Organization and Basis of Presentation (Details)	12 Months Ended			0 Months Ended								12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Oct. 05, 2012 Common	Apr. 26, 2011 Common	Dec. 31, 2012 Crude oil gathering system system	Dec. 31, 2012 Refined products terminals terminals	Dec. 31, 2012 Crude oil and refined products storage facility facility	Dec. 31, 2012 Short-haul pipelines pipelines	Dec. 31, 2012 Marine terminals terminals	Dec. 31, 2012 Rail car unloading facility facility	Dec. 31, 2012 Martinez Marine Terminal Acquisition	Dec. 31, 2012 Long Beach Assets Acquisition	Dec. 31, 2012 Anacortes Rail Facility Acquisition
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Initial public offering date	Apr. 26, 2011
Segment Reporting Information
Effective date of Acquisition												Apr. 01, 2012	Sep. 14, 2012	Nov. 15, 2012
Common units sold to the public in initial public offering (units)				4,255,000	14,950,000
Number of assets (assets)						1	8	1	5	2	1
Percentage of revenue from Tesoro	91.00%	89.00%	67.00%