Related-Party Transactions (Tables)

3 Months Ended

Mar. 31, 2014

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

A summary of revenue and expense transactions with Tesoro is as follows (in thousands):

	Three Months Ended March 31,
	2014		2013
Revenues	$	109,580	$	47,892
Operating and maintenance expenses (a)	10,271		3,397
General and administrative expenses	7,480		2,826

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(a) Operating and maintenance expenses include imbalance settlement gains of $2.4 million for both the three months ended March 31, 2014 and 2013.