Additional basis points to decrease the margin.

No definition available.

Name:	lpg_AdditionalBasisPointsToDecreaseMargin
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Additional basis points to increase the margin.

+ References

No definition available.

+ Details

Name:	lpg_AdditionalBasisPointsToIncreaseMargin
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Basis points receivable as increase or reduction for changes in Average Efficiency Ratio.

+ References

No definition available.

+ Details

Name:	lpg_BasisPointsReceivableAsIncreaseOrReductionForChangesInAverageEfficiencyRatio
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the maximum ratio of consolidated net debt to consolidated total capitalization as defined under the secured loan agreement.

+ References

No definition available.

+ Details

Name:	lpg_DebtInstrumentCovenantsConsolidatedNetDebtToConsolidatedTotalCapitalizationRatio
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

Name:	lpg_DebtInstrumentCovenantsCurrentRatio
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the minimum stockholders equity covenant, stockholders equity balance.

+ References

No definition available.

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Percentage points added to the Secured Overnight Financing Rate (SOFR) to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	lpg_MarginAddedToSofrForInterestRateOnLoanFacilityAsPercent
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of minimum liquidity covenant.

+ References

No definition available.

+ Details

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

- Definition

Percentage of increase in security value ratio.

+ References

No definition available.

+ Details

Name:	lpg_PercentageOfIncreaseInSecurityValueRatio
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of total interest bearing debt, used to measure liquidity covenants for the 2022 deft facility.

+ References

No definition available.

+ Details

Name:	lpg_PercentageOfInterestBearingDebt
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of long-term debt classified as non-current reclassified to current portion of long-term debt for the period.

+ References

No definition available.

+ Details

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

- Definition

Security leverage ratio.

+ References

No definition available.

+ Details

Name:	lpg_SecurityLeverageRatio
Namespace Prefix:	lpg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

+ Details

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

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6935-107765

+ Details

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

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

+ Details

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

- Definition

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.

+ References

No definition available.

+ Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=lpg_DebtFacility2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=lpg_RevolvingCreditFacility2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Subsequent Events (Details) - USD ($)	Aug. 03, 2022	Jul. 29, 2022	Jul. 21, 2022	May 04, 2022	Sep. 02, 2022	Jun. 30, 2022	Jun. 06, 2022	Jun. 02, 2022	Mar. 31, 2022
Subsequent Event
Dividends declared (in dollars per share)				$ 2.50
Dividends payable						$ 919,643		$ 600,000	$ 494,180
Corvette Japanese Financing
Subsequent Event
Deposit retained by buyer used for purchase payment							$ 14,000,000.0
Subsequent events
Subsequent Event
Dividends declared (in dollars per share)	$ 1.00
Dividends payable					$ 40,100,000
Subsequent events \| 2022 Debt Facility
Subsequent Event
Original loan amount		$ 260,000,000
Percentage Of Increase In Security Value Ratio		145.00%
Additional Basis Points To Decrease Margin		0.05%
Additional Basis Points To Increase Margin		0.05%
Basis Points Receivable As Increase Or Reduction For Changes In Average Efficiency Ratio		0.05%
Reclassifications of long-term debt to current		$ 2,500,000
Subsequent events \| 2022 Debt Facility \| Minimum
Subsequent Event
Debt Instrument Covenants Current Ratio		100.00%
Debt Instrument Covenants Minimum Stockholders Equity Balance		$ 400,000,000
Debt Instrument Covenants Consolidated Net Debt to Consolidated Total Capitalization Ratio		60.00%
Minimum Liquidity Covenant		$ 27,500,000
Percentage Of Interest Bearing Debt		5.00%
Security Leverage Ratio		35.00%
Subsequent events \| 2022 Debt Facility \| Maximum
Subsequent Event
Debt Instrument Covenants Consolidated Net Debt to Consolidated Total Capitalization Ratio		100.00%
Security Leverage Ratio		45.00%
Subsequent events \| 2022 Term Loan Facility
Subsequent Event
Original loan amount		$ 240,000,000
Loan term period		7 years
Margin added to SOFR for interest rate on loan facility (as a percent)		2.20%
Subsequent events \| 2022 Revolving Credit Facility
Subsequent Event
Original loan amount		$ 20,000,000
Subsequent events \| Corvette LPG Transport LLC \| Corvette Japanese Financing
Subsequent Event
Repayment of debt			$ 42,200,000
Deposit retained by buyer used for purchase payment			$ 14,000,000.0