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Transactions with related parties - Optional Vessel acquisitions from Sponsor/ Omnibus Agreement (Details) - Legal right to acquire Sponsor's interests	12 Months Ended
	Dec. 31, 2019
Amended Omnibus Agreement
Related Party Transaction [Line Items]
LNG Carrier Capacity	172,000
Number Of Vessels	5
Vessel Type	ARC 7 LNG carrier
Amended Omnibus Agreement | Sponsor
Related Party Transaction [Line Items]
Percentage of ownership in entity	49.00%
Dynagas Holding Ltd
Related Party Transaction [Line Items]
Number Of Vessels	3

X

- Definition

The LNG carrier's capacity in cubic meters.

+ References

No definition available.

+ Details

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X

- Definition

Number of vessels owned and/ or to be acquired by the partnership.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

The type of vessel.

+ References

No definition available.

+ Details

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Balance Type:	na
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X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611443-123010

+ Details

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- Details

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X

- Details

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- Details

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X

- Details

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