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Segment Data (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Net Sales:      
Affiliate $ 32,280us-gaap_RevenueFromRelatedParties [1] $ 25,282us-gaap_RevenueFromRelatedParties [2]  
Third-Party 111,232us-gaap_SalesRevenueServicesNet [1] 178,245us-gaap_SalesRevenueServicesNet [2]  
Net sales 143,512us-gaap_SalesRevenueNet [1] 203,527us-gaap_SalesRevenueNet [2],[3]  
Operating costs and expenses:      
Cost of goods sold 108,407us-gaap_CostOfGoodsSold [1] 172,209us-gaap_CostOfGoodsSold [2],[3]  
Operating expenses 10,777us-gaap_OperatingCostsAndExpenses [1],[4] 9,496us-gaap_OperatingCostsAndExpenses [2],[3],[5]  
Segment contribution margin 24,328dkl_SegmentContributionMargin 21,822dkl_SegmentContributionMargin  
General and administrative expenses 3,409us-gaap_SellingGeneralAndAdministrativeExpense [1] 2,663us-gaap_SellingGeneralAndAdministrativeExpense [2],[3]  
Depreciation and amortization 4,500us-gaap_DepreciationAndAmortization [1] 3,477us-gaap_DepreciationAndAmortization [2],[3]  
Loss on asset disposals 5us-gaap_GainLossOnDispositionOfAssets [1],[6] 0us-gaap_GainLossOnDispositionOfAssets [2],[7]  
Operating income 16,414us-gaap_OperatingIncomeLoss [1] 15,682us-gaap_OperatingIncomeLoss [2],[3]  
Capital spending (excluding business combinations) 7,573us-gaap_PaymentsToAcquirePropertyPlantAndEquipment [4],[6] 2,316us-gaap_PaymentsToAcquirePropertyPlantAndEquipment [5],[7]  
Total assets 332,556us-gaap_Assets   331,565us-gaap_Assets [8]
Pipelines and Transportation [Member]      
Net Sales:      
Affiliate 23,985us-gaap_RevenueFromRelatedParties
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 17,501us-gaap_RevenueFromRelatedParties
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		  
Third-Party 7,017us-gaap_SalesRevenueServicesNet
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 2,767us-gaap_SalesRevenueServicesNet
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		  
Net sales 31,002us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 20,268us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		  
Operating costs and expenses:      
Cost of goods sold 4,813us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 1,126us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		  
Operating expenses 6,918us-gaap_OperatingCostsAndExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 [4] 7,176us-gaap_OperatingCostsAndExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 [5]  
Segment contribution margin 19,271dkl_SegmentContributionMargin
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 11,966dkl_SegmentContributionMargin
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		  
Capital spending (excluding business combinations) 4,553us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 [4] 2,288us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		 [5]  
Total assets 287,104us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember		   230,572us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_PipelinesAndTransportationMember
Wholesale Marketing and Terminalling [Member]      
Net Sales:      
Affiliate 8,295us-gaap_RevenueFromRelatedParties
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		 7,781us-gaap_RevenueFromRelatedParties
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		  
Third-Party 104,215us-gaap_SalesRevenueServicesNet
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		 175,478us-gaap_SalesRevenueServicesNet
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		  
Net sales 112,510us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		 183,259us-gaap_SalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		  
Operating costs and expenses:      
Cost of goods sold 103,594us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		 171,083us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		  
Operating expenses 3,859us-gaap_OperatingCostsAndExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		 2,320us-gaap_OperatingCostsAndExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		  
Segment contribution margin 5,057dkl_SegmentContributionMargin
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		 9,856dkl_SegmentContributionMargin
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		  
Capital spending (excluding business combinations) 3,020us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		 28us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		  
Total assets $ 45,452us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember		   $ 100,993us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= dkl_WholesaleMarketingAndTerminallingMember
[1] The information presented includes the results of operations of the Logistics Assets Predecessor. Prior to the El Dorado Offloading Racks Acquisition and the Tyler Crude Tank Acquisition, the Logistics Assets Predecessor did not record revenues for intercompany throughput and storage services. See Notes 1 and 2 for further discussion.
[2] Adjusted to include the historical results of the Logistics Assets Predecessor. See Notes 1 and 2 for further discussion.
[3] There were no revenues or expenses associated with the Tyler Assets Predecessor included in our condensed consolidated financial statements for the three months ended March 31, 2014 as the Tyler Assets were not fully constructed and were not placed into service until January 2015.
[4] Includes operating expenses and capital spending expenditures incurred in connection with the El Dorado Offloading Racks Acquisition and the Tyler Crude Tank Acquisition for the three months ended March 31, 2015.
[5] Adjusted to include operating expenses and capital spending expenditures incurred in connection with the assets acquired in the El Dorado Offloading Racks Acquisition and the Tyler Crude Tank Acquisition for the three months ended March 31, 2014.
[6] Includes the historical cash flows of the Logistics Assets Predecessor. See Notes 1 and 2 for further discussion.
[7] Adjusted to include the historical cash flows of the Logistics Assets Predecessor. See Notes 1 and 2 for further discussion.
[8] Adjusted to include the historical balances of the Logistics Assets Predecessor. See Notes 1 and 2 for further discussion.