Represents the amount of time charter revenue.

No definition available.

Name:	lpg_TimeCharterRevenue
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of profit sharing revenue included in time charter revenues.

+ References

No definition available.

+ Details

Name:	lpg_TimeChartersProfitSharingRevenue
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of voyage charter revenue.

+ References

No definition available.

+ Details

Name:	lpg_VoyageCharterRevenue
Namespace Prefix:	lpg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Revenues from the sale of other goods or rendering of other services, not elsewhere specified in the taxonomy; net of (reduced by) sales adjustments, returns, allowances, and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a),(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_OtherSalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

Revenues (Details) (USD $)	3 Months Ended							9 Months Ended	12 Months Ended
Revenues (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Mar. 31, 2014	Mar. 31, 2015
Revenues.
Voyage charter revenues								$ 11,210,785lpg_VoyageCharterRevenue	$ 77,331,934lpg_VoyageCharterRevenue
Time charter revenues								17,602,137lpg_TimeCharterRevenue	26,098,290lpg_TimeCharterRevenue
Other revenues								820,778us-gaap_OtherSalesRevenueNet	698,925us-gaap_OtherSalesRevenueNet
Total	35,333,108us-gaap_Revenues	32,583,990us-gaap_Revenues	20,358,211us-gaap_Revenues	15,853,840us-gaap_Revenues	9,870,427us-gaap_Revenues	13,707,591us-gaap_Revenues	6,055,682us-gaap_Revenues	29,633,700us-gaap_Revenues	104,129,149us-gaap_Revenues
Profit-sharing sharing revenue								$ 6,100,000lpg_TimeChartersProfitSharingRevenue	$ 7,800,000lpg_TimeChartersProfitSharingRevenue