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Net Income Per Unit (Details) (USD $) In Thousands, except 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
Net income per unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to partners |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 71,997 dkl_NetIncomeLossAttributableToPartners | [1] | $ 47,830 dkl_NetIncomeLossAttributableToPartners | [1] | $ 8,410 dkl_NetIncomeLossAttributableToPartners | [1]
General partner's distribution |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,883 us-gaap_GeneralPartnerDistributions | [2] | 785 us-gaap_GeneralPartnerDistributions | [2] | 110 us-gaap_GeneralPartnerDistributions | [2]
Limited partners' distribution |  |  |  |  |  |  |  |  |  |  |  |  |  | 45,951 us-gaap_LimitedPartnersCapitalAccountDistributionAmount |  | 38,491 us-gaap_LimitedPartnersCapitalAccountDistributionAmount |  | 5,376 us-gaap_LimitedPartnersCapitalAccountDistributionAmount |
Earnings in excess of distributions |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,163 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities |  | 8,554 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities |  | 2,924 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities |
Weighted average limited partner units outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common units - (basic) |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,171,548 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding |  | 12,025,249 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding |  | 11,999,258 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding |
Common units - (diluted) |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,302,629 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted |  | 12,148,774 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted |  | 11,999,258 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted |
Subordinated units - Delek (basic and diluted) |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,999,258 dkl_WeightedAverageLimitedPartnerUnitsOutstandingSubordinatedUnitsBasicAndDiluted |  | 11,999,258 dkl_WeightedAverageLimitedPartnerUnitsOutstandingSubordinatedUnitsBasicAndDiluted |  | 11,999,258 dkl_WeightedAverageLimitedPartnerUnitsOutstandingSubordinatedUnitsBasicAndDiluted |
Net income per limited partner unit: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common units - (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 |
Subordinated units - Delek (basic and diluted) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.88 dkl_NetIncomeLossperSubordinatedunitbasicanddiluted |  | $ 1.95 dkl_NetIncomeLossperSubordinatedunitbasicanddiluted |  | $ 0.34 dkl_NetIncomeLossperSubordinatedunitbasicanddiluted |
Limited Partner, Common Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income per unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total earnings |  |  |  |  |  |  |  |  |  |  |  |  |  | 35,085 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = dkl_LimitedPartnerCommonUnitsMember |  | 23,490 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = dkl_LimitedPartnerCommonUnitsMember |  | 4,121 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = dkl_LimitedPartnerCommonUnitsMember |
Limited Partner, Subordinated Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income per unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total earnings |  |  |  |  |  |  |  |  |  |  |  |  |  | 34,546 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = dkl_LimitedPartnerSubordinatedUnitsMember |  | 23,383 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = dkl_LimitedPartnerSubordinatedUnitsMember |  | 4,121 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = dkl_LimitedPartnerSubordinatedUnitsMember |
General Partner |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income per unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
General partner's distribution |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,883 us-gaap_GeneralPartnerDistributions / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember | [2] | 785 us-gaap_GeneralPartnerDistributions / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember | [2] | 110 us-gaap_GeneralPartnerDistributions / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember | [2]
Earnings in excess of distributions |  |  |  |  |  |  |  |  |  |  |  |  |  | 483 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember |  | 172 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember |  | 58 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember |
Total earnings |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,366 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember |  | 957 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember |  | 168 us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarnings / us-gaap_PartnerCapitalComponentsAxis = us-gaap_GeneralPartnerMember |
Common Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income per unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partners' distribution |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,152 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |  | 19,292 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |  | 2,688 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |
Weighted average limited partner units outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common units - (basic) |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,171,548 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |  | 12,025,249 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1] | 11,999,258 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1]
Common units - (diluted) |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,302,629 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |  | 12,148,774 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1] | 11,999,258 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1]
Net income per limited partner unit: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common units - (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 | [3] | $ 0.46 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [4] | $ 0.51 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [3],[4] | $ 0.48 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [3],[4] | $ 0.50 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [3],[4] | $ 2.88 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |  | $ 1.95 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1] | $ 0.34 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1]
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 | [3] | $ 0.46 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [4] | $ 0.51 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [3],[4] | $ 0.47 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [3],[4] | $ 0.50 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [3],[4] | $ 2.85 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember |  | $ 1.93 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1] | $ 0.34 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember | [1]
Common Units [Member] | Limited Partner [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income per unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partners' distribution |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,152 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |  | 19,292 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |  | 2,688 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |
Earnings in excess of distributions |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,933 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |  | 4,198 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |  | 1,433 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_CommonUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |
Subordinated Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income per unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partners' distribution |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,799 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember |  | 19,199 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember |  | 2,688 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember |
Subordinated Units [Member] | Limited Partner [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income per unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partners' distribution |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,799 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |  | 19,199 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |  | 2,688 us-gaap_LimitedPartnersCapitalAccountDistributionAmount / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |
Earnings in excess of distributions |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,747 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |  | $ 4,184 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |  | $ 1,433 us-gaap_UndistributedEarningsAllocatedToParticipatingSecurities / us-gaap_LimitedPartnersCapitalAccountByClassAxis = dkl_SubordinatedUnitsMember / us-gaap_PartnerCapitalComponentsAxis = us-gaap_LimitedPartnerMember |
First target distribution [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Footnote [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution Payment Targets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.43125 dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_FirstTargetDistributionMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |
[1] | Adjusted to include the historical results of the El Dorado Terminal and Tank Assets. See Notes 1 and 3 for further discussion.
[2] | General partner distributions (including IDRs) consist of the 2% general partner interest and IDRs, which represent the right of the general partner to receive increasing percentages of quarterly distributions of available cash from operating surplus in excess of $0.43125 per unit per quarter. See Note 11 for further discussion related to IDRs.
[3] | The information presented includes the results of operations of the El Dorado Predecessor and the Tyler Predecessor
[4] | The information presented includes the results of operations of the El Dorado Predecessor.

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