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Equity Method Investments (Details) (USD $) | Mar. 31, 2015 | Dec. 31, 2014
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Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investments | $ 6,018,000 us-gaap_EquityMethodInvestments | $ 0 us-gaap_EquityMethodInvestments | [1]
Other Commitment | 91.0 us-gaap_OtherCommitment |  |
CP LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage by Other Investor | 50.00%dkl_EquityMethodInvestmentOwnershipPercentagebyOtherInvestor / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dkl_CPLLCMember |  |
Equity method investments | $ 0.50 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dkl_CPLLCMember |  |
Rangeland Rio [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 33.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dkl_RangelandRioMember |  |
Equity Method Investment, Ownership Percentage by Other Investor | 67.00%dkl_EquityMethodInvestmentOwnershipPercentagebyOtherInvestor / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dkl_RangelandRioMember |  |
[1] | Adjusted to include the historical balances of the Logistics Assets Predecessor. See Notes 1 and 2 for further discussion.

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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 + Details
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