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Major Customer and Concentrations of Credit Risk (Notes)	3 Months Ended
	Mar. 31, 2014
Major Customer and Concentrations of Credit Risk [Abstract]
Major Customer and Concentrations of Credit Risk	MAJOR CUSTOMER AND CONCENTRATIONS OF CREDIT RISK Tesoro accounted for 88% and 93% of our total revenues for the three months ended March 31, 2014 and 2013, respectively.

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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