Organization and Basis of Presentation (Details 2) (Sales)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Product
Concentration of Risk
Percentage of total sales	100.00%	100.00%
Product | Gasoline sales: gasoline and gasoline blendstocks such as ethanol and naphtha
Concentration of Risk
Percentage of total sales	50.00%	54.00%
Product | Crude oil sales and logistics revenue
Concentration of Risk
Percentage of total sales	9.00%	12.00%
Product | Distillates (home heating oil, diesel and kerosene), residual oil, natural gas and propane sales
Concentration of Risk
Percentage of total sales	38.00%	33.00%
Product | Convenience store sales, rental income and sundry sales
Concentration of Risk
Percentage of total sales	3.00%	1.00%
Customer
Concentration of Risk
Number of significant customers	0	1
Customer | ExxonMobil
Concentration of Risk
Percentage of total sales		14.00%