Organization and Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2016

Product Margin [Member]

Schedule of product sales, other revenues and product margin as a percentage of the consolidated total

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Wholesale segment	21	%	37	%	23	%	40	%
GDSO segment	75	%	59	%	73	%	55	%
Commercial segment	4	%	4	%	4	%	5	%
Total	100	%	100	%	100	%	100	%

Sales Revenue, Product Line [Member]

Schedule of product sales, other revenues and product margin as a percentage of the consolidated total

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Gasoline sales: gasoline and gasoline blendstocks (such as ethanol)	68	%	62	%	63	%	56	%
Crude oil sales and crude oil logistics revenue	7	%	13	%	8	%	11	%
Distillates (home heating oil, diesel and kerosene), residual oil, natural gas and propane sales	20	%	21	%	25	%	30	%
Convenience store sales, rental income and sundry sales	5	%	4	%	4	%	3	%
Total	100	%	100	%	100	%	100	%