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