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Equity Method Investments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 6,018,000us-gaap_EquityMethodInvestments	$ 0us-gaap_EquityMethodInvestments	[1]
Other Commitment	91.0us-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	$ 0.50us-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.

X

- Definition

The percentage of ownership of common stock or equity participation in the investee held by other investor accounted for under the equity method of accounting.

+ References

No definition available.

+ Details

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Namespace Prefix:	dkl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

X

- 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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X

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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- Details

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X

- Details

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