XML 40 R40.htm IDEA: XBRL DOCUMENT v2.4.0.8

Net Income Per Unit Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Income Per Unit [Abstract]
General partner's ownership interest	2.00%	2.00%	2.00%	2.00%

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- Details

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Namespace Prefix:	dk_
Data Type:	xbrli:stringItemType
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- 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://www.xbrl.org/2003/role/presentationRef

-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
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Data Type:	num:percentItemType
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