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Acquisitions Pro Forma Infromation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
FTT Assets
Business Acquisition [Line Items]
Total operating revenues contributed	$ 531us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = dkl_FTTAssetsMember
Net income contributed	122us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = dkl_FTTAssetsMember
Net sales	854,842us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_FTTAssetsMember	921,017us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_FTTAssetsMember
Net income	71,820us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_FTTAssetsMember	34,433us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_FTTAssetsMember
Greenville-Mount Pleasant Assets
Business Acquisition [Line Items]
Total operating revenues contributed	172us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = dkl_GreenvilleMt.PleasantAssetsMember
Net income contributed	(109)us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = dkl_GreenvilleMt.PleasantAssetsMember
Net sales	841,943us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_GreenvilleMt.PleasantAssetsMember	908,118us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_GreenvilleMt.PleasantAssetsMember
Net income	70,617us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_GreenvilleMt.PleasantAssetsMember	33,230us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_GreenvilleMt.PleasantAssetsMember
North Little Rock Terminal
Business Acquisition [Line Items]
Net sales		908,867us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_NorthLittleRockTerminalMember	1,024,025us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_NorthLittleRockTerminalMember
Net income		34,958us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_NorthLittleRockTerminalMember	15,157us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_NorthLittleRockTerminalMember
Hopewell
Business Acquisition [Line Items]
Net sales		908,382us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_HopewellMember	1,023,540us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_HopewellMember
Net income		33,981us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_HopewellMember	14,180us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_HopewellMember
Nettleton and Big Sandy [Member]
Business Acquisition [Line Items]
Net sales			1,022,715us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = dkl_NettletonandBigSandyMember
Net income			$ 13,989us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dkl_NettletonandBigSandyMember

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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-Name Accounting Standards Codification

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