<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:gnk="http://gencoshipping.com/20261104"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2025"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="gnk-20261104.xsd" xlink:type="simple"/>
    <context id="c20261104to20261104">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001326200</identifier>
        </entity>
        <period>
            <startDate>2026-11-04</startDate>
            <endDate>2026-11-04</endDate>
        </period>
    </context>
    <context id="c20261104to20261104_StatementClassOfStockAxis_CommonStockMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001326200</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:CommonStockMember</xbrldi:explicitMember>
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        </entity>
        <period>
            <startDate>2026-11-04</startDate>
            <endDate>2026-11-04</endDate>
        </period>
    </context>
    <context id="c20261104to20261104_StatementClassOfStockAxis_PreferredStockPurchaseRightsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001326200</identifier>
            <segment>
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        </entity>
        <period>
            <startDate>2026-11-04</startDate>
            <endDate>2026-11-04</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="c20261104to20261104"
      id="Fact_03472066b99c4b9dae30906de9f025c5">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="c20261104to20261104"
      id="Fact_37f6fc6b36d34b4a8cadee8be746a38f">0001326200</dei:EntityCentralIndexKey>
    <dei:EntityIncorporationStateCountryCode
      contextRef="c20261104to20261104"
      id="Fact_c8fa2b9f90834777924868dfc6493e5b">1T</dei:EntityIncorporationStateCountryCode>
    <dei:DocumentType
      contextRef="c20261104to20261104"
      id="Fact_1256c3b00a6641a3b37d763d3ae34180">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="c20261104to20261104"
      id="Fact_fb981361de3c4d2198b2ac98cb865349">2026-11-04</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="c20261104to20261104"
      id="Fact_d5b9db1dda864efd88da932e73e0e48e">GENCO SHIPPING &amp; TRADING LIMITED</dei:EntityRegistrantName>
    <dei:EntityFileNumber
      contextRef="c20261104to20261104"
      id="Fact_f2d38d22eaad4b48a593e3bdd4a7b9de">001-33393</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="c20261104to20261104"
      id="Fact_55db9a549f784ef3b1821bfdef83fc18">98-0439758</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="c20261104to20261104"
      id="Fact_55edb83992f340b1939262e91bc9baf0">299 Park Avenue</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="c20261104to20261104"
      id="Fact_78e7376dad904a6bbe1785a6ec1c2706">12th Floor</dei:EntityAddressAddressLine2>
    <dei:EntityAddressStateOrProvince
      contextRef="c20261104to20261104"
      id="Fact_5f35de445bf34d40ae03ad55c28ba7bb">NY</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressCityOrTown
      contextRef="c20261104to20261104"
      id="Fact_eef1462053914286939fdec294a08519">NY</dei:EntityAddressCityOrTown>
    <dei:EntityAddressPostalZipCode
      contextRef="c20261104to20261104"
      id="Fact_e71f80a42a5a45139a29a53c1f5c790c">10171</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="c20261104to20261104"
      id="Fact_94fc8f184acc4c0397b84575a265e353">646</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="c20261104to20261104"
      id="Fact_cfd9896cba514d4cb8dd1a09ea110dd8">443-8550</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="c20261104to20261104"
      id="Fact_b07177ea2e904e38a4bdec4733912e77">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="c20261104to20261104"
      id="Fact_5b51ddbc245745d2b68127fc72312a18">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="c20261104to20261104"
      id="Fact_a34d0bbff723424b9fa92133a1e75dd8">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="c20261104to20261104"
      id="Fact_8f5d203ac03e4c9b98a7304ea44f500e">false</dei:PreCommencementIssuerTenderOffer>
    <dei:EntityEmergingGrowthCompany
      contextRef="c20261104to20261104"
      id="Fact_4e0341cb86574e26b56ac62ec0c1be75">false</dei:EntityEmergingGrowthCompany>
    <dei:Security12bTitle
      contextRef="c20261104to20261104_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_3b2f1561d6924e8584d65b16a5fae398">Common stock, par value $0.01 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20261104to20261104_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_683351212f5e4938ad63acf244d1f06a">GNK</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20261104to20261104_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_4e5b4a9407374c8aa316488aa6e48f39">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="c20261104to20261104_StatementClassOfStockAxis_PreferredStockPurchaseRightsMember"
      id="Fact_b0e36317da334e90b9c7e0780b9f26aa">Preferred Stock Purchase Rights</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20261104to20261104_StatementClassOfStockAxis_PreferredStockPurchaseRightsMember"
      id="Fact_9117d4ef6ca64ffaaf2a54888be16776">N/A</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20261104to20261104_StatementClassOfStockAxis_PreferredStockPurchaseRightsMember"
      id="Fact_0ee92cc0487d48ba959de747cc31f495">NYSE</dei:SecurityExchangeName>
</xbrl>
