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Acquisitions El Dorado and Tyler Acquisitions (Details) (USD $) | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 26, 2013 bbl | Dec. 31, 2014 | Feb. 10, 2014 bbl | Dec. 31, 2013
Tyler Terminal and Tanks [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash paid for acquisition | $ 94,800,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = dkl_TylerTerminalandTanksMember | $ 94,800,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = dkl_TylerTerminalandTanksMember |  |
Total Throughput Capacity (bpd) | 72,000 dkl_TotalThroughputCapacity / us-gaap_BusinessAcquisitionAxis = dkl_TylerTerminalandTanksMember |  |  |
Number of Storage Tanks | 96 dkl_NumberofStorageTanks / us-gaap_BusinessAcquisitionAxis = dkl_TylerTerminalandTanksMember |  |  |
Aggregate Shell Capacity (barrels) | 2,000,000 dkl_AggregateShellCapacity / us-gaap_BusinessAcquisitionAxis = dkl_TylerTerminalandTanksMember |  |  |
Historical carrying value of assets | 38,300,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dkl_TylerTerminalandTanksMember |  |  |
El Dorado Terminal and Tanks [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash paid for acquisition |  |  | 95,900,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember | 95,900,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember
Total Throughput Capacity (bpd) |  |  | 26,700 dkl_TotalThroughputCapacity / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember |
Number of Storage Tanks |  |  | 158 dkl_NumberofStorageTanks / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember |
Aggregate Shell Capacity (barrels) |  |  | 2,500,000 dkl_AggregateShellCapacity / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember |
Historical carrying value of assets |  |  | 25,200,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember |
Total operating revenues |  | 15,809,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember |  |
Net income attributable to the Partnership |  | 10,481,000 us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember |  |
General and Administrative Expense [Member] | El Dorado Terminal and Tanks [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Costs associated with the acquisition |  | $ 186,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_BusinessAcquisitionAxis = dkl_ElDoradoTerminalandTanksMember / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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