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Inventory (Notes)
12 Months Ended
Dec. 31, 2014
Inventory, Net [Abstract]  
Inventory
Inventory
Inventories consisted of $10.3 million and $17.5 million of refined petroleum products as of December 31, 2014 and December 31, 2013, respectively. Cost of inventory is stated at the lower of cost or market on a first-in, first-out basis.