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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vessels held for sale (Details) $ in Thousands | 3 Months Ended
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Jun. 30, 2024 USD ($)
Genco Claudius And Genco Maximus | Forecast |
Vessels, net |
Vessel deposits retained due to termination of agreement | $ 3,650

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- References No definition available. + Details
Name: | gnk_VesselsAbstract
Namespace Prefix: | gnk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the amount of vessel deposits retained due to termination of the agreement. + References No definition available. + Details
Name: | gnk_VesselsDepositsRetainedPerTerminationOfAgreement
Namespace Prefix: | gnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=gnk_GencoClaudiusAndGencoMaximusMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |