Basis of Presentation and General Information (General) (Details)	9 Months Ended
Dec. 31, 2021 item
Basis of Presentation and General Information
Total number of vessels	23
Number of fuel-efficient ECO-design VLGCs having 84,000 cbm	19
Number of VLGCs having 82,000 cbm	2
Number of time chartered-in VLGC	2
The number of vessels that have exhaust gas cleaning systems	13
The number of chartered-in vessels that have exhaust gas cleaning systems	1

The number of chartered-in vessels that have exhaust gas cleaning systems.

No definition available.

Name:	lpg_NumberOfCharteredInVesselsThatHaveExhaustGasCleaningScrubbers
Namespace Prefix:	lpg_
Data Type:	xbrli:integerItemType
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Period Type:	instant

Represents the number of fuel-efficient Eco-design Very Large Gas Carrier vessels in current fleet having a capacity of 84,000 cubic meters.

No definition available.

Name:	lpg_NumberOfFuelEfficientVeryLargeGasCarrierVesselsEightyFourThousandCapacity
Namespace Prefix:	lpg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of very large gas carrier VLGC time chartered-in vessels.

No definition available.

Name:	lpg_NumberOfVeryLargeGasCarrierTimeCharteredInVessels
Namespace Prefix:	lpg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the number of Very Large Gas Carrier vessels in current fleet having a capacity of 82,000 cubic meters.

No definition available.

Name:	lpg_NumberOfVeryLargeGasCarrierVesselsEightyTwoThousandCapacity
Namespace Prefix:	lpg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the total number of vessels owned by the entity.

No definition available.

The number of vessels that have exhaust gas cleaning systems.

No definition available.

Name:	lpg_NumberOfVesselsThatHaveExhaustGasCleaningScrubbers
Namespace Prefix:	lpg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

No definition available.

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration