum cash balance required per vessel owned |  |  |  |  | 750 gnk_LineOfCreditFacilityMinimumCashBalanceRequiredPerVesselOwned / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_AmendedAndRestatedCreditFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
$100 Million and $253 Million Term Loan Facilities | Amended and Restated Credit Facility | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable | 3.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityAndSeniorSecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_AmendedAndRestatedCreditFacilityMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2010 Baltic Trading Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total | 102,250 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member | 102,250 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  | 102,250 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  | 102,250 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available working capital borrowings | 7,750 gnk_LineOfCreditFacilityBorrowingsForWorkingCapitalMaximum / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member | 7,750 gnk_LineOfCreditFacilityBorrowingsForWorkingCapitalMaximum / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  | 7,750 gnk_LineOfCreditFacilityBorrowingsForWorkingCapitalMaximum / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining borrowing capacity | 7,750 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member | 7,750 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  | 7,750 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 4,378 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member | 4,378 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  | 4,378 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 9,787 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member | 9,787 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  | 9,787 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | 9,787 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member | 9,787 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  | 9,787 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 | 78,298 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member | 78,298 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  | 78,298 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2010 Baltic Trading Credit Facility | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive semi-annual reductions in total commitment |  |  |  |  |  |  |  | 3 gnk_LineOfCreditFacilityNumberOfConsecutiveSemiAnnualReductionsInMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2010 Baltic Trading Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents and undrawn amount available for working capital required to be maintained |  |  |  |  |  |  |  |  | 750 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated net worth threshold, base amount | 232,796 gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdBaseAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember | 232,796 gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdBaseAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  | 232,796 gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdBaseAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated net worth threshold, percentage of the value of any subsequent primary equity offerings (as a percent) | 50.00%gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdPercentageOfValueOfAnySubsequentPrimaryEquityOfferings / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember | 50.00%gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdPercentageOfValueOfAnySubsequentPrimaryEquityOfferings / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  | 50.00%gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdPercentageOfValueOfAnySubsequentPrimaryEquityOfferings / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral security maintenance test (as a percent) | 140.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember | 140.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  | 140.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $22 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total | 20,125 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember | 20,125 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  | 20,125 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 22,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember | 22,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  | 22,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining borrowing capacity | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  | 1,500 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 | 14,125 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember | 14,125 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  | 14,125 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $22 Million Term Loan Facility | Baltic Fox and Baltic Hare |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents and undrawn amount available for working capital required to be maintained |  | 750 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / gnk_VesselsByNameAxis = gnk_BalticFoxAndBalticHareMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum cash required to be maintained by each collateralized vessel | 500 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / gnk_VesselsByNameAxis = gnk_BalticFoxAndBalticHareMember | 500 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / gnk_VesselsByNameAxis = gnk_BalticFoxAndBalticHareMember |  |  |  |  |  |  | 500 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / gnk_VesselsByNameAxis = gnk_BalticFoxAndBalticHareMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $44 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total | 41,250 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember | 41,250 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  | 41,250 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 44,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember | 44,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  | 44,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents and undrawn amount available for working capital required to be maintained |  | 750 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of prepayments to have liens released |  | 18,000 gnk_AmountOfPrepaymentsToHaveLiensReleased / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining borrowing capacity | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  | 2,750 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 | 30,250 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember | 30,250 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  | 30,250 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $44 Million Term Loan Facility | Baltic Tiger and Baltic Lion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum cash required to be maintained by each collateralized vessel | 1,000 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / gnk_VesselsByNameAxis = gnk_BalticTigerAndBalticLionMember | 1,000 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / gnk_VesselsByNameAxis = gnk_BalticTigerAndBalticLionMember |  |  |  |  |  |  | 1,000 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / gnk_VesselsByNameAxis = gnk_BalticTigerAndBalticLionMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading 2014 Term Loan Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total | 33,150 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 33,150 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 33,150 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining borrowing capacity | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 0 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum cash required to be maintained by each collateralized vessel | 750 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 750 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 750 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of facilities |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum facility amount of delivered cost per vessel (as a percent) |  |  |  |  |  |  |  |  |  | 60.00%gnk_MaximumPercentageOfDeliveredCostPerVesselAllowedUnderCreditFacility / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum facility amount of fair market value per vessel at delivery (as a percent) |  |  |  |  |  |  |  |  |  | 60.00%gnk_MaximumPercentageOfFairMarketValueOfVesselAllowedUnderCreditFacility / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum facility amount of delivered cost per vessel |  |  |  |  |  |  |  |  |  | 16,800 gnk_MaximumCostPerVesselAllowedUnderCreditFacility / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding principal plus interest insured |  |  |  |  |  |  |  |  |  | 95.00%gnk_PercentageOfOutstandingPrincipalPlusInterestInsuredBySinosure / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of semi-annual installments in which the credit facility is to be repaid |  |  |  |  |  |  |  |  |  | 20 gnk_LineOfCreditFacilityNumberOfSemiAnnualInstallments / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount due per installment (as a percent) |  |  |  |  |  |  |  |  |  | 4.16%gnk_PercentageOfFacilityAmountDuePerInstallment / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balloon payment of facility amount due at maturity (as a percent) |  |  |  |  |  |  |  |  |  | 16.67%gnk_PercentageOfFacilityAmountDueAsBalloonPaymentAtMaturity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate fair market value of the mortgaged vessels as a percentage of amount outstanding (as a percent) |  |  |  |  |  |  |  |  |  | 135.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountForPeriodOne / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of the outstanding debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 2,081 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 2,081 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 2,081 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 2,763 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Thereafter | 20,017 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember | 20,017 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  | 20,017 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading 2014 Term Loan Facilities | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable |  |  |  |  |  |  |  |  |  | 2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  | three or six-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading 2014 Term Loan Facilities | Baltic Hornet |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  | 16,800 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember / gnk_VesselsByNameAxis = gnk_BalticHornetMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of drawdown per tranche |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,800 gnk_LineOfCreditFacilityDrawdownAmount / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember / gnk_VesselsByNameAxis = gnk_BalticHornetMember |  |  |  |  |  |
Period after latest vessel delivery date for first periodic repayment |  |  |  |  |  |  |  |  |  | 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading 2014 Term Loan Facilities | Baltic Wasp |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  | 16,800 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember / gnk_VesselsByNameAxis = gnk_BalticWaspMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of drawdown per tranche |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,350 gnk_LineOfCreditFacilityDrawdownAmount / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityThreeMember / gnk_VesselsByNameAxis = gnk_BalticWaspMember |  |  |  |  |
Period after latest vessel delivery date for first periodic repayment |  |  |  |  |  |  |  |  |  | 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $148 Million Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 148,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember | 148,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  |  |  | 148,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee on unused daily average unutilized commitment (as a percent) |  | 1.20%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount aggregate outstanding term loan due per installment (as a percent) |  | 1.67%gnk_PercentageOfAggregateOutstandingTermLoanFacilityAmountDuePerInstallment / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels mortgaged | 9 gnk_NumberOfVesselsMortgaged / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember | 9 gnk_NumberOfVesselsMortgaged / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  |  |  | 9 gnk_NumberOfVesselsMortgaged / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Drawdowns during the period |  | 0 us-gaap_ProceedsFromLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  | 104,500 us-gaap_ProceedsFromLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Consecutive Quarterly Reductions in Maximum Borrowing Capacity |  | 2,447 gnk_AmountOfConsecutiveQuarterlyReductionsInMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum period for future time charter contracts to be secured under lien |  |  |  |  |  |  |  |  | 36 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $148 Million Credit Facility | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable |  | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = gnk_TermLoanFacilityFourMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $115 Million Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 115,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_RevolvingCreditFacility2014Member | 115,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_RevolvingCreditFacility2014Member |  |  |  |  |  |  | 115,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_RevolvingCreditFacility2014Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $33 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | 33,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFiveFacilityMember | 33,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFiveFacilityMember |  |  |  |  |  |  | 33,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_TermLoanFiveFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of single term loans |  |  |  |  |  |  |  |  | 2 gnk_NumberOfSingleTermLoans / us-gaap_CreditFacilityAxis = gnk_TermLoanFiveFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels purchased by using term loan finance |  |  |  |  |  |  |  |  | 2 gnk_NumberOfAssetsAcquiredByFinancingThroughTermLoans / us-gaap_CreditFacilityAxis = gnk_TermLoanFiveFacilityMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $33 Million Term Loan Facility | Baltic Scorpion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum facility amount of delivered cost per vessel |  | 16,500 gnk_MaximumCostPerVesselAllowedUnderCreditFacility / us-gaap_CreditFacilityAxis = gnk_TermLoanFiveFacilityMember / gnk_VesselsByNameAxis = gnk_BalticScorpionMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading $33 Million Term Loan Facility | Baltic Mantis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum facility amount of delivered cost per vessel |  |  |  |  |  |  |  |  | 16,500 gnk_MaximumCostPerVesselAllowedUnderCreditFacility / us-gaap_CreditFacilityAxis = gnk_TermLoanFiveFacilityMember / gnk_VesselsByNameAxis = gnk_BalticMantisMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total | 300 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember | 300 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember |  |  |  |  |  |  | 300 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash | 300 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember | 300 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember |  |  |  |  |  |  | 300 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee on letter of credit (as a percent) |  | 1.00%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of credit | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notice period for cancellation of line of credit |  | 150 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current portion |  |  |  |  |  |  |  |  |  |  |  |  | (1,316,439)us-gaap_LinesOfCreditCurrent / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  |  |  | 163,625 us-gaap_LongTermDebtNoncurrent / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current interest payable |  |  |  |  |  |  |  |  |  |  |  |  | 13,199 us-gaap_InterestPayableCurrent / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of days after year end audited financial statements are to be furnished to lenders |  |  |  |  |  |  |  |  |  |  | 90 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  | 118,588 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  |  |  |  |  |  |  |  |  |  | 7,500,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  | 7,500,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Drawdowns during the period |  |  |  |  |  |  |  |  |  |  |  |  | 1,000 us-gaap_ProceedsFromLinesOfCredit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rates on debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective Interest Rate (as a percent) |  |  |  |  | 4.19%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  | 4.70%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 4.68%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Range of Interest Rates, minimum (excluding impact of swaps and unused commitment fees) (as a percent) |  |  |  |  | 3.15%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  | 3.16%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 3.21%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Range of Interest Rates, maximum (excluding impact of swaps and unused commitment fees) (as a percent) |  |  |  |  | 5.15%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  | 4.38%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 4.63%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | August 2012 Credit Facility Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of interest-bearing indebtedness to the sum of interest-bearing indebtedness and consolidated net worth (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62.50%gnk_DebtInstrumentCovenantRatioOfGrossInterestBearingDebtToTotalCapitalMaximum / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of credit facilities with prepaid scheduled amortization payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 gnk_LineOfCreditFacilityNumberWithPrepaidScheduledAmortizationPayments / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount to be paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 55,193 gnk_LineOfCreditFacilityPrincipalPortionOfFirstScheduledPaymentAfterAmendment / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of credit facilities that will not increase the amount of principal indebtedness outstanding or change their maturity dates |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 gnk_LineOfCreditFacilityNumberNotIncreasingIndebtednessOrChangingMaturityDates / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of credit facilities with vessels pledged being granted a second priority security interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 gnk_LineOfCreditFacilityNumberWithVesselsPledgedAndGrantedSecondPrioritySecurityInterest / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of credit facilities in which the consenting lenders received an upfront fee |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 gnk_LineOfCreditFacilityNumberWithConsentingLendersReceivingUpfrontFee / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of upfront fee received by consenting lenders (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.25%gnk_LineOfCreditFacilityUpfrontFeePercentage / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | August 2012 Credit Facility Agreements | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of indebtedness allowed to be incurred for vessel acquisitions as percentage of the lesser of the vessel acquisition cost or fair market value (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00%gnk_LineOfCreditFacilityIndebtednessToBeIncurredForVesselAcquisitionAsPercentageOfLesserOfVesselAcquisitionCostOrFairMarketValue / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | December 2011 Credit Facility Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of interest-bearing indebtedness to the sum of interest-bearing indebtedness and consolidated net worth (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62.50%gnk_DebtInstrumentCovenantRatioOfGrossInterestBearingDebtToTotalCapitalMaximum / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of upfront fee received by consenting lenders (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.25%gnk_LineOfCreditFacilityUpfrontFeePercentage / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of credit facilities not subject to facility fee |  |  |  |  |  |  |  |  |  |  |  | 2 gnk_LineOfCreditFacilityNumberNotSubjectToNewFacilityFee / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2010 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of days after notice from trustee to cure default |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on convertible notes (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleNotesPayableMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |
Predecessor | 2007 Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total |  |  |  |  |  |  |  |  |  |  |  |  | 1,055,912 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period collateral was pledged prior to effective date of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable, before increase (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00%gnk_DebtInstrumentBasisSpreadOnVariableRateBeforeAmendment / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 0.85%gnk_DebtInstrumentBasisSpreadOnVariableRateBeforeAmendment / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  | 118,588 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  | 102,500 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of credit facilities terminated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 gnk_LineOfCreditFacilityTerminatedNumber / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Three-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee on unused daily average unutilized commitment (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.70%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 0.20%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 0.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum percentage of en bloc purchase price which may be financed by loans (as a percent) |  |  |  |  | 100.00%gnk_DebtInstrumentMaximumPercentageOfSignificantAcquisitionPurchasePriceThatMayBeFinancedWithProceeds / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  | 1,111,000 us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels mortgaged |  |  |  |  | 35 gnk_NumberOfVesselsMortgaged / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remedy period available to post additional collateral or reduce the amount of the revolving loans and/or letters of credit outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of letters of outstanding |  |  |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | Subsidiary guarantors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels in the fleet |  |  |  |  | 9 gnk_NumberOfVesselsInFleet / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | Period from March 31, 2009 through March 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,500 gnk_LineOfCreditFacilityDecreaseInMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / gnk_LineOfCreditPeriodicPaymentsEffectiveDateAxis = gnk_LineOfCreditPeriodicPaymentsPeriodBeginningFrom31March2009Through31March2012Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | Period from June 30, 2012 through July 20, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48,195 gnk_LineOfCreditFacilityDecreaseInMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / gnk_LineOfCreditPeriodicPaymentsEffectiveDateAxis = gnk_LineOfCreditPeriodicPaymentsPeriodBeginningFrom30June2012Through20July2017Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | One-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capacity of vessels |  |  |  |  | 25,000 gnk_CapacityOfVesselsInDeadweightTonnage / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated net worth threshold, base amount |  |  |  |  | 263,300 gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdBaseAmount / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated net worth threshold, percentage of the value of any subsequent primary equity offerings (as a percent) |  |  |  |  | 80.00%gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdPercentageOfValueOfAnySubsequentPrimaryEquityOfferings / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated net worth based on equity offerings completed |  |  |  |  | 674,555 us-gaap_MinimumNetWorthRequiredForCompliance / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral security maintenance test (as a percent) |  |  |  |  | 130.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Six-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capacity of vessels |  |  |  |  | 180,000 gnk_CapacityOfVesselsInDeadweightTonnage / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Age of drybulk carriers at the time of delivery |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Age of drybulk carriers at the time of maturity of the credit facility |  |  |  |  | 18 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available working capital borrowings |  |  |  |  | 50,000 gnk_LineOfCreditFacilityBorrowingsForWorkingCapitalMaximum / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated leverage ratio |  |  |  |  | 5.5 gnk_LineOfCreditFacilityCovenantConsolidatedLeverageRatio / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | August 2012 Credit Facility Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum cash balances necessary to repay credit facility on a quarterly basis commencing September 30, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 gnk_LineOfCreditFacilityMinimumCashBalanceForRepayment / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of repayments commencing September 30, 2012 to be allocated to the final payment at maturity (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00%gnk_LineOfCreditFacilityPercentageOfRepaymentsToBeAllocatedToFinalPaymentAtMaturity / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of repayments commencing September 30, 2012 to be allocated to the scheduled mandatory principal repayments (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75.00%gnk_LineOfCreditFacilityPercentageOfRepaymentsToBeAllocatedToScheduledMandatoryPrincipalRepayments / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum cash balance required per vessel mortgaged, before increase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500 gnk_LineOfCreditFacilityMinimumCashBalanceRequiredPerVesselMortgagedBeforeAmendment / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents and undrawn amount available for working capital required to be maintained |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 750 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57,893 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment fee (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.25%gnk_LineOfCreditFacilityPrepaymentFeePercentage / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,199 gnk_InterestPayableNoncurrent / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | August 2012 Credit Facility Agreements | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable, before increase (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00%gnk_DebtInstrumentBasisSpreadOnVariableRateBeforeAmendment / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | August 2012 Credit Facility Agreements | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Appraised value of certain mortgaged vessels as percentage of the aggregate principal amount for ceasing of mandatory payment obligations (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%gnk_LineOfCreditFacilityAppraisedValueOfMortgagedVesselsRequiredAsPercentageOfAggregatePrincipalAmountForCeasingOfMandatoryPaymentObligations / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | August 2012 Credit Facility Agreements | Current Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current interest payable |  |  |  |  |  |  |  |  |  |  |  |  | 13,199 us-gaap_InterestPayableCurrent / us-gaap_BalanceSheetLocationAxis = gnk_CurrentLiabilitiesMember / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2007 Credit Facility | December 2011 Credit Facility Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,500 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility fee (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00%gnk_LineOfCreditFacilityFeePercentage / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reduction in facility fee if equity offering results in desired gross proceeds (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 1.00%gnk_LineOfCreditFacilityFeeReductionPercentageIfEquityOfferingResultsInDesiredGrossProceeds / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock (in shares) |  |  |  |  |  |  |  |  |  |  |  | 7,500,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_CreditFacilityAxis = gnk_CreditFacility2007Member / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $100 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total |  |  |  |  |  |  |  |  |  |  |  |  | 75,484 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 gnk_NumberOfVesselsToBeAcquiredUnderPurchaseAgreement / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Three-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee on unused daily average unutilized commitment (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.35%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of drawdowns |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 gnk_LineOfCreditFacilityNumberOfDrawdowns / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of drawdown per tranche |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,000 gnk_LineOfCreditFacilityDrawdownAmount / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of drawdowns per vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 gnk_LineOfCreditFacilityNumberOfDrawdownsPerVessel / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity term from the date of the first drawdown |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Profile for Amortization Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $100 Million Term Loan Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | One-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $100 Million Term Loan Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Six-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $100 Million Term Loan Facility | August 2012 Credit Facility Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,538 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $100 Million Term Loan Facility | December 2011 Credit Facility Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_SecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $253 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total |  |  |  |  |  |  |  |  |  |  |  |  | 180,793 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  | 253,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 253,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  | 253,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13 gnk_NumberOfVesselsToBeAcquiredUnderPurchaseAgreement / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee on unused daily average unutilized commitment (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Number of drawdowns |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13 gnk_LineOfCreditFacilityNumberOfDrawdowns / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Number of drawdowns per vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 gnk_LineOfCreditFacilityNumberOfDrawdownsPerVessel / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels owned by each of the entity's wholly-owned ship-owning subsidiaries who act as guarantors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 gnk_NumberOfVesselsOwnedByWhollyOwnedShipOwningSubsidiariesWhichProvideDebtGuarantee / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels delivered pursuant to the agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 gnk_NumberOfVesselsUnderOptionToPurchase / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |
Restricted cash |  |  |  |  |  |  |  |  |  |  |  |  | 9,750 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $253 Million Term Loan Facility | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for condition one (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00%gnk_ApplicableMarginOverReferenceRateForConditionOne / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $253 Million Term Loan Facility | August 2012 Credit Facility Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 253,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,450 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_August2012CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | $253 Million Term Loan Facility | December 2011 Credit Facility Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 253,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_SeniorSecuredTermLoanFacilityMember / us-gaap_DebtInstrumentAxis = gnk_December2011CreditFacilityAgreementsMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2010 Baltic Trading Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total |  |  |  |  |  |  |  |  |  |  |  |  | 102,250 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | 110,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  | 100,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Commitment fee on unused daily average unutilized commitment (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |
Available working capital borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,000 gnk_LineOfCreditFacilityBorrowingsForWorkingCapitalMaximum / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Drawdowns during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000 us-gaap_ProceedsFromLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |
Payment of upfront fees |  |  |  |  |  |  |  | 275 gnk_LineOfCreditFacilityPaymentOfUpfrontFee / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of semi-annual reductions in maximum borrowing capacity through the maturity date |  |  |  |  |  |  |  | 5,000 gnk_LineOfCreditFacilityAmountOfSemiAnnualReductionsInMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of maximum facility amount to aggregate appraised value of vessels mortgaged (as a percent) |  |  |  |  |  |  |  | 55.00%gnk_RatioOfMaximumFacilityAmountToAggregateAppraisedValueOfVesselsMortgaged / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2010 Baltic Trading Credit Facility | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for condition one (as a percent) |  |  |  |  |  |  |  | 3.00%gnk_ApplicableMarginOverReferenceRateForConditionOne / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for condition two (as a percent) |  |  |  |  |  |  |  | 3.35%gnk_ApplicableMarginOverReferenceRateForConditionTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2010 Baltic Trading Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents and undrawn amount available for working capital required to be maintained |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000 gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalRequiredToBeMaintained / us-gaap_CreditFacilityAxis = gnk_BalticTradingCreditFacility2010Member / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |
Predecessor | 2010 Baltic Trading Credit Facility | Minimum | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Three-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | 2010 Baltic Trading Credit Facility | Maximum | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Six-month LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | Baltic Trading $22 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total |  |  |  |  |  |  |  |  |  |  |  |  | 21,625 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | 22,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  | 22,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Final payment amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,375 gnk_LineOfCreditFacilityPaymentAmountDueAtMaturity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Commitment fee on unused daily average unutilized commitment (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Consolidated net worth threshold, base amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 232,796 gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdBaseAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Consolidated net worth threshold, percentage of the value of any subsequent primary equity offerings (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00%gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdPercentageOfValueOfAnySubsequentPrimaryEquityOfferings / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Number of quarterly installments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23 gnk_LineOfCreditFacilityNumberOfQuarterlyInstallments / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Amount of periodic payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 375 us-gaap_LineOfCreditFacilityPeriodicPayment / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Period after latest vessel delivery date for first periodic repayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 months |  |  |  |  |  |  |  |  |
Maximum ratio of financial indebtedness to total assets (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70.00%gnk_LineOfCreditFacilityLeverageCovenantMaximumRatioOfFinancialIndebtednessToTotalAssets / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Aggregate fair market value of the mortgaged vessels as a percentage of amount outstanding (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 130.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountForPeriodOne / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Aggregate fair market value of the mortgaged vessels as a percentage of amount outstanding after August 30, 2016 (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 135.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountForPeriodTwo / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |
Predecessor | Baltic Trading $22 Million Term Loan Facility | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.35%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three-month LIBOR |  |  |  |  |  |  |  |  |
Predecessor | Baltic Trading $22 Million Term Loan Facility | Baltic Hare |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Drawdowns during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,730 us-gaap_ProceedsFromLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / gnk_VesselsByNameAxis = gnk_BalticHareMember |  |  |  |  |  |  |  |
Predecessor | Baltic Trading $22 Million Term Loan Facility | Baltic Fox |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Drawdowns during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,270 us-gaap_ProceedsFromLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityOneMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / gnk_VesselsByNameAxis = gnk_BalticFoxMember |  |  |  |  |  |  |  |
Predecessor | Baltic Trading $44 Million Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total |  |  |  |  |  |  |  |  |  |  |  |  | 44,000 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  | 44,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 44,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Applicable margin over reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.35%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Final payment amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28,188 gnk_LineOfCreditFacilityPaymentAmountDueAtMaturity / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Reference rate for interest payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Three-month LIBOR |  |  |  |  |  |  |
Commitment fee on unused daily average unutilized commitment (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.75%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Consolidated net worth threshold, base amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 232,796 gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdBaseAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Consolidated net worth threshold, percentage of the value of any subsequent primary equity offerings (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00%gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdPercentageOfValueOfAnySubsequentPrimaryEquityOfferings / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Number of quarterly installments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23 gnk_LineOfCreditFacilityNumberOfQuarterlyInstallments / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Amount of periodic payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 688 us-gaap_LineOfCreditFacilityPeriodicPayment / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Period after latest vessel delivery date for first periodic repayment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 months |  |  |  |  |  |  |
Collateral security maintenance test (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125.00%gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Maximum ratio of financial indebtedness to total assets (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70.00%gnk_LineOfCreditFacilityLeverageCovenantMaximumRatioOfFinancialIndebtednessToTotalAssets / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |
Predecessor | Baltic Trading $44 Million Term Loan Facility | Baltic Tiger |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of drawdown per tranche |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,400 gnk_LineOfCreditFacilityDrawdownAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / gnk_VesselsByNameAxis = gnk_BalticTigerMember
Predecessor | Baltic Trading $44 Million Term Loan Facility | Baltic Lion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of drawdown per tranche |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,600 gnk_LineOfCreditFacilityDrawdownAmount / us-gaap_CreditFacilityAxis = gnk_BalticTradingTermLoanFacilityTwoMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / gnk_VesselsByNameAxis = gnk_BalticLionMember
Predecessor | 2005 Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  | 206,233 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_CreditFacility2005Member / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | Short-Term Line |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of Credit Facility |  |  |  |  | 77,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = gnk_ShortTermCreditFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | Standby letters of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | 50,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Predecessor | Letter of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit, Total |  |  |  |  |  |  |  |  |  |  |  |  | 300 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash |  |  |  |  |  |  |  |  |  |  |  |  | $ 300 us-gaap_RestrictedCashAndCashEquivalents / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letter of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee on letter of credit (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 1.00%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Represents the age of drybulk carriers at the time of delivery. + References No definition available. + Details
Name: | gnk_AgeOfVesselsAtTimeOfDelivery
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the age of drybulk carriers at the time of maturity of the credit facility. + References No definition available. + Details
Name: | gnk_AgeOfVesselsAtTimeOfMaturityOfCreditFacility
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of the quarterly reductions in the maximum borrowing capacity which will occur through the maturity date of the credit facility. + References No definition available. + Details
Name: | gnk_AmountOfConsecutiveQuarterlyReductionsInMaximumBorrowingCapacity
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the minimum prepayment amount to have the lien released on the vessel. + References No definition available. + Details
Name: | gnk_AmountOfPrepaymentsToHaveLiensReleased
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Applicable margin over reference rate if ratio of maximum facility amount to aggregate appraised value of vessels mortgaged is 55% or less. + References No definition available. + Details
Name: | gnk_ApplicableMarginOverReferenceRateForConditionOne
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Applicable margin over reference rate if ratio of maximum facility amount to aggregate appraised value of vessels mortgaged is above 55%. + References No definition available. + Details
Name: | gnk_ApplicableMarginOverReferenceRateForConditionTwo
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the capacity of vessels expressed in deadweight tonnage (dwt), a measure of weight a ship is carrying or can safely carry. + References No definition available. + Details
Name: | gnk_CapacityOfVesselsInDeadweightTonnage
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | gnk_ChangeOfControlAbstract
Namespace Prefix: | gnk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage points added to the reference rate to compute the variable rate on the debt instrument before amendment. + References No definition available. + Details
Name: | gnk_DebtInstrumentBasisSpreadOnVariableRateBeforeAmendment
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the maximum ratio of the entity's interest-bearing debt to the sum of its interest-bearing debt and consolidated net worth measured on the last day of any fiscal quarter which is allowable under the terms of the debt instrument covenants. + References No definition available. + Details
Name: | gnk_DebtInstrumentCovenantRatioOfGrossInterestBearingDebtToTotalCapitalMaximum
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the maximum percentage of the purchase price of a significant acquisition which may be financed with proceeds from debt instrument. + References No definition available. + Details
Name: | gnk_DebtInstrumentMaximumPercentageOfSignificantAcquisitionPurchasePriceThatMayBeFinancedWithProceeds
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of noncurrent portion of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. + References No definition available. + Details
Name: | gnk_InterestPayableNoncurrent
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of years the profile is based on for which the outstanding principle of this loan is amortized. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityAmortizationPeriodOfPrincipalAmount
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of the semi-annual reductions in the maximum borrowing capacity which will occur through the maturity date of the line of credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityAmountOfSemiAnnualReductionsInMaximumBorrowingCapacity
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the appraised value of mortgaged vessels required as percentage of the aggregate principal amount of obligations under credit facility for ceasing of mandatory payment obligations. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityAppraisedValueOfMortgagedVesselsRequiredAsPercentageOfAggregatePrincipalAmountForCeasingOfMandatoryPaymentObligations
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum amount of borrowings on the line of credit facility which may be used for working capital purposes. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityBorrowingsForWorkingCapitalMaximum
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the minimum cash required per vessel mortgaged under this facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalPerVesselRequiredToBeMaintained
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the cash and cash equivalents and undrawn amount available for working capital required be maintained under the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantCashAndCashEquivalentAndRemainingBorrowingCapacityForWorkingCapitalRequiredToBeMaintained
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the ratio of consolidated total debt to consolidated adjusted earnings before, interest, taxes, depreciation and amortization allowed under the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantConsolidatedLeverageRatio
Namespace Prefix: | gnk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the consolidated net worth threshold amount calculated as per the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdBaseAmount
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the percentage of the value of any subsequent primary equity offerings that is used in the calculation of consolidated net worth threshold amount as per the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantConsolidatedNetWorthThresholdPercentageOfValueOfAnySubsequentPrimaryEquityOfferings
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the aggregate fair value of the mortgaged vessels to be maintained as a percentage of aggregate outstanding principal amount as per the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmount
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the aggregate fair value of the mortgaged vessels actual as a percentage of aggregate outstanding principal amount as per the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountActual
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the aggregate fair value of the mortgaged vessels to be maintained as a percentage of aggregate outstanding principal amount as per the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountForPeriodOne
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the aggregate fair value of the mortgaged vessels to be maintained as a percentage of aggregate outstanding principal amount after August 30, 2016 as per the terms of the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsAsPercentageOfAggregateOutstandingPrincipalAmountForPeriodTwo
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of short fall in fair value of mortgaged assets. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantFairMarketValueOfMortgagedVesselsShortfallOnAggregateOutstandingPrincipalAmount
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the ratio of EBITDA (earnings before interest, taxes, depreciation and amortization) to interest expense required to be maintained under the credit facilities' covenants. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityCovenantRatioOfEBITDAToInterestExpense
Namespace Prefix: | gnk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The decrease in the maximum borrowing capacity under the line of credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityDecreaseInMaximumBorrowingCapacity
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of the drawdown on the line of credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityDrawdownAmount
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the percentage of facility fee on the average daily outstanding principal amount of the loans outstanding. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityFeePercentage
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the reduction in facility fee if equity offering results in desired gross proceeds. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityFeeReductionPercentageIfEquityOfferingResultsInDesiredGrossProceeds
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of indebtedness allowed to be incurred for vessel acquisitions as a percentage of the lesser of the vessel acquisition cost or fair market value. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityIndebtednessToBeIncurredForVesselAcquisitionAsPercentageOfLesserOfVesselAcquisitionCostOrFairMarketValue
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents maximum ratio of financial indebtedness to total assets under the terms of the credit facility leverage covenant. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityLeverageCovenantMaximumRatioOfFinancialIndebtednessToTotalAssets
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum amount of cash balances necessary for quarterly repayments on the credit facility under the terms of the agreement. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityMinimumCashBalanceForRepayment
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the minimum cash balance per vessel required to be maintained under the credit facility, before amendment. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityMinimumCashBalanceRequiredPerVesselMortgagedBeforeAmendment
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the minimum cash balance per vessel required to be maintained for vessels owned under the credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityMinimumCashBalanceRequiredPerVesselOwned
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the notice period for cancellation of line of credit. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNoticePeriodForCancellation
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of credit facilities that will not increase the amount of principal indebtedness outstanding or change their maturity dates. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberNotIncreasingIndebtednessOrChangingMaturityDates
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of credit facilities, which are not subject to new facility fee. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberNotSubjectToNewFacilityFee
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of consecutive semi-annual reductions in maximum borrowing capacity under the line of credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberOfConsecutiveSemiAnnualReductionsInMaximumBorrowingCapacity
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of draws made as of the reporting date. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberOfDrawdowns
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of draws per vessel made as of the reporting date. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberOfDrawdownsPerVessel
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of quarterly installments in which the line of credit facility shall be repaid. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberOfQuarterlyInstallments
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of quarterly installments in which the line of each credit facility shall be repaid. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberOfSemiAnnualInstallments
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of credit facilities in which the consenting lenders received an upfront fee. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberWithConsentingLendersReceivingUpfrontFee
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of credit facilities having prepaid scheduled amortization payments which were applied in order of maturity. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberWithPrepaidScheduledAmortizationPayments
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of credit facilities in which the vessels pledged under the facilities were granted a second priority security interest. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityNumberWithVesselsPledgedAndGrantedSecondPrioritySecurityInterest
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the required payment amount under the line of credit facility due on final maturity date. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityPaymentAmountDueAtMaturity
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of upfront fee paid under the terms of credit facilities. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityPaymentOfUpfrontFee
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the percentage of repayments to be allocated to the final payment at maturity under the line of credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityPercentageOfRepaymentsToBeAllocatedToFinalPaymentAtMaturity
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of repayments to be allocated to the scheduled mandatory principal repayments under the line of credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityPercentageOfRepaymentsToBeAllocatedToScheduledMandatoryPrincipalRepayments
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period after latest vessel delivery date for first periodic repayment of the line of credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityPeriodAfterLatestVesselDeliveryDateForFirstPeriodicRepayment
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage fee required to be paid upon maturity under the line of credit facility based on the amount outstanding following the prepayment pursuant to the amendment. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityPrepaymentFeePercentage
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of principal to be paid in the first scheduled payment of the line of credit facility after amendment. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityPrincipalPortionOfFirstScheduledPaymentAfterAmendment
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the maturity term of the credit facility from the date of the first drawdown. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityTermCommencingFromDateOfFirstDrawdown
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of credit facilities terminated upon entry into new credit facility. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityTerminatedNumber
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the upfront fee as a percentage of the amount outstanding under the line of credit facilities paid to consenting lenders. + References No definition available. + Details
Name: | gnk_LineOfCreditFacilityUpfrontFeePercentage
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum delivered cost per vessel allowed under the credit facility. + References No definition available. + Details
Name: | gnk_MaximumCostPerVesselAllowedUnderCreditFacility
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the maximum percentage of delivered cost per vessel allowed under the credit facility. + References No definition available. + Details
Name: | gnk_MaximumPercentageOfDeliveredCostPerVesselAllowedUnderCreditFacility
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum percentage of fair market value per vessel at delivery allowed under the credit facility. + References No definition available. + Details
Name: | gnk_MaximumPercentageOfFairMarketValueOfVesselAllowedUnderCreditFacility
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum contract period for future time charter contracts required to be secured by liens. + References No definition available. + Details
Name: | gnk_MinimumPeriodForFutureTimeCharterContractsRequiredToBeSecuredByLien
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of assets acquired during the period utilizing funds through term loans. + References No definition available. + Details
Name: | gnk_NumberOfAssetsAcquiredByFinancingThroughTermLoans
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of days after notice from trustee the entity is required cure the default of not making the scheduled amortization payment of its Convertible Senior Notes. + References No definition available. + Details
Name: | gnk_NumberOfDaysAfterNoticeFromTrusteeToCureDefault
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of days after year end the audited financial statements are to be furnished to certain lenders to allow discussions to continue without the need to file for bankruptcy relief. + References No definition available. + Details
Name: | gnk_NumberOfDaysAfterYearEndAuditedFinancialStatementsAreToBeFurnishedToLenders
Namespace Prefix: | gnk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of single term loans for finance requirement. + References No definition available. + Details
Name: | gnk_NumberOfSingleTermLoans
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of unencumbered assets adding as additional collateral to cover the shortfall of fair value of mortgaged assets. + References No definition available. + Details
Name: | gnk_NumberOfUnencumberedAssetsAddingAsAdditionalCollateralToCoverShortfall
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of vessels in the fleet. + References No definition available. + Details
Name: | gnk_NumberOfVesselsInFleet
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of vessels mortgaged by the entity as collateral in support of agreements. + References No definition available. + Details
Name: | gnk_NumberOfVesselsMortgaged
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of vessels owned by each of the entity's wholly-owned ship-owning subsidiaries who act as guarantors under debt instrument. + References No definition available. + Details
Name: | gnk_NumberOfVesselsOwnedByWhollyOwnedShipOwningSubsidiariesWhichProvideDebtGuarantee
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of vessels to be acquired by the entity under purchase agreement. + References No definition available. + Details
Name: | gnk_NumberOfVesselsToBeAcquiredUnderPurchaseAgreement
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of vessels under option to purchase pursuant to the purchase agreement. + References No definition available. + Details
Name: | gnk_NumberOfVesselsUnderOptionToPurchase
Namespace Prefix: | gnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents percentage of Amount aggregate outstanding term loan facility due per installment. + References No definition available. + Details
Name: | gnk_PercentageOfAggregateOutstandingTermLoanFacilityAmountDuePerInstallment
Namespace Prefix: | gnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of each facility amount due as ballon payment at final maturity. + References No definition available. + Details
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- Definition Represents percentage of facility amount due per installment. + References No definition available. + Details
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- Definition Represents the percentage of outstanding principal plus interest insured by China Export & Credit Insurance Corporation (Sinosure) to cover political and commercial risks. + References No definition available. + Details
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- Definition Represents the ownership by an other party or group NOT including Genco or certain other permitted shareholders. + References No definition available. + Details
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- Definition Represents the ownership by Genco or certain other permitted shareholders. + References No definition available. + Details
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- Definition Represents the aggregate voting power held by parent. + References No definition available. + Details
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- Definition Represents the period of time the entity pledged collateral for the Credit Facility prior to it's effective date. + References No definition available. + Details
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- Definition Amount of payment made towards outstanding debt during the period. + References No definition available. + Details
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- Definition Represents ratio of maximum facility amount to aggregate appraised value of vessels mortgaged. + References No definition available. + Details
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- Definition Represents the remedy period available to post additional collateral or reduce the amount of the revolving loans and/or letters of credit outstanding under the terms of the credit facilities' covenants. + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition The average effective interest rate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition When presenting a range of interest rates, the highest effective rate for funds borrowed under the debt agreement as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition When presenting a range of interest rates, the lowest effective rate for funds borrowed under the debt agreement as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e7018-107765 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of the required periodic payments of both interest and principal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing 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 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing 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 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing 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 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing 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 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing 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 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing 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 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(a) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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