3.20.4 html 425 474 1 false 218 0 false 10 false false R1.htm 00090 - Document - Document and Entity Information Sheet http://gencoshipping.com/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00100 - Statement - Consolidated Balance Sheets Sheet http://gencoshipping.com/role/StatementConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 00105 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://gencoshipping.com/role/StatementConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 00200 - Statement - Consolidated Statements of Operations Sheet http://gencoshipping.com/role/StatementConsolidatedStatementsOfOperations Consolidated Statements of Operations Statements 4 false false R5.htm 00205 - Statement - Consolidated Statements of Operations (Parenthetical) Sheet http://gencoshipping.com/role/StatementConsolidatedStatementsOfOperationsParenthetical Consolidated Statements of Operations (Parenthetical) Statements 5 false false R6.htm 00300 - Statement - Consolidated Statements of Comprehensive Loss Sheet http://gencoshipping.com/role/StatementConsolidatedStatementsOfComprehensiveLoss Consolidated Statements of Comprehensive Loss Statements 6 false false R7.htm 00400 - Statement - Consolidated Statements of Equity Sheet http://gencoshipping.com/role/StatementConsolidatedStatementsOfEquity Consolidated Statements of Equity Statements 7 false false R8.htm 00405 - Statement - Consolidated Statements of Equity (Parenthetical) Sheet http://gencoshipping.com/role/StatementConsolidatedStatementsOfEquityParenthetical Consolidated Statements of Equity (Parenthetical) Statements 8 false false R9.htm 00500 - Statement - Consolidated Statements of Cash Flows Sheet http://gencoshipping.com/role/StatementConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 9 false false R10.htm 10101 - Disclosure - GENERAL INFORMATION Sheet http://gencoshipping.com/role/DisclosureGeneralInformation GENERAL INFORMATION Notes 10 false false R11.htm 10201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPolicies SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Notes 11 false false R12.htm 10301 - Disclosure - CASH FLOW INFORMATION Sheet http://gencoshipping.com/role/DisclosureCashFlowInformation CASH FLOW INFORMATION Notes 12 false false R13.htm 10401 - Disclosure - VESSEL ACQUISITIONS AND DISPOSITIONS Sheet http://gencoshipping.com/role/DisclosureVesselAcquisitionsAndDispositions VESSEL ACQUISITIONS AND DISPOSITIONS Notes 13 false false R14.htm 10501 - Disclosure - NET LOSS PER SHARE Sheet http://gencoshipping.com/role/DisclosureNetLossPerShare NET LOSS PER SHARE Notes 14 false false R15.htm 10601 - Disclosure - RELATED PARTY TRANSACTIONS Sheet http://gencoshipping.com/role/DisclosureRelatedPartyTransactions RELATED PARTY TRANSACTIONS Notes 15 false false R16.htm 10701 - Disclosure - DEBT Sheet http://gencoshipping.com/role/DisclosureDebt DEBT Notes 16 false false R17.htm 10801 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS Sheet http://gencoshipping.com/role/DisclosureFairValueOfFinancialInstruments FAIR VALUE OF FINANCIAL INSTRUMENTS Notes 17 false false R18.htm 10901 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS Sheet http://gencoshipping.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssets PREPAID EXPENSES AND OTHER CURRENT ASSETS Notes 18 false false R19.htm 11001 - Disclosure - FIXED ASSETS Sheet http://gencoshipping.com/role/DisclosureFixedAssets FIXED ASSETS Notes 19 false false R20.htm 11101 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED EXPENSES Sheet http://gencoshipping.com/role/DisclosureAccountsPayableAndAccruedExpenses ACCOUNTS PAYABLE AND ACCRUED EXPENSES Notes 20 false false R21.htm 11201 - Disclosure - VOYAGE REVENUE Sheet http://gencoshipping.com/role/DisclosureVoyageRevenue VOYAGE REVENUE Notes 21 false false R22.htm 11301 - Disclosure - LEASES Sheet http://gencoshipping.com/role/DisclosureLeases LEASES Notes 22 false false R23.htm 11401 - Disclosure - COMMITMENTS AND CONTINGENCIES Sheet http://gencoshipping.com/role/DisclosureCommitmentsAndContingencies COMMITMENTS AND CONTINGENCIES Notes 23 false false R24.htm 11501 - Disclosure - SAVINGS PLAN Sheet http://gencoshipping.com/role/DisclosureSavingsPlan SAVINGS PLAN Notes 24 false false R25.htm 11601 - Disclosure - STOCK-BASED COMPENSATION Sheet http://gencoshipping.com/role/DisclosureStockBasedCompensation STOCK-BASED COMPENSATION Notes 25 false false R26.htm 11701 - Disclosure - LEGAL PROCEEDINGS Sheet http://gencoshipping.com/role/DisclosureLegalProceedings LEGAL PROCEEDINGS Notes 26 false false R27.htm 11801 - Disclosure - UNAUDITED QUARTERLY RESULTS OF OPERATIONS Sheet http://gencoshipping.com/role/DisclosureUnauditedQuarterlyResultsOfOperations UNAUDITED QUARTERLY RESULTS OF OPERATIONS Notes 27 false false R28.htm 11901 - Disclosure - SUBSEQUENT EVENTS Sheet http://gencoshipping.com/role/DisclosureSubsequentEvents SUBSEQUENT EVENTS Notes 28 false false R29.htm 20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Policies 29 false false R30.htm 30103 - Disclosure - GENERAL INFORMATION (Tables) Sheet http://gencoshipping.com/role/DisclosureGeneralInformationTables GENERAL INFORMATION (Tables) Tables http://gencoshipping.com/role/DisclosureGeneralInformation 30 false false R31.htm 30203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) Tables http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPolicies 31 false false R32.htm 30503 - Disclosure - NET LOSS PER SHARE (Tables) Sheet http://gencoshipping.com/role/DisclosureNetLossPerShareTables NET LOSS PER SHARE (Tables) Tables http://gencoshipping.com/role/DisclosureNetLossPerShare 32 false false R33.htm 30703 - Disclosure - DEBT (Tables) Sheet http://gencoshipping.com/role/DisclosureDebtTables DEBT (Tables) Tables http://gencoshipping.com/role/DisclosureDebt 33 false false R34.htm 30803 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables) Sheet http://gencoshipping.com/role/DisclosureFairValueOfFinancialInstrumentsTables FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables) Tables http://gencoshipping.com/role/DisclosureFairValueOfFinancialInstruments 34 false false R35.htm 30903 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables) Sheet http://gencoshipping.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsTables PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables) Tables http://gencoshipping.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssets 35 false false R36.htm 31003 - Disclosure - FIXED ASSETS (Tables) Sheet http://gencoshipping.com/role/DisclosureFixedAssetsTables FIXED ASSETS (Tables) Tables http://gencoshipping.com/role/DisclosureFixedAssets 36 false false R37.htm 31103 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Tables) Sheet http://gencoshipping.com/role/DisclosureAccountsPayableAndAccruedExpensesTables ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Tables) Tables http://gencoshipping.com/role/DisclosureAccountsPayableAndAccruedExpenses 37 false false R38.htm 31203 - Disclosure - VOYAGE REVENUE (Tables) Sheet http://gencoshipping.com/role/DisclosureVoyageRevenueTables VOYAGE REVENUE (Tables) Tables http://gencoshipping.com/role/DisclosureVoyageRevenue 38 false false R39.htm 31303 - Disclosure - LEASES (Tables) Sheet http://gencoshipping.com/role/DisclosureLeasesTables LEASES (Tables) Tables http://gencoshipping.com/role/DisclosureLeases 39 false false R40.htm 31603 - Disclosure - STOCK-BASED COMPENSATION (Tables) Sheet http://gencoshipping.com/role/DisclosureStockBasedCompensationTables STOCK-BASED COMPENSATION (Tables) Tables http://gencoshipping.com/role/DisclosureStockBasedCompensation 40 false false R41.htm 31803 - Disclosure - UNAUDITED QUARTERLY RESULTS OF OPERATIONS (Tables) Sheet http://gencoshipping.com/role/DisclosureUnauditedQuarterlyResultsOfOperationsTables UNAUDITED QUARTERLY RESULTS OF OPERATIONS (Tables) Tables http://gencoshipping.com/role/DisclosureUnauditedQuarterlyResultsOfOperations 41 false false R42.htm 40101 - Disclosure - GENERAL INFORMATION (Details) Sheet http://gencoshipping.com/role/DisclosureGeneralInformationDetails GENERAL INFORMATION (Details) Details http://gencoshipping.com/role/DisclosureGeneralInformationTables 42 false false R43.htm 40102 - Disclosure - GENERAL INFORMATION - Vessel Details (Details) Sheet http://gencoshipping.com/role/DisclosureGeneralInformationVesselDetailsDetails GENERAL INFORMATION - Vessel Details (Details) Details 43 false false R44.htm 40201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Segment (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesSegmentDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Segment (Details) Details http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables 44 false false R45.htm 40202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Voyage Expense Recognition (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesVoyageExpenseRecognitionDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Voyage Expense Recognition (Details) Details 45 false false R46.htm 40203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loss on Debt Extinguishment (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesLossOnDebtExtinguishmentDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loss on Debt Extinguishment (Details) Details 46 false false R47.htm 40204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vessels, net and Deferred revenue (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesVesselsNetAndDeferredRevenueDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vessels, net and Deferred revenue (Details) Details 47 false false R48.htm 40205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impairment of long-lived Assets (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesImpairmentOfLongLivedAssetsDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impairment of long-lived Assets (Details) Details 48 false false R49.htm 40206 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Sale of Vessels (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesSaleOfVesselsDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Sale of Vessels (Details) Details 49 false false R50.htm 40207 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Restricted Cash (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesRestrictedCashDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Restricted Cash (Details) Details 50 false false R51.htm 40208 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - United States Gross Transportation Tax (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesUnitedStatesGrossTransportationTaxDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - United States Gross Transportation Tax (Details) Details 51 false false R52.htm 40209 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration Risk (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesConcentrationRiskDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration Risk (Details) Details 52 false false R53.htm 40210 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Accounting Pronouncements (Details) Sheet http://gencoshipping.com/role/DisclosureSummaryOfSignificantAccountingPoliciesRecentAccountingPronouncementsDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Accounting Pronouncements (Details) Details 53 false false R54.htm 40301 - Disclosure - CASH FLOW INFORMATION - Non-cash (Details) Sheet http://gencoshipping.com/role/DisclosureCashFlowInformationNonCashDetails CASH FLOW INFORMATION - Non-cash (Details) Details 54 false false R55.htm 40302 - Disclosure - CASH FLOW INFORMATION - Stock-Based Compensation (Details) Sheet http://gencoshipping.com/role/DisclosureCashFlowInformationStockBasedCompensationDetails CASH FLOW INFORMATION - Stock-Based Compensation (Details) Details 55 false false R56.htm 40401 - Disclosure - VESSEL ACQUISITIONS AND DISPOSITIONS (Details) Sheet http://gencoshipping.com/role/DisclosureVesselAcquisitionsAndDispositionsDetails VESSEL ACQUISITIONS AND DISPOSITIONS (Details) Details http://gencoshipping.com/role/DisclosureVesselAcquisitionsAndDispositions 56 false false R57.htm 40501 - Disclosure - NET LOSS PER SHARE (Details) Sheet http://gencoshipping.com/role/DisclosureNetLossPerShareDetails NET LOSS PER SHARE (Details) Details http://gencoshipping.com/role/DisclosureNetLossPerShareTables 57 false false R58.htm 40601 - Disclosure - RELATED PARTY TRANSACTIONS (Details) Sheet http://gencoshipping.com/role/DisclosureRelatedPartyTransactionsDetails RELATED PARTY TRANSACTIONS (Details) Details http://gencoshipping.com/role/DisclosureRelatedPartyTransactions 58 false false R59.htm 40701 - Disclosure - DEBT - Components of Long-term Debt (Details) Sheet http://gencoshipping.com/role/DisclosureDebtComponentsOfLongTermDebtDetails DEBT - Components of Long-term Debt (Details) Details 59 false false R60.htm 40702 - Disclosure - DEBT - Expenses (Details) Sheet http://gencoshipping.com/role/DisclosureDebtExpensesDetails DEBT - Expenses (Details) Details 60 false false R61.htm 40703 - Disclosure - DEBT - Amended Facilities (Details) Sheet http://gencoshipping.com/role/DisclosureDebtAmendedFacilitiesDetails DEBT - Amended Facilities (Details) Details 61 false false R62.htm 40704 - Disclosure - DEBT - $133 Million Credit Facility (Details) Sheet http://gencoshipping.com/role/DisclosureDebt133MillionCreditFacilityDetails DEBT - $133 Million Credit Facility (Details) Details 62 false false R63.htm 40705 - Disclosure - DEBT - $495 Million Credit Facility (Details) Sheet http://gencoshipping.com/role/DisclosureDebt495MillionCreditFacilityDetails DEBT - $495 Million Credit Facility (Details) Details 63 false false R64.htm 40706 - Disclosure - DEBT - Prior Facilities (Details) Sheet http://gencoshipping.com/role/DisclosureDebtPriorFacilitiesDetails DEBT - Prior Facilities (Details) Details 64 false false R65.htm 40707 - Disclosure - DEBT - Interest Rates (Details) Sheet http://gencoshipping.com/role/DisclosureDebtInterestRatesDetails DEBT - Interest Rates (Details) Details 65 false false R66.htm 40801 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - RECURRING (Details) Sheet http://gencoshipping.com/role/DisclosureFairValueOfFinancialInstrumentsRecurringDetails FAIR VALUE OF FINANCIAL INSTRUMENTS - RECURRING (Details) Details 66 false false R67.htm 40802 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - NONRECURRING (Details) Sheet http://gencoshipping.com/role/DisclosureFairValueOfFinancialInstrumentsNonrecurringDetails FAIR VALUE OF FINANCIAL INSTRUMENTS - NONRECURRING (Details) Details 67 false false R68.htm 40901 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) Sheet http://gencoshipping.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsDetails PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) Details http://gencoshipping.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsTables 68 false false R69.htm 41001 - Disclosure - FIXED ASSETS (Details) Sheet http://gencoshipping.com/role/DisclosureFixedAssetsDetails FIXED ASSETS (Details) Details http://gencoshipping.com/role/DisclosureFixedAssetsTables 69 false false R70.htm 41101 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) Sheet http://gencoshipping.com/role/DisclosureAccountsPayableAndAccruedExpensesDetails ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) Details http://gencoshipping.com/role/DisclosureAccountsPayableAndAccruedExpensesTables 70 false false R71.htm 41201 - Disclosure - VOYAGE REVENUE (Details) Sheet http://gencoshipping.com/role/DisclosureVoyageRevenueDetails VOYAGE REVENUE (Details) Details http://gencoshipping.com/role/DisclosureVoyageRevenueTables 71 false false R72.htm 41301 - Disclosure - LEASES - Narrative (Details) Sheet http://gencoshipping.com/role/DisclosureLeasesNarrativeDetails LEASES - Narrative (Details) Details 72 false false R73.htm 41302 - Disclosure - LEASES - Balance Sheet Information (Details) Sheet http://gencoshipping.com/role/DisclosureLeasesBalanceSheetInformationDetails LEASES - Balance Sheet Information (Details) Details 73 false false R74.htm 41303 - Disclosure - LEASES - Operating Lease Liabilities (Details) Sheet http://gencoshipping.com/role/DisclosureLeasesOperatingLeaseLiabilitiesDetails LEASES - Operating Lease Liabilities (Details) Details 74 false false R75.htm 41401 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) Sheet http://gencoshipping.com/role/DisclosureCommitmentsAndContingenciesDetails COMMITMENTS AND CONTINGENCIES (Details) Details http://gencoshipping.com/role/DisclosureCommitmentsAndContingencies 75 false false R76.htm 41501 - Disclosure - SAVINGS PLAN (Details) Sheet http://gencoshipping.com/role/DisclosureSavingsPlanDetails SAVINGS PLAN (Details) Details http://gencoshipping.com/role/DisclosureSavingsPlan 76 false false R77.htm 41601 - Disclosure - STOCK-BASED COMPENSATION - 2014 MIP (Details) Sheet http://gencoshipping.com/role/DisclosureStockBasedCompensation2014MipDetails STOCK-BASED COMPENSATION - 2014 MIP (Details) Details 77 false false R78.htm 41602 - Disclosure - STOCK-BASED COMPENSATION - 2015 EIP Stock Options and Other (Details) Sheet http://gencoshipping.com/role/DisclosureStockBasedCompensation2015EipStockOptionsAndOtherDetails STOCK-BASED COMPENSATION - 2015 EIP Stock Options and Other (Details) Details 78 false false R79.htm 41603 - Disclosure - STOCK-BASED COMPENSATION - 2015 EIP Restricted Stock Units (Details) Sheet http://gencoshipping.com/role/DisclosureStockBasedCompensation2015EipRestrictedStockUnitsDetails STOCK-BASED COMPENSATION - 2015 EIP Restricted Stock Units (Details) Details 79 false false R80.htm 41604 - Disclosure - STOCK-BASED COMPENSATION - 2015 EIP Restricted Stock (Details) Sheet http://gencoshipping.com/role/DisclosureStockBasedCompensation2015EipRestrictedStockDetails STOCK-BASED COMPENSATION - 2015 EIP Restricted Stock (Details) Details 80 false false R81.htm 41801 - Disclosure - UNAUDITED QUARTERLY RESULTS OF OPERATIONS (Details) Sheet http://gencoshipping.com/role/DisclosureUnauditedQuarterlyResultsOfOperationsDetails UNAUDITED QUARTERLY RESULTS OF OPERATIONS (Details) Details http://gencoshipping.com/role/DisclosureUnauditedQuarterlyResultsOfOperationsTables 81 false false R82.htm 41901 - Disclosure - SUBSEQUENT EVENTS (Details) Sheet http://gencoshipping.com/role/DisclosureSubsequentEventsDetails SUBSEQUENT EVENTS (Details) Details http://gencoshipping.com/role/DisclosureSubsequentEvents 82 false false All Reports Book All Reports gnk-20201231x10k.htm gnk-20201231.xsd gnk-20201231_cal.xml gnk-20201231_def.xml gnk-20201231_lab.xml gnk-20201231_pre.xml gnk-20201231xex10d59.htm gnk-20201231xex10d60.htm gnk-20201231xex21d1.htm gnk-20201231xex23d1.htm gnk-20201231xex31d1.htm gnk-20201231xex31d2.htm gnk-20201231xex32d1.htm gnk-20201231xex32d2.htm http://fasb.org/srt/2019-01-31 http://xbrl.sec.gov/country/2017-01-31 http://fasb.org/us-gaap/2019-01-31 http://xbrl.sec.gov/dei/2019-01-31 http://xbrl.sec.gov/stpr/2018-01-31 true true