Name:	lpg_DebtInstrumentCovenantsMinimumCashBalancePerMortgageVesselFromFirstAnniversaryThroughThereafter
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the minimum stockholders equity covenant, stockholders equity balance.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumStockholdersEquityBalance
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the deposit value held by the buyer from sale of property, plant and equipment.

No definition available.

Name:	lpg_DepositHeldByBuyerFromSaleOfPropertyPlantAndEquipment
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of minimum liquidity covenant.

No definition available.

Name:	lpg_MinimumLiquidityCovenant
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Percentage of increase in security value ratio.

No definition available.

Name:	lpg_PercentageOfIncreaseInSecurityValueRatio
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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

Name:	us-gaap_DebtInstrumentAxis=lpg_TwoThousandFifteenArFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=lpg_CJNPLPGTransportLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: