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Related Party Transactions Summary of Transactions (Details) - Delek US and affiliates - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Related Party Transaction [Line Items]        
Revenues $ 39,824 $ 36,694 $ 76,443 $ 75,454
General and administrative expenses 1,561 1,608 3,254 2,954
Cost of goods sold        
Related Party Transaction [Line Items]        
Operating and maintenance expenses 8,252 8,127 17,180 18,817
Operating Expense [Member]        
Related Party Transaction [Line Items]        
Operating and maintenance expenses $ 6,385 $ 7,085 $ 13,481 $ 14,750