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Transactions with related parties (Tables) | 12 Months Ended
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Dec. 31, 2017
Related Party Transaction, Due from (to) Related Party |
Related parties transactions |
|  |  | Year ended December 31,
|  |  | 2017 |  |  | 2016 |  | 2015
Included in voyage expenses |  |  |  |  |  |  |  |
Charter hire commissions (a) |  | $ | 1,830 |  | $ | 2,212 | $ | 1,821
Included in general and administrative expenses – related party |  |  |  |  |  |  |  |
Executive services fee (d) |  | $ | 605 |  | $ | 595 | $ | 599
Administrative services fee (e) |  | $ | 120 |  | $ | 120 | $ | 120
Management fees-related party |  |  |  |  |  |  |  |
Management fees (a) |  | $ | 6,162 |  | $ | 5,999 | $ | 4,870
Related parties balances |
|  |  | Year ended December 31,
|  |  | 2017 |  |  | 2016
Assets: |  |  |  |  |  |
Working capital advances granted to the Manager (a) |  | $ | 883 |  | $ | 878
Security deposits to Manager (a) |  | $ | 1,350 |  | $ | 1,350
Liabilities included in Due to related party: |  |  |  |  |  |
Executive service charges due to Manager (d) |  | $ | — |  | $ | 147
Administrative service charges due to Manager (e) |  | $ | 30 |  | $ | 30
Other Partnership expenses due to Manager |  | $ | 42 |  | $ | 125
Total liabilities due to related party, current |  | $ | 72 |  | $ | 302

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- Definition Tabular disclosure of related party transactions and resulting balances as included in the balance sheet. + References No definition available. + Details
Name: | dlng_RelatedPartyTransactionsBalancesTableTextBlock
Namespace Prefix: | dlng_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionDueFromToRelatedPartyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration