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Related Party Transactions Other Agreements (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012
Related Party Transaction [Line Items] |
Monthly Capacity Fee Revenue, Amount Received | $ 229,000
Minimum [Member] |
Related Party Transaction [Line Items] |
Monthly Capacity Fee Revenue Amount | 450,000
Maximum [Member] |
Related Party Transaction [Line Items] |
Monthly Capacity Fee Revenue Amount | $ 529,250

X
- Definition Monthly Capacity Fee Revenue Amount + References No definition available. + Details
Name: | dkl_MonthlyCapacityFeeRevenueAmount
Namespace Prefix: | dkl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Monthly Capacity Fee Revenue, Amount Received + References No definition available. + Details
Name: | dkl_MonthlyCapacityFeeRevenueAmountReceived
Namespace Prefix: | dkl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration