Name:	lpg_DebtInstrumentCovenantsConsolidatedNetDebtToConsolidatedTotalCapitalizationRatio
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum ratio of current assets and long-term restricted cash divided by current liabilities required to be maintained as defined under the secured loan agreement.

No definition available.

Name:	lpg_DebtInstrumentCovenantsCurrentRatio
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the maximum ratio of total debt to shareholders funds required to be maintained as defined under the secured loan agreement.

No definition available.

Name:	lpg_DebtInstrumentCovenantsDebtEquityRatio
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum ratio of cash flow from operations before interest and finance cost to cash debt service costs required to be maintained as defined under the secured loan agreement.

No definition available.

Name:	lpg_DebtInstrumentCovenantsDebtServiceCoverageRatio
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the amount of dividend that can be paid if an event of default has occurred and is continuing, or if an event of default would result therefrom, or if the Company is not in compliance with any financial covenants or any payment of dividends or any form of distribution or return of capital would result in the Company not being in compliance with any of the financial covenants.

No definition available.

Name:	lpg_DebtInstrumentCovenantsDividendAmountIfEventOfDefault
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the minimum cash requirement covenant under scenario one, minimum cash balance.

No definition available.

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

Represents the minimum cash requirement covenant under scenario one, minimum cash balance for every vessel delivered and financed.

No definition available.

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

Represents the minimum cash requirement covenant under scenario two, percent of consolidated interest bearing debt outstanding.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumCAshRequirementAggregateScenarioTwoPercentOfConsolidatedInterestBearingDebtOutstanding
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum cash balance at the end of each quarter required to be maintained as defined under the secured loan agreement.

No definition available.

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

Represents the minimum cash balance per mortgaged vessel required to be maintained as defined under the secured loan agreement.

No definition available.

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

Represents the minimum interest coverage covenant, minimum consolidated EBITDA to consolidated net interest expense for the first twelve months.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumConsolidatedEbitdaToConsolidatedNetInterestExpenseForFirstTwelveMonths
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum interest coverage covenant, minimum consolidated EBITDA to consolidated net interest expense for the second year.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumConsolidatedEbitdaToConsolidatedNetInterestExpenseForSecondYear
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum interest coverage covenant, minimum consolidated EBITDA to consolidated net interest expense for thereafter.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumConsolidatedEbitdaToConsolidatedNetInterestExpenseForThereafter
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum interest coverage covenant, minimum consolidated EBITDA to consolidated net interest expense for the third year.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumConsolidatedEbitdaToConsolidatedNetInterestExpenseForThirdYear
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum ownership level of the entity's common shares.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumOwnershipLevel
Namespace Prefix:	lpg_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

Represents the minimum percent of aggregate market value of vessels securing loan and related swap exposure.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumPercentOfAggregateMarketValueOfVesselsSecuringLoanAndRelatedSwapExposure
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum percentage of any additional security then held by the security agent to the outstanding loan balance.

No definition available.

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

Represents the amount of minimum shareholders' funds as adjusted as defined under the secured loan agreement.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumShareholdersFundAsAdjusted
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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 minimum stockholders equity covenant, percent of new equity raised after closing date.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumStockholdersEquityPercentOfNewEquityRaisedAfterClosingDate
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the minimum stockholders equity covenant, percent of positive net income from immediately preceding fiscal year.

No definition available.

Name:	lpg_DebtInstrumentCovenantsMinimumStockholdersEquityPercentOfPositiveNetIncomeForImmediatelyPrecedingFiscalYear
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percent of related swap exposure added to the market value of the vessels securing the loan.

No definition available.

Name:	lpg_DebtInstrumentCovenantsPercentOfRelatedSwapExposureAddedToMarketValueOfVesselsSecuringLoan
Namespace Prefix:	lpg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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

Percentage of principal amount of debt redeemed.

No definition available.