<?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/20260506"
  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-20260506.xsd" xlink:type="simple"/>
    <context id="c20260506to20260506">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001326200</identifier>
        </entity>
        <period>
            <startDate>2026-05-06</startDate>
            <endDate>2026-05-06</endDate>
        </period>
    </context>
    <context id="c20260506to20260506_StatementClassOfStockAxis_CommonStockMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001326200</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:CommonStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-06</startDate>
            <endDate>2026-05-06</endDate>
        </period>
    </context>
    <context id="c20260506to20260506_StatementClassOfStockAxis_PreferredStockPurchaseRightsMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001326200</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">gnk:PreferredStockPurchaseRightsMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-06</startDate>
            <endDate>2026-05-06</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="c20260506to20260506"
      id="Fact_64c57c158a3147ef83639e2b5603b4ea">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="c20260506to20260506"
      id="Fact_a8f85bdc2bd147bebaea2bb93c5e8694">0001326200</dei:EntityCentralIndexKey>
    <dei:SecurityExchangeName
      contextRef="c20260506to20260506_StatementClassOfStockAxis_PreferredStockPurchaseRightsMember"
      id="Fact_aa13b46a6e994adb853a8cdde7389c72">NYSE</dei:SecurityExchangeName>
    <dei:SecurityExchangeName
      contextRef="c20260506to20260506_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_830fd0cf3fd640ff9dd800f6f611e5bb">NYSE</dei:SecurityExchangeName>
    <dei:DocumentType
      contextRef="c20260506to20260506"
      id="Fact_9932500214fc47109244599148f786cd">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="c20260506to20260506"
      id="Fact_e366fa6eb7c04eda902afb077682e043">2026-05-06</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="c20260506to20260506"
      id="Fact_f2cd88b5341c422a8de7824cefd5a91a">GENCO SHIPPING &amp; TRADING LIMITED</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="c20260506to20260506"
      id="Fact_78f0b6ede0ec4c9bafc35d30ddaeb3a0">1T</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="c20260506to20260506"
      id="Fact_76151b17344247bc8fbe35b29934a4d0">001-33393</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="c20260506to20260506"
      id="Fact_40df32bde98348efa9f0968856cff0bf">98-0439758</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="c20260506to20260506"
      id="Fact_7b4bac634240413a8f22036ab43c1bf6">299 Park Avenue</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="c20260506to20260506"
      id="Fact_c099f80e0b5642ebb8568a95046cbf64">12th Floor</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="c20260506to20260506"
      id="Fact_f2ee8b97ee1949dcbc07576391777b0e">New York</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="c20260506to20260506"
      id="Fact_0ac4baff8e884003ba03edecbb1d2344">NY</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="c20260506to20260506"
      id="Fact_9ce5d8e4ebf04267b860bc44f35adbc1">10171</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="c20260506to20260506"
      id="Fact_6247754885924376a742ef9c4774442f">646</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="c20260506to20260506"
      id="Fact_cc1f9086c1a24e0e9a726ae0c83d4177">443-8550</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="c20260506to20260506"
      id="Fact_16788a99afec49f98640f704f2012e0c">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="c20260506to20260506"
      id="Fact_0677e1fc4c224802b2d8501830e6e0c1">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="c20260506to20260506"
      id="Fact_7ce13890372545669e995b513b3eea83">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="c20260506to20260506"
      id="Fact_2398289b5d3a4ae79ad56564bea8e8f1">false</dei:PreCommencementIssuerTenderOffer>
    <dei:EntityEmergingGrowthCompany
      contextRef="c20260506to20260506"
      id="Fact_e35b41adcb43456a874aaf4a9c6787c8">false</dei:EntityEmergingGrowthCompany>
    <dei:Security12bTitle
      contextRef="c20260506to20260506_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_9765d5fa91ad424c9b1b85d2e64c184c">Common stock, par value $0.01 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20260506to20260506_StatementClassOfStockAxis_CommonStockMember"
      id="Fact_fae6691db65840968ff5d462ca68f817">GNK</dei:TradingSymbol>
    <dei:Security12bTitle
      contextRef="c20260506to20260506_StatementClassOfStockAxis_PreferredStockPurchaseRightsMember"
      id="Fact_7181c3ea650944228b854eab7a858685">Preferred Stock Purchase Rights</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20260506to20260506_StatementClassOfStockAxis_PreferredStockPurchaseRightsMember"
      id="Fact_bd06f0132d5647269189f456b16bfde5">N/A</dei:TradingSymbol>
</xbrl>
