Basis of Presentation and Principles of Consolidation (Details)	3 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2011 customers	Sep. 30, 2011 customers	Sep. 30, 2012 customers	Dec. 31, 2011 customers	Sep. 30, 2012 Couche-Tard [Member]	Sep. 30, 2012 Couche-Tard [Member]
Concentration Risk [Line Items]
Major customer percentage of net sales					13.70%	13.60%
Customers accounting for 10% or more of total net sales, number	0	0
Customers accounted for 10% or more of accounts receivable, number			0	0