Basis of Presentation and Principles of Consolidation (Details)	3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended
	Jun. 30, 2011 customers	Jun. 30, 2011 customers	Jun. 30, 2012 customers	Dec. 31, 2011 customers	Jun. 30, 2012 Couche-Tard [Member]	Jun. 30, 2012 Couche-Tard [Member]
Concentration Risk [Line Items]
Major customer percentage of net sales					12.90%	13.20%
Entity-wide revenue, major customer, number	0	0
Customers accounting for 10% or more of accounts receivable, number			0	0