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Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 293,525us-gaap_PropertyPlantAndEquipmentGross	$ 264,072us-gaap_PropertyPlantAndEquipmentGross	[1]
Less: accumulated depreciation	(52,992)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	(39,566)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	[1]
Property, plant and equipment, net	240,533us-gaap_PropertyPlantAndEquipmentNet	224,506us-gaap_PropertyPlantAndEquipmentNet	[1]
Depreciation expense	13,642us-gaap_DepreciationNonproduction	12,675us-gaap_DepreciationNonproduction
Pipelines and Transportation
Property, Plant and Equipment [Line Items]
Property, plant and equipment	227,927us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember	200,001us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember
Less: accumulated depreciation	(36,459)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember	(25,128)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember
Property, plant and equipment, net	191,468us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember	174,873us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember
Depreciation expense	10,395us-gaap_DepreciationNonproduction / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember	9,928us-gaap_DepreciationNonproduction / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember
Wholesale Marketing and Terminalling
Property, Plant and Equipment [Line Items]
Property, plant and equipment	65,598us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember	64,071us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember
Less: accumulated depreciation	(16,533)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember	(14,438)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember
Property, plant and equipment, net	49,065us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember	49,633us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember
Depreciation expense	3,247us-gaap_DepreciationNonproduction / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember	2,747us-gaap_DepreciationNonproduction / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember	1,931us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember
Building and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	1,169us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BuildingAndBuildingImprovementsMember	1,057us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BuildingAndBuildingImprovementsMember
Pipelines and terminals
Property, Plant and Equipment [Line Items]
Property, plant and equipment	266,196us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = dkl_PipelinesAndTerminalsMember	229,672us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = dkl_PipelinesAndTerminalsMember
Asset retirement obligations
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,073us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_AssetRetirementObligationCostsMember	1,999us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_AssetRetirementObligationCostsMember
Other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment	3,764us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember	2,959us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember
Construction in process
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 18,323us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_ConstructionInProgressMember	$ 26,454us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_ConstructionInProgressMember
[1] Includes the historical balances of the El Dorado Terminal and Tank Assets. See Notes 1 and 3 for further discussion.

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

-Paragraph 1

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-Name Regulation S-X (SX)

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+ References

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+ References

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