Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental Cash Flow Elements [Abstract]
Capital expenditures included in accounts payable at period end	$ 5,025	$ 4,283	$ 618
Capital lease obligation	4,032	0	0
Net liabilities not assumed by Tesoro Logistics LP	2,174	4,389	0
Transfer of property, plant and equipment (to) from Sponsor, net of accumulated depreciation	(1,017)	4,399	0
Receivable from affiliate for capital expenditures	$ 359	$ 3,069	$ 0