Commitments and Contingencies (Details) (USD $)	0 Months Ended					0 Months Ended					0 Months Ended
	Jun. 19, 2013	Apr. 26, 2011	Jun. 30, 2013	Jun. 30, 2013 Chevron fuel spill remediation liability, current	Jun. 30, 2013 Chevron other environmental liability, non-current	Apr. 02, 2012 Martinez Marine Terminal Acquisition	Sep. 14, 2012 Long Beach Assets Acquisition	Nov. 15, 2012 Anacortes Rail Facility	Jun. 19, 2013 Northwest Products System	Jun. 30, 2013 Northwest Products System	Jun. 01, 2013 Carson Terminal Assets
Acquisition
Right-of-way agreement term (years)	20-year period
Right-of-way agreement, total amount	$ 8,500,000
Right-of-way prepayment received from Chevron acquisition	4,500,000
Remaining Chevron right-of-way obligation	4,000,000
Annual right-of-way installment due 2013	1,000,000
Annual right-of-way installment due 2014	1,000,000
Annual right-of-way installment due 2015	1,000,000
Annual right-of-way installment due 2016	1,000,000
Years to identify conditions for indemnification (years)		5 years				5 years	5 years	5 years	5 years		5 years
Aggregate annual deductible			600,000.0
Chevron environmental remediation indemnification period (years)									2 years
Total Chevron environmental liability accrual										16,600,000
Chevron fuel spill liability, current				11,900,000
Chevron environmental liabilities assumed in acquisition unrelated to Diesel Pipeline Release					$ 3,900,000