Related Party Transactions (Commercial Agreements) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	1 Months Ended
	Dec. 31, 2014 bbl	Oct. 31, 2014 bbl	Dec. 31, 2013
Related Party Transaction [Line Items]
Deferred revenue - Western	6,779		$ 2,589
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]
Long-term Purchase Commitment, Minimum Quantity Required		645,000
Profit Margin, per Gallon		0.03
Deferred revenue - Western	0
Crude Oil Trucking Transportation Services Agreement [Member]
Related Party Transaction [Line Items]
Long-term Purchase Commitment, Minimum Quantity Required		1,525,000