Concentration Risk (Notes)	3 Months Ended
Concentration Risk (Notes)	Mar. 31, 2015
Risks and Uncertainties [Abstract]
Concentration Risk Disclosure [Text Block]	14. Concentration Risk We are part of the consolidated operations of Western, and we derive a significant portion of our revenue from transactions with Western and its affiliates. Western accounted for approximately 29.3% and 25.5%, respectively, of our consolidated revenues for the three months ended March 31, 2015 and 2014. We sell a variety of refined products to a diverse customer base. Sales to Kroger Company accounted for 24.3% and 23.3% of consolidated net sales for the three months ended March 31, 2015 and 2014, respectively. Sales to Western’s retail group accounted for 22.5% and 21.1% of consolidated net sales for the three months ended March 31, 2015 and 2014, respectively. See Note 18, Related Party Transactions, for detailed information on our agreements with Western.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

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