Name:	lpg_DebtInstrumentCovenantsMinimumConsolidatedEbitdaToConsolidatedNetInterestExpenseForNextNineMonths
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 consolidated liquidity if interest coverage ratio of consolidated EBTDA is less than required.

No definition available.

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

Not Available.

No definition available.

Name:	lpg_LongTermDebtCovenantsAbstract
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Data Type:	xbrli:stringItemType
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Not Available.

No definition available.

Name:	lpg_ShareBasedCompensationAwardsAbstract
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Data Type:	xbrli:stringItemType
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Period Type:	duration

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Percentage of vesting of share-based compensation awards.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of stock repurchase plan authorized.

No definition available.

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

Name:	us-gaap_TreasuryStockNumberOfSharesAndRestrictionDisclosuresAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_DebtInstrumentAxis=lpg_DebtFacility2015Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TitleOfIndividualAxis=lpg_CertainOfficersAndEmployeesMember
Namespace Prefix:
Data Type:	na
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