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v2.4.1.9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 24 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014 | Jul. 09, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013
Income Taxes |  |  |  |  |  |
Ownership percentage held by each shareholder (as a percent) |  | 5.00%gnk_OwnershipPercentageHeldByEachShareholder |  |  |  |
Federal tax rate (as a percent) |  | 4.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate |  |  |  |
Taxable income | $ (212,362)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |  |  |  |  |
Income tax expense | 996 us-gaap_IncomeTaxExpenseBenefit |  |  |  |  |
Total revenue earned | 1,584 us-gaap_SalesRevenueServicesNet |  |  |  |  |
Intersegment Elimination |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Total revenue earned | (2,309)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember |  |  |  |  |
Maximum |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Combined ownership held by 5% shareholders (as a percent) |  | 50.00%gnk_CombinedOwnershipPercentageHeldBy5PercentShareholders / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |
Federal tax rate (as a percent) |  | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |
Percentage of shipping income attributable to transportation that begins or ends in the United States included in United States source shipping income (in hundredths) |  | 50.00%gnk_PercentageOfShippingIncomeAttributableToTransportationBeginningOrEndingInDomesticCountryIncludedInSourceShippingIncome / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |
Vessel Management Services |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Taxable income | 2,178 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember |  |  |  |  |
Income tax expense | 978 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember |  |  |  |  |
Total revenue earned | 3,893 us-gaap_SalesRevenueServicesNet / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember |  |  |  |  |
Vessel Management Services | Intersegment Elimination |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Total revenue earned | (2,309)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember |  |  |  |  |
Predecessor |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Ownership percentage held by each shareholder (as a percent) |  |  |  | 5.00%gnk_OwnershipPercentageHeldByEachShareholder / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 5.00%gnk_OwnershipPercentageHeldByEachShareholder / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Taxable income |  |  | 785,372 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (155,123)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (156,554)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Income tax expense |  |  | 815 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,898 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,222 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Total revenue earned |  |  | 1,701 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 3,285 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 3,294 us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Predecessor | Intersegment Elimination |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Total revenue earned |  |  | (2,156)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (4,571)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (2,816)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Predecessor | Maximum |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Combined ownership held by 5% shareholders (as a percent) |  |  |  |  |  | 50.00%gnk_CombinedOwnershipPercentageHeldBy5PercentShareholders / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor | Vessel Management Services |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Taxable income |  |  | 1,723 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 4,235 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 2,655 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Income tax expense |  |  | 776 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,864 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,194 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Total revenue earned |  |  | 3,857 us-gaap_SalesRevenueServicesNet / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 7,856 us-gaap_SalesRevenueServicesNet / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 6,110 us-gaap_SalesRevenueServicesNet / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Predecessor | Vessel Management Services | Intersegment Elimination |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Total revenue earned |  |  | (2,156)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (4,571)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | (2,816)us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_ProductOrServiceAxis = gnk_VesselManagementServicesMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Baltic Trading | Minimum |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Aggregate voting power held (as a percent) | 50.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember | 50.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember |  |  |  |
Baltic Trading | United States |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Taxable income | 900 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementGeographicalAxis = country_US |  |  |  |  |
Income tax expense | 18 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementGeographicalAxis = country_US |  |  |  |  |
Baltic Trading | Predecessor | United States |  |  |  |  |  |
Income Taxes |  |  |  |  |  |
Taxable income |  |  | 1,930 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,664 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | 1,379 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
Income tax expense |  |  | $ 39 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | $ 34 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember | $ 28 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = gnk_BalticTradingMember / us-gaap_StatementGeographicalAxis = country_US / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |

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