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Acquisitions Acquisitions from Third Parties Narrative (Details) | 0 Months Ended |
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Oct. 02, 2014 bbl | Dec. 17, 2014
Frank Thompson Transport [Member] |  |
Business Acquisition [Line Items] |  |
Number of trucks acquired |  | 120 dkl_Numberoftrucksacquired / us-gaap_BusinessAcquisitionAxis = dkl_FrankThompsonTransportMember
Number of trailers acquired |  | 200 dkl_Numberoftrailersacquired / us-gaap_BusinessAcquisitionAxis = dkl_FrankThompsonTransportMember
Mount Pleasant Terminal [Member] |  |
Business Acquisition [Line Items] |  |
Storage capacity (barrels) | 200,000 dkl_Storagecapacity / us-gaap_BusinessAcquisitionAxis = dkl_MountPleasantTerminalMember |
Greenville Storage Facility [Member] |  |
Business Acquisition [Line Items] |  |
Storage capacity (barrels) | 325,000 dkl_Storagecapacity / us-gaap_BusinessAcquisitionAxis = dkl_GreenvilleTerminalMember |

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- Definition Number of trailers acquired + References No definition available. + Details
Name: | dkl_Numberoftrailersacquired
Namespace Prefix: | dkl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of trucks acquired + References No definition available. + Details
Name: | dkl_Numberoftrucksacquired
Namespace Prefix: | dkl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Product storage capacity. + References No definition available. + Details
Name: | dkl_Storagecapacity
Namespace Prefix: | dkl_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=dkl_FrankThompsonTransportMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=dkl_GreenvilleTerminalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=dkl_MountPleasantTerminalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |