Related Party Transactions (Details) (USD $)	3 Months Ended				1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2014 bbl	Oct. 31, 2014 bbl
Related Party Transaction [Line Items]
Deferred revenue - affiliate	$ 8,011,000			6,779,000
Operating Leases, Rent Expense	2,300,000	2,100,000
Maximum [Member] | Ground Lease and Access Agreements [Member] | Western Refining, Inc. [Member]
Related Party Transaction [Line Items]
Operating Leases, Rent Expense			100,000
Product Supply Agreement [Member]
Related Party Transaction [Line Items]
Long-term Purchase Commitment, Minimum Quantity Required				79,000
Fuel Distribution and Supply Agreement [Member]
Related Party Transaction [Line Items]
Deferred revenue - affiliate				0
Long-term Purchase Commitment, Minimum Quantity Required					645,000
Profit Margin, per Gallon					0.03
Crude Oil Trucking Transportation Services Agreement [Member]
Related Party Transaction [Line Items]
Long-term Purchase Commitment, Minimum Quantity Required					1,525,000