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Goodwill (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Goodwill, Impairment Loss	$ 11,700,000us-gaap_GoodwillImpairmentLoss		$ 0us-gaap_GoodwillImpairmentLoss		$ 0us-gaap_GoodwillImpairmentLoss
Goodwill [Roll Forward]
Beginning Balance	11,654,000us-gaap_Goodwill	[1]	10,454,000us-gaap_Goodwill		7,499,000us-gaap_Goodwill
Acquisitions			1,200,000us-gaap_GoodwillAcquiredDuringPeriod		2,955,000us-gaap_GoodwillAcquiredDuringPeriod
Ending Balance	11,654,000us-gaap_Goodwill		11,654,000us-gaap_Goodwill	[1]	10,454,000us-gaap_Goodwill
Wholesale Marketing and Terminalling
Goodwill [Roll Forward]
Beginning Balance			7,499,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember		7,499,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember
Acquisitions			0us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember		0us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember
Ending Balance	7,499,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember		7,499,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember		7,499,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_WholesaleMarketingAndTerminallingMember
Pipelines and Transportation
Goodwill [Roll Forward]
Beginning Balance			2,955,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember		0us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember
Acquisitions			1,200,000us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember		2,955,000us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember
Ending Balance	$ 4,155,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember		$ 4,155,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember		$ 2,955,000us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dkl_PipelinesAndTransportationMember
[1] Includes the historical balances of the El Dorado Terminal and Tank Assets. See Notes 1 and 3 for further discussion.

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB

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