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STOCK-BASED COMPENSATION (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended | 6 Months Ended | 12 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended |  |  |  |
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Dec. 31, 2013 | Dec. 31, 2012 | Jul. 09, 2014 | Dec. 31, 2014 | Mar. 15, 2010 item | Dec. 31, 2014 | Aug. 07, 2014 | Aug. 06, 2014 | Dec. 18, 2014 | Dec. 19, 2013 | Dec. 13, 2012 | Jul. 05, 2005 | May 17, 2012 | Mar. 13, 2014 | Mar. 03, 2010
Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited/Cancelled (in shares) | (21,500)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (1,500)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
MIP Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total fair value of outstanding awards upon emergence from bankruptcy |  |  |  |  |  |  | 54,436 gnk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingTotalFairValue / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember |  |  |  |  |  |  |  |
Genco Shipping and Trading Limited 2005 Equity Incentive Plan | Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of common stock available for awards |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005EquityIncentivePlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |
2005 and 2012 GS&T Plans | Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of anniversaries in which award vests |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period (in shares) | 1,108,762 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 936,787 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 880,465 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 880,465 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) | 200,634 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 464,175 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Vested (in shares) | (407,431)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (290,700)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (880,465)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |
Forfeited/Cancelled (in shares) | (21,500)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (1,500)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the end of the period (in shares) | 880,465 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,108,762 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Grant Date Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period (in dollars per share) | 9.47 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 14.06 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | $ 7.77 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | $ 7.77 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) | 1.57 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 2.71 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Vested (in dollars per share) | 9.46 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 13.49 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | $ 7.77 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |
Forfeited/Cancelled (in dollars per share) | 5.53 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 6.39 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the end of the period (in dollars per share) | 7.77 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 9.47 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Additional disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total fair value of shares vested | 943 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 733 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 691 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |
Genco Shipping and Trading Limited 2012 Equity Incentive Plan | Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of common stock available for awards |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2012EquityIncentivePlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |
Baltic Trading Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  | 1,086,345 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |  |  |
Vested (in shares) |  |  |  | (525,930)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |  |  |
Balance at the end of the period (in shares) |  |  |  | 1,941,844 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  | 1,941,844 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |
Weighted Average Grant Date Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  | $ 2.61 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |  |  |
Vested (in dollars per share) |  |  |  | $ 7.21 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |  |  |
Balance at the end of the period (in dollars per share) |  |  |  | $ 3.80 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  | $ 3.80 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |
Baltic Trading Plan | Baltic Trading Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of anniversaries in which award vests in connection with IPO |  |  |  |  | 4 gnk_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingInConnectionWithIPOInNumberOfAnniversaries / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |  |
Number of anniversaries in which award vests not in connection with IPO |  |  |  | 4 gnk_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingNotInConnectionWithIPOInNumberOfAnniversaries / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |  |  |
Additional disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total fair value of shares vested |  |  |  |  |  | 1,168 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to nonvested stock awards [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost |  |  |  | 5,273 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  | 5,273 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember |  |  |  |  |  |  |  |  |
Weighted-average period for recognition of unrecognized compensation cost |  |  |  | 3 years 3 months 11 days |  |  |  |  |  |  |  |  |  |  |
Baltic Trading Plan | Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period (in shares) | 664,249 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 545,750 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) | 998,680 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 299,999 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Vested (in shares) | (281,500)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (181,500)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the end of the period (in shares) | 1,381,429 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 664,249 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Grant Date Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period (in dollars per share) | 7.70 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 11.60 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) | 5.60 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 3.04 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Vested (in dollars per share) | 8.48 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 11.71 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the end of the period (in dollars per share) | 6.03 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 7.70 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |  |
Baltic Trading Plan | Predecessor | Baltic Trading Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of common stock available for awards |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 2,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Additional disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total fair value of shares vested | 1,194 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 663 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,143 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_PlanNameAxis = gnk_BalticTradingPlanMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |  |  |  |  |  |  |  |  |  |  |
2014 MIP Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of common stock available for awards |  |  |  | 9,668,061 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | 9,668,061 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | 250,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |
Percentage of common stock outstanding ( In percent) |  |  |  |  |  | 1.80%gnk_PercentageOfSharesInPostEmergenceCommonStockOutstanding / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Volatility rate ( as a percent) |  |  |  |  |  |  | 43.91%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Volatility rate term |  |  |  |  |  |  | 6 years |  |  |  |  |  |  |  |
Risk-free interest rate ( as a percent) |  |  |  |  |  |  | 1.85%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Dividend rate ( as a percent) |  |  |  |  |  |  | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Percentage of warrant vest for anniversaries of the grant date |  |  |  |  |  |  | 33.33%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of anniversaries in which award vests |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  | 1,110,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember | 1,110,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Balance at the end of the period (in shares) |  |  |  | 1,110,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | 1,110,600 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Weighted Average Grant Date Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  |  | $ 20.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Balance at the end of the period (in dollars per share) |  |  |  | $ 20.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | $ 20.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Additional disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total fair value of shares vested |  |  |  |  |  | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to nonvested stock awards [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost |  |  |  | 16,748 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | 16,748 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Weighted-average period for recognition of unrecognized compensation cost |  |  |  | 2 years 7 months 6 days |  |  |  |  |  |  |  |  |  |  |
2014 MIP Plan | MIP Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 |  |  |  | 25,941 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | 25,941 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
2016 |  |  |  | 11,496 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | 11,496 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
2017 |  |  |  | 3,609 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | 3,609 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  | 8,557,461 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Balance at the end of the period (in shares) |  |  |  | 8,557,461 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | 8,557,461 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Weighted Average Exercise price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  |  | $ 30.31 gnk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Outstanding at the end of the period (in dollars per share) |  |  |  | $ 30.31 gnk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | $ 30.31 gnk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateExercisePrice / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Weighted-average remaining contractual life |  |  |  | 5 years 7 months 6 days |  |  |  |  |  |  |  |  |  |  |
Weighted Average Grant Date Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  |  | $ 6.36 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Balance at the end of the period (in dollars per share) |  |  |  | $ 6.36 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | $ 6.36 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to nonvested stock awards [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost |  |  |  | $ 41,046 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  | $ 41,046 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |  |
2014 MIP Plan | MIP Warrants | $25.91 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of common stock available for awards |  |  |  |  |  |  | 2,380,664 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierOneMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Strike price (in dollars per share) |  |  |  |  |  |  | 25.91 us-gaap_OptionIndexedToIssuersEquityStrikePrice1 / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierOneMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Fair value of warrant (in dollars per share) |  |  |  |  |  |  | 7.22 gnk_FairValueOfWarrant / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierOneMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
2014 MIP Plan | MIP Warrants | $28.73 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of common stock available for awards |  |  |  |  |  |  | 2,467,009 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierTwoMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Strike price (in dollars per share) |  |  |  |  |  |  | 28.73 us-gaap_OptionIndexedToIssuersEquityStrikePrice1 / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierTwoMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Fair value of warrant (in dollars per share) |  |  |  |  |  |  | 6.63 gnk_FairValueOfWarrant / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierTwoMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
2014 MIP Plan | MIP Warrants | $34.19 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested Stock Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of shares of common stock available for awards |  |  |  |  |  |  | 3,709,788 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierThreeMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Strike price (in dollars per share) |  |  |  |  |  |  | 34.19 us-gaap_OptionIndexedToIssuersEquityStrikePrice1 / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierThreeMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Fair value of warrant (in dollars per share) |  |  |  |  |  |  | 5.63 gnk_FairValueOfWarrant / us-gaap_AwardTypeAxis = gnk_MIPWarrantsTierThreeMember / us-gaap_ClassOfWarrantOrRightAxis = gnk_ManagementIncentivePlanWarrantsIssueMember / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2014ManagementIncentivePlanMember |  |  |  |  |  |  |  |
Peter C. Georgiopoulos, Chairman of Board | Baltic Trading Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  |  | 700,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_TitleOfIndividualAxis = us-gaap_BoardOfDirectorsChairmanMember |  |  |  |  |  |
Peter C. Georgiopoulos, Chairman of Board | Predecessor | Baltic Trading Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  |  |  | 539,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_TitleOfIndividualAxis = us-gaap_BoardOfDirectorsChairmanMember | 166,666 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / dei_LegalEntityAxis = gnk_BalticTradingLimitedMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_TitleOfIndividualAxis = us-gaap_BoardOfDirectorsChairmanMember |  |  |  |
Peter C. Georgiopoulos, Chairman of Board | 2005 and 2012 GS&T Plans | Predecessor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of anniversaries in which award vests, which are not granted as part of grants to all directors |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  |  |  |  | 100,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_PlanNameAxis = gnk_GencoShippingAndTradingLimited2005And2012EquityIncentivePlansMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember / us-gaap_TitleOfIndividualAxis = us-gaap_BoardOfDirectorsChairmanMember |  |  |  |

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- Definition This element represents the fair value of each warrant upon emergence from bankruptcy. + References No definition available. + Details
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- Definition Represents the percentage of Shares of post emergence common stock outstanding as of the Effective Date on a fully-diluted basis under 2014 Management Incentive Plan + References No definition available. + Details
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- Definition The weighted average exercise price at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References No definition available. + Details
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- Definition The weighted average exercise price of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References No definition available. + Details
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- Definition Fair value of share-based awards outstanding other than options. + References No definition available. + Details
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- Definition Represents the number of anniversaries in which award vests, which are not granted as part of grants made to all directors. + References No definition available. + Details
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- Definition Represents the number of anniversaries in which award vests which are granted in connection with Baltic Trading's IPO. + References No definition available. + Details
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- Definition Represents the number of anniversaries in which award vests. + References No definition available. + Details
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- Definition Represents the number of anniversaries in which award vests that is not in connection with the entity's IPO. + References No definition available. + Details
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- Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during 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 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during 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 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during 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 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Exercise or strike price stated in the contract for options indexed to the issuer's equity shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=6940734&loc=d3e22047-110879 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6445032&loc=d3e90205-114008 + Details
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- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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