<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>219</ContextCount>
  <ElementCount>294</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>82</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995200090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995200100 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/StatementCondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995200105 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995200200 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/StatementCondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995200300 - Statement - Condensed Consolidated Statements of Shareholders Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/StatementCondensedConsolidatedStatementsOfShareholdersEquity</Role>
      <ShortName>Condensed Consolidated Statements of Shareholders Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995200305 - Statement - Condensed Consolidated Statements of Shareholders Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/StatementCondensedConsolidatedStatementsOfShareholdersEquityParenthetical</Role>
      <ShortName>Condensed Consolidated Statements of Shareholders Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995200400 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/StatementCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995210101 - Disclosure - Basis of Presentation and General Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureBasisOfPresentationAndGeneralInformation</Role>
      <ShortName>Basis of Presentation and General Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995210201 - Disclosure - Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureSignificantAccountingPolicies</Role>
      <ShortName>Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995210301 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureSegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995210401 - Disclosure - Transactions with Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureTransactionsWithRelatedParties</Role>
      <ShortName>Transactions with Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995210501 - Disclosure - Deferred Charges, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureDeferredChargesNet</Role>
      <ShortName>Deferred Charges, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995210601 - Disclosure - Vessels, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureVesselsNet</Role>
      <ShortName>Vessels, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995210701 - Disclosure - Vessel Under Construction</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureVesselUnderConstruction</Role>
      <ShortName>Vessel Under Construction</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995210801 - Disclosure - Long-term Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLongTermDebt</Role>
      <ShortName>Long-term Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995210901 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLeases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995211001 - Disclosure - Common Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureCommonStock</Role>
      <ShortName>Common Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995211101 - Disclosure - Dividends</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureDividends</Role>
      <ShortName>Dividends</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995211201 - Disclosure - Stock-Based Compensation Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureStockBasedCompensationPlans</Role>
      <ShortName>Stock-Based Compensation Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995211301 - Disclosure - Revenues</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureRevenues</Role>
      <ShortName>Revenues</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995211401 - Disclosure - Financial Instruments and Fair Value Disclosures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosures</Role>
      <ShortName>Financial Instruments and Fair Value Disclosures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995211501 - Disclosure - Earnings Per Share ("EPS")</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureEarningsPerShareeps</Role>
      <ShortName>Earnings Per Share ("EPS")</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995211601 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995211701 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>99920202 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureSignificantAccountingPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>99930103 - Disclosure - Basis of Presentation and General Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureBasisOfPresentationAndGeneralInformationTables</Role>
      <ShortName>Basis of Presentation and General Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureBasisOfPresentationAndGeneralInformation</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>99930303 - Disclosure - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureSegmentReportingTables</Role>
      <ShortName>Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureSegmentReporting</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>99930503 - Disclosure - Deferred Charges, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureDeferredChargesNetTables</Role>
      <ShortName>Deferred Charges, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureDeferredChargesNet</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>99930603 - Disclosure - Vessels, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureVesselsNetTables</Role>
      <ShortName>Vessels, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureVesselsNet</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>99930703 - Disclosure - Vessel Under Construction (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureVesselUnderConstructionTables</Role>
      <ShortName>Vessel Under Construction (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureVesselUnderConstruction</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>99930803 - Disclosure - Long-term Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLongTermDebtTables</Role>
      <ShortName>Long-term Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureLongTermDebt</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>99930903 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureLeases</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>99931203 - Disclosure - Stock-Based Compensation Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureStockBasedCompensationPlansTables</Role>
      <ShortName>Stock-Based Compensation Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureStockBasedCompensationPlans</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>99931303 - Disclosure - Revenues (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureRevenuesTables</Role>
      <ShortName>Revenues (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureRevenues</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>99931403 - Disclosure - Financial Instruments and Fair Value Disclosures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresTables</Role>
      <ShortName>Financial Instruments and Fair Value Disclosures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosures</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>99931503 - Disclosure - Earnings Per Share ("EPS") (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureEarningsPerShareepsTables</Role>
      <ShortName>Earnings Per Share ("EPS") (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureEarningsPerShareeps</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>99931603 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>99940101 - Disclosure - Basis of Presentation and General Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureBasisOfPresentationAndGeneralInformationDetails</Role>
      <ShortName>Basis of Presentation and General Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureBasisOfPresentationAndGeneralInformationTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>99940102 - Disclosure - Basis of Presentation and General Information - Vessel Capacity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureBasisOfPresentationAndGeneralInformationVesselCapacityDetails</Role>
      <ShortName>Basis of Presentation and General Information - Vessel Capacity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>99940301 - Disclosure - Segment Reporting - Single Reportable Segment Summary (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureSegmentReportingSingleReportableSegmentSummaryDetails</Role>
      <ShortName>Segment Reporting - Single Reportable Segment Summary (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>99940401 - Disclosure - Transactions with Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureTransactionsWithRelatedPartiesDetails</Role>
      <ShortName>Transactions with Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureTransactionsWithRelatedParties</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>99940402 - Disclosure - Transactions with Related Parties - Helios LPG Pool LLC (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureTransactionsWithRelatedPartiesHeliosLpgPoolLlcDetails</Role>
      <ShortName>Transactions with Related Parties - Helios LPG Pool LLC (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>99940501 - Disclosure - Deferred Charges, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureDeferredChargesNetDetails</Role>
      <ShortName>Deferred Charges, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureDeferredChargesNetTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>99940601 - Disclosure - Vessels, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureVesselsNetDetails</Role>
      <ShortName>Vessels, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureVesselsNetTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>99940701 - Disclosure - Vessel Under Construction (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureVesselUnderConstructionDetails</Role>
      <ShortName>Vessel Under Construction (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureVesselUnderConstructionTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>99940801 - Disclosure - Long-term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLongTermDebtDetails</Role>
      <ShortName>Long-term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureLongTermDebtTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>99940802 - Disclosure - Long-term Debt - Outstanding Debt Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLongTermDebtOutstandingDebtObligationsDetails</Role>
      <ShortName>Long-term Debt - Outstanding Debt Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>99940803 - Disclosure - Long-term Debt - Deferred Financing Fees (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLongTermDebtDeferredFinancingFeesDetails</Role>
      <ShortName>Long-term Debt - Deferred Financing Fees (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>99940901 - Disclosure - Leases - Time Charter-in Contracts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLeasesTimeCharterInContractsDetails</Role>
      <ShortName>Leases - Time Charter-in Contracts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>99940902 - Disclosure - Leases - Office Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLeasesOfficeLeasesDetails</Role>
      <ShortName>Leases - Office Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>99940903 - Disclosure - Leases - Operating Lease Right-of-Use Asset and Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLeasesOperatingLeaseRightOfUseAssetAndLeaseLiabilitiesDetails</Role>
      <ShortName>Leases - Operating Lease Right-of-Use Asset and Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>99940904 - Disclosure - Leases - Maturities of Operating Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureLeasesMaturitiesOfOperatingLeaseLiabilitiesDetails</Role>
      <ShortName>Leases - Maturities of Operating Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>99941001 - Disclosure - Common Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureCommonStockDetails</Role>
      <ShortName>Common Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureCommonStock</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>99941101 - Disclosure - Dividends (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureDividendsDetails</Role>
      <ShortName>Dividends (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureDividends</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>99941201 - Disclosure - Stock-Based Compensation Plans - Restricted Share Unit Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureStockBasedCompensationPlansRestrictedShareUnitActivityDetails</Role>
      <ShortName>Stock-Based Compensation Plans - Restricted Share Unit Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>99941301 - Disclosure - Revenues (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureRevenuesDetails</Role>
      <ShortName>Revenues (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureRevenuesTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>99941401 - Disclosure - Financial Instruments and Fair Value Disclosures - Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresFairValueMeasurementsDetails</Role>
      <ShortName>Financial Instruments and Fair Value Disclosures - Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>99941402 - Disclosure - Financial Instruments and Fair Value Disclosures - Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresFinancialInstrumentsDetails</Role>
      <ShortName>Financial Instruments and Fair Value Disclosures - Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>99941403 - Disclosure - Financial Instruments and Fair Value Disclosures - Carrying Value and Fair Value of Long-term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresCarryingValueAndFairValueOfLongTermDebtDetails</Role>
      <ShortName>Financial Instruments and Fair Value Disclosures - Carrying Value and Fair Value of Long-term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>99941404 - Disclosure - Financial Instruments and Fair Value Disclosures - Interest Rate Swaps (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureFinancialInstrumentsAndFairValueDisclosuresInterestRateSwapsDetails</Role>
      <ShortName>Financial Instruments and Fair Value Disclosures - Interest Rate Swaps (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>99941501 - Disclosure - Earnings Per Share ("EPS") (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureEarningsPerShareepsDetails</Role>
      <ShortName>Earnings Per Share ("EPS") (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureEarningsPerShareepsTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>99941601 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureCommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureCommitmentsAndContingenciesTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="lpg-20251231x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>99941701 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://dorianlpg.com/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://dorianlpg.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>65</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>lpg-20251231.xsd</File>
    <File>lpg-20251231_cal.xml</File>
    <File>lpg-20251231_def.xml</File>
    <File>lpg-20251231_lab.xml</File>
    <File>lpg-20251231_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="lpg-20251231x10q.htm">lpg-20251231x10q.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>lpg-20251231x10q001.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="585">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
