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Accounting Policies Inventory (Details) - Supplier Concentration Risk [Member] - Inventory purchased [Member] - Wholesale Marketing and Terminalling
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Concentration Risk [Line Items]      
Concentration Risk, Percentage 62.60% 69.00% 96.10%
Number Of Suppliers 1 1 2
Delek US [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 24.90%