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RELATED PARTY TRANSACTIONS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Related Party Transaction
Service revenues	$ 810us-gaap_SalesRevenueServicesNet
General Maritime Corporation
Related Party Transaction
Expenses incurred from transactions with related party	30us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_GeneralMaritimeCorporationMember
Amount due to the related party	30us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_GeneralMaritimeCorporationMember		41us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_GeneralMaritimeCorporationMember
Constantine Georgiopoulos
Related Party Transaction
Expenses incurred from transactions with related party	8us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember
Amount due to the related party	2us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember		9us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember
Aegean Marine Petroleum Network Inc.
Related Party Transaction
Expenses incurred from transactions with related party	343us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_AegeanMarinePetroleumNetworkIncMember
Amount due to the related party	202us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_AegeanMarinePetroleumNetworkIncMember		267us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_AegeanMarinePetroleumNetworkIncMember
MEP
Related Party Transaction
Amount invoiced for services performed and expenses paid	818gnk_RelatedPartyTransactionAmountInvoicedForServicesProvidedAndExpensesPaid / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_MaritimeEquityPartnersLlcMember
Service revenues	810us-gaap_SalesRevenueServicesNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_MaritimeEquityPartnersLlcMember
Amount due to the entity from a related party	532us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_MaritimeEquityPartnersLlcMember		10us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_MaritimeEquityPartnersLlcMember
Predecessor
Related Party Transaction
Service revenues		810us-gaap_SalesRevenueServicesNet / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor | General Maritime Corporation
Related Party Transaction
Amount invoiced for services performed and expenses paid		35gnk_RelatedPartyTransactionAmountInvoicedForServicesProvidedAndExpensesPaid / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_GeneralMaritimeCorporationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Expenses incurred from transactions with related party		28us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_GeneralMaritimeCorporationMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor | Constantine Georgiopoulos
Related Party Transaction
Expenses incurred from transactions with related party		3us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor | Aegean Marine Petroleum Network Inc.
Related Party Transaction
Expenses incurred from transactions with related party		600us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_AegeanMarinePetroleumNetworkIncMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Predecessor | MEP
Related Party Transaction
Amount invoiced for services performed and expenses paid		822gnk_RelatedPartyTransactionAmountInvoicedForServicesProvidedAndExpensesPaid / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_MaritimeEquityPartnersLlcMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember
Service revenues		$ 810us-gaap_SalesRevenueServicesNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = gnk_MaritimeEquityPartnersLlcMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember

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