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Equity Incentive Distribution Rights (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Minimum quarterly distribution [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Distribution Payment Targets	$ 0.37500dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_MinimumQuarterlyDistributionMember
Minimum quarterly distribution [Member] | Limited Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	98.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_MinimumQuarterlyDistributionMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_LimitedPartnerMember
Minimum quarterly distribution [Member] | General Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	2.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_MinimumQuarterlyDistributionMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_GeneralPartnerMember
First target distribution [Member] | Minimum [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Distribution Payment Targets	$ 0.37500dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_FirstTargetDistributionMember / us-gaap_RangeAxis = us-gaap_MinimumMember
First target distribution [Member] | Maximum [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Distribution Payment Targets	$ 0.43125dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_FirstTargetDistributionMember / us-gaap_RangeAxis = us-gaap_MaximumMember
First target distribution [Member] | Limited Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	98.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_FirstTargetDistributionMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_LimitedPartnerMember
First target distribution [Member] | General Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	2.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_FirstTargetDistributionMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_GeneralPartnerMember
Second target distribution [Member] | Minimum [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Distribution Payment Targets	$ 0.43125dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_SecondTargetDistributionMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Second target distribution [Member] | Maximum [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Distribution Payment Targets	$ 0.46875dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_SecondTargetDistributionMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Second target distribution [Member] | Limited Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	85.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_SecondTargetDistributionMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_LimitedPartnerMember
Second target distribution [Member] | General Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	15.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_SecondTargetDistributionMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_GeneralPartnerMember
Third target distribution [Member] | Minimum [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Distribution Payment Targets	$ 0.46875dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_ThirdTargetDistributionMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Third target distribution [Member] | Maximum [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Distribution Payment Targets	$ 0.56250dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_ThirdTargetDistributionMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Third target distribution [Member] | Limited Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	75.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_ThirdTargetDistributionMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_LimitedPartnerMember
Third target distribution [Member] | General Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	25.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_ThirdTargetDistributionMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_GeneralPartnerMember
Thereafter [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Distribution Payment Targets	$ 0.56250dkl_DistributionPaymentTargets / dkl_IncentiveDistributionByTargetAxis = dkl_ThereafterMember
Thereafter [Member] | Limited Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	50.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_ThereafterMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_LimitedPartnerMember
Thereafter [Member] | General Partner [Member]
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Incentive Distribution Distribution Split Marginal Percentage	50.00%dkl_IncentiveDistributionDistributionSplitMarginalPercentage / dkl_IncentiveDistributionByTargetAxis = dkl_ThereafterMember / us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerAxis = us-gaap_GeneralPartnerMember

X

- Definition

Total quarterly distribution payment target amount

+ References

No definition available.

+ Details

Name:	dkl_DistributionPaymentTargets
Namespace Prefix:	dkl_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage split between the limited partners' and general partner's interests in distributions.

+ References

No definition available.

+ Details

Name:	dkl_IncentiveDistributionDistributionSplitMarginalPercentage
Namespace Prefix:	dkl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_IncentiveDistributionMadeToManagingMemberOrGeneralPartnerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dkl_IncentiveDistributionByTargetAxis=dkl_FirstTargetDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dkl_IncentiveDistributionByTargetAxis=dkl_MinimumQuarterlyDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dkl_IncentiveDistributionByTargetAxis=dkl_SecondTargetDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dkl_IncentiveDistributionByTargetAxis=dkl_ThereafterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dkl_IncentiveDistributionByTargetAxis=dkl_ThirdTargetDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: