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Inventory (Notes)
6 Months Ended
Jun. 30, 2016
Inventory [Abstract]  
Inventory
Inventory

Inventories consisted of $9.8 million and $10.5 million of refined petroleum products as of June 30, 2016 and December 31, 2015, respectively. Cost of inventory is stated at the lower of cost or market, with cost determined on a first-in, first-out basis.