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Selected Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 173,347 us-gaap_SalesRevenueNet | $ 228,036 us-gaap_SalesRevenueNet | $ 236,343 us-gaap_SalesRevenueNet | $ 203,527 us-gaap_SalesRevenueNet | [1] | $ 223,097 us-gaap_SalesRevenueNet | [2] | $ 243,295 us-gaap_SalesRevenueNet | [1],[2] | $ 230,141 us-gaap_SalesRevenueNet | [1],[2] | $ 210,894 us-gaap_SalesRevenueNet | [1],[2] | $ 841,253 us-gaap_SalesRevenueNet | [3],[4] | $ 907,428 us-gaap_SalesRevenueNet | [5],[6],[7] | $ 1,022,586 us-gaap_SalesRevenueNet | [5],[6],[7]
Operating income | 22,118 us-gaap_OperatingIncomeLoss | 17,488 us-gaap_OperatingIncomeLoss | 24,377 us-gaap_OperatingIncomeLoss | 15,859 us-gaap_OperatingIncomeLoss | [1] | 12,355 us-gaap_OperatingIncomeLoss | [2] | 10,986 us-gaap_OperatingIncomeLoss | [1],[2] | 7,443 us-gaap_OperatingIncomeLoss | [1],[2] | 8,210 us-gaap_OperatingIncomeLoss | [1],[2] | 79,842 us-gaap_OperatingIncomeLoss | [3],[4],[7] | 38,994 us-gaap_OperatingIncomeLoss | [5],[6],[7] | 2,524 us-gaap_OperatingIncomeLoss | [5],[6],[7]
Net income | 20,486 us-gaap_NetIncomeLoss | 15,085 us-gaap_NetIncomeLoss | 21,754 us-gaap_NetIncomeLoss | 13,729 us-gaap_NetIncomeLoss | [1] | 10,338 us-gaap_NetIncomeLoss | [2] | 9,485 us-gaap_NetIncomeLoss | [1],[2] | 6,573 us-gaap_NetIncomeLoss | [1],[2] | 7,271 us-gaap_NetIncomeLoss | [1],[2] | 71,054 us-gaap_NetIncomeLoss |  | 33,667 us-gaap_NetIncomeLoss | [7],[8] | 13,866 us-gaap_NetIncomeLoss | [7],[8]
Limited partners' interest in net income | $ 19,631 us-gaap_NetIncomeLossAllocatedToLimitedPartners | $ 14,487 us-gaap_NetIncomeLossAllocatedToLimitedPartners | $ 21,134 us-gaap_NetIncomeLossAllocatedToLimitedPartners | $ 14,379 us-gaap_NetIncomeLossAllocatedToLimitedPartners | [1] | $ 11,098 us-gaap_NetIncomeLossAllocatedToLimitedPartners | [2] | $ 12,295 us-gaap_NetIncomeLossAllocatedToLimitedPartners | [1],[2] | $ 11,521 us-gaap_NetIncomeLossAllocatedToLimitedPartners | [1],[2] | $ 11,960 us-gaap_NetIncomeLossAllocatedToLimitedPartners | [1],[2] | $ 69,631 us-gaap_NetIncomeLossAllocatedToLimitedPartners |  | $ 46,873 us-gaap_NetIncomeLossAllocatedToLimitedPartners | [7] | $ 8,242 us-gaap_NetIncomeLossAllocatedToLimitedPartners | [7]
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common (basic) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.88 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax |  | $ 1.95 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax |  | $ 0.34 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax |
Common units - (diluted) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.85 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted |  | $ 1.93 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted |  | $ 0.34 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted |
Common Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common (basic) | $ 0.81 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | $ 0.60 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | $ 0.88 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | $ 0.60 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1] | $ 0.46 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [2] | $ 0.51 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1],[2] | $ 0.48 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1],[2] | $ 0.50 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1],[2] | $ 2.88 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |  | $ 1.95 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [7] | $ 0.34 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [7]
Common units - (diluted) | $ 0.80 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | $ 0.59 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | $ 0.87 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | $ 0.59 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1] | $ 0.46 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [2] | $ 0.51 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1],[2] | $ 0.47 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1],[2] | $ 0.50 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1],[2] | $ 2.85 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |  | $ 1.93 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [7] | $ 0.34 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [7]
Subordinated- Delek |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subordinated units - Delek (basic and diluted) | $ 0.81 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | $ 0.60 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | $ 0.87 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | $ 0.60 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | [1] | $ 0.46 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | [2] | $ 0.51 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | [1],[2] | $ 0.48 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | [1],[2] | $ 0.50 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | [1],[2] | $ 2.88 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember |  | $ 1.95 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | [7] | $ 0.34 us-gaap_IncomeLossFromContinuingOperationsPerOutstandingLimitedPartnershipAndGeneralPartnershipUnitBasicAndDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedDelekMember | [7]
[1] | The information presented includes the results of operations of the El Dorado Predecessor and the Tyler Predecessor
[2] | The information presented includes the results of operations of the El Dorado Predecessor.
[3] | The information presented includes the results of operations of the El Dorado Terminal and Tank Assets and the Tyler Terminal and Tank Assets. Prior to the El Dorado Acquisition and the Tyler Acquisition, the El Dorado Predecessor and the Tyler Predecessor did not record all revenues for intercompany gathering, pipeline transportation, terminalling and storage services.
[4] | Capital spending includes expenditures incurred in connection with the assets acquired in the El Dorado Acquisition and the Tyler Acquisition.
[5] | Capital spending includes expenditures incurred in connection with the assets acquired in the El Dorado Acquisition
[6] | The information presented includes the results of operations of the El Dorado Terminal and Tank Assets. Prior to the El Dorado Acquisition, the El Dorado Predecessor did not record all revenues for intercompany gathering, pipeline transportation, terminalling and storage services.
[7] | Adjusted to include the historical results of the El Dorado Terminal and Tank Assets. See Notes 1 and 3 for further discussion.
[8] | Adjusted to include the historical cash flows of the El Dorado Terminal and Tank Assets. See Notes 1 and 3 for further discussion.

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