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Acquisition of Business (Details)
0 Months Ended 9 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended
Jul. 29, 2013
Dorian Holdings
Common stock
USD ($)
Jul. 29, 2013
Dorian Holdings
Common stock
NOK
Jul. 29, 2013
Business combination
USD ($)
Jul. 29, 2013
Business combination
USD ($)
Mar. 31, 2014
Business combination
Predecessor
USD ($)
Jul. 29, 2013
Business combination
Dorian Holdings
USD ($)
Jul. 29, 2013
Business combination
Dorian Holdings
USD ($)
Jul. 29, 2013
Business combination
Dorian Holdings
CNML LPG Transport LLC
Jul. 29, 2013
Business combination
Dorian Holdings
CJNP LPG Transport LLC
Jul. 29, 2013
Business combination
Dorian Holdings
CMNL LPG Transport LLC
Jul. 29, 2013
Business combination
Dorian Holdings
Other subsidiaries
USD ($)
item
Jul. 29, 2013
Business combination
Dorian Holdings
Other subsidiaries
Jul. 29, 2013
Business combination
Dorian Holdings
Common stock
Jul. 29, 2013
Business combination
Affiliates of Dorian Holdings
Grendon Tanker LLC
USD ($)
Jul. 29, 2013
Business combination
Affiliates of Dorian Holdings
Grendon Tanker LLC
USD ($)
Acquisition of business                              
Interest transferred to Dorian LPG Ltd. (as a percent)               100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_CNMLLPGTransportLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_CJNPLPGTransportLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_CMNLLPGTransportLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
  100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_OtherSubsidiaryMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
    100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_GrendonTankerLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_AffiliatesOfDorianHoldingsLLCMember
Number of entities which are party to contract for construction of VLGC                     2lpg_NumberOfEntitiesAcquired
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_OtherSubsidiaryMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
       
Number of VLGC vessels acquired                     1lpg_NumberOfVesselsAcquiredPerSubsidiary
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_OtherSubsidiaryMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
       
Number of VLGCs with option rights to construct                     1.5lpg_NumberOfVeryLargeGasCarrierConstructionOptionRights
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_OtherSubsidiaryMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
       
Amount paid for LPG coolant on board           $ 2,300,000lpg_PaymentForLPGCoolant
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
                 
Amount paid to reimburse for an advance for vessels under construction           7,400,000lpg_PaymentsToReimburseAdvanceOnVesselsUnderConstruction
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
                 
Fair value of total consideration                              
Cash     16,405,396us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    9,732,911us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
              6,672,485us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_GrendonTankerLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_AffiliatesOfDorianHoldingsLLCMember
 
Cash acquired from acquisition                     2,670,000us-gaap_CashAcquiredFromAcquisition
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_OtherSubsidiaryMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
       
Equity instruments     59,092,499us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    59,092,499us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
                 
Total consideration     75,497,895us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    68,825,410us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
              6,672,485us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_GrendonTankerLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_AffiliatesOfDorianHoldingsLLCMember
 
Number of shares acquired in exchange of common stock                         4,667,135us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
   
Fair value of identifiable assets and liabilities acquired:                              
Cash       2,672,500us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    2,672,500us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
               
Vessels       201,082,529lpg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedVessels
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= lpg_BusinessCombinationsMember
    194,457,529lpg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedVessels
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= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
              6,625,000lpg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedVessels
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= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_GrendonTankerLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_AffiliatesOfDorianHoldingsLLCMember
Inventories on board the vessels       1,455,107us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    1,407,622us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
              47,485us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ dei_LegalEntityAxis
= lpg_GrendonTankerLLCMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_AffiliatesOfDorianHoldingsLLCMember
Newbuilding vessels contracted for construction       17,593,130lpg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedVesselsUnderConstruction
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    17,593,130lpg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedVesselsUnderConstruction
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
               
Other assets - Vessel purchase options       4,605,000lpg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesPurchaseOption
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    4,605,000lpg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesPurchaseOption
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= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
               
Long term bank debt       (135,224,500)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    (135,224,500)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
               
Interest rate swaps       (16,685,871)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    (16,685,871)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
               
Net assets acquired - fair value       75,497,895us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
    68,825,410us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lpg_DorianHoldingsLLCMember
               
Value of common stock (per share) $ 12.66us-gaap_SharePrice
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/ us-gaap_StatementEquityComponentsAxis
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75.00us-gaap_SharePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
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/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
                         
Pro forma Information                              
Revenue relating to the Predecessor operations since acquisition date         29,633,700us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
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/ us-gaap_StatementScenarioAxis
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Net income relating to the Predecessor operations since acquisition date         3,152,335us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
= lpg_BusinessCombinationsMember
/ us-gaap_StatementScenarioAxis
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Net revenues         45,017,000us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
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/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
                   
Net income         $ 6,613,000us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
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