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Commitments and Contingencies Crude Oil Releases (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Loss Contingencies [Line Items] |  |  |
Pipeline release liabilities | $ 1,899,000 dkl_Pipelinereleaseliabilitiescurrent | $ 0 dkl_Pipelinereleaseliabilitiescurrent | [1]
Haynesville Crude Oil Release [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Pipeline release liabilities | 600,000 dkl_Pipelinereleaseliabilitiescurrent / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_HaynesvilleCrudeOilReleaseMember |  |
Maximum Exposure for Environmental Remediation under Omnibus Agreement | 1,000,000 dkl_MaximumExposureForEnvironmentalRemediationUnderOmnibusAgreement / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_HaynesvilleCrudeOilReleaseMember |  |
Magnolia Station Spill [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Pipeline release liabilities | 0 dkl_Pipelinereleaseliabilitiescurrent / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_MagnoliaStationSpillMember |  |
Maximum Exposure for Environmental Remediation under Omnibus Agreement | 300,000 dkl_MaximumExposureForEnvironmentalRemediationUnderOmnibusAgreement / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_MagnoliaStationSpillMember |  |
Macedonia Crude Oil Release [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Pipeline release liabilities | 1,300,000 dkl_Pipelinereleaseliabilitiescurrent / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_MacedoniaCrudeOilReleaseMember |  |
Maximum Exposure for Environmental Remediation under Omnibus Agreement | 300,000 dkl_MaximumExposureForEnvironmentalRemediationUnderOmnibusAgreement / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_MacedoniaCrudeOilReleaseMember |  |
Operating Expense [Member] | Haynesville Crude Oil Release [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Cost incurred for environmental remediation | 1,000,000 dkl_Costincurredforenvironmentalremediation / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_HaynesvilleCrudeOilReleaseMember |  |
Operating Expense [Member] | Magnolia Station Spill [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Cost incurred for environmental remediation | 0 dkl_Costincurredforenvironmentalremediation / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_MagnoliaStationSpillMember | 300,000 dkl_Costincurredforenvironmentalremediation / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_MagnoliaStationSpillMember |
Operating Expense [Member] | Macedonia Crude Oil Release [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Cost incurred for environmental remediation | $ 0 dkl_Costincurredforenvironmentalremediation / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_MacedoniaCrudeOilReleaseMember | $ 300,000 dkl_Costincurredforenvironmentalremediation / us-gaap_IncomeStatementLocationAxis = us-gaap_OperatingExpenseMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = dkl_MacedoniaCrudeOilReleaseMember |
[1] | Includes the historical balances of the El Dorado Terminal and Tank Assets. See Notes 1 and 3 for further discussion.

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