XML 64 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Net Income Per Unit - Narrative (Details) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Earnings Per Share [Abstract] |  |  |  |
General partner's ownership interest (as percent) | 2.00% | 2.00% | 2.00% | 2.00%
Quarterly distributions of available cash, minimum level (in dollars per share) |  |  | 0.43125 |

X
- Definition Minimum distribution per unit threshold to begin paying incentive distributions to general partner on a percentage scale, based on amounts in excess of distributions to Limited Partnership members or limited partners. + References No definition available. + Details
Name: | dkl_IncentiveDistributionMinimumDistributionLevel
Namespace Prefix: | dkl_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration