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v3.20.1

Partnership Formation and General Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended | 11 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 25, 2019 | Nov. 18, 2013 | Dec. 31, 2019 | Dec. 31, 2018
Related Party Transaction [Line Items] |  |  |  |
Date of incorporation |  |  | May 30, 2013 |
Working capital surplus/ (deficit) |  |  |  | $ (159,800)
IPO |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Date of initial public offering (IPO) |  |  | Nov. 18, 2013 |
$675 Million Senior Secured Term Loan Facility ($675 Million Credit Facility) |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Proceeds From Issuance Of Debt | $ 675,000 |  |  |
$480 Million Senior Secured Term Loan Facility (Term Loan B) |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount repaid | $ 470,400 |  |  |
Common | IPO |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Limited Partners Capital Account Units Offered |  | 8,250,000 |  |
Shares Issued, Price Per Share |  | $ 18 |  |
Dynagas Holding Ltd |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Ownership percentage |  |  | 44.00% |
Dynagas Holding Ltd | General Partner |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
General Partner Interest in Dynagas LNG Partners LP |  |  | 0.10% |
Dynagas Holding Ltd | Common | IPO |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Limited Partners Capital Account Units Offered |  | 4,250,000 |  |
Shares Issued, Price Per Share |  | $ 18 |  |
Dynagas Holding Ltd | $30 million Sponsor Facility |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 30,000 | $ 30,000 |
Line of credit facility, expiration date |  |  | Nov. 30, 2023 |
Dynagas Equity Holding Ltd. |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Date of incorporation |  |  | Dec. 19, 2018 |

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