Basis of Presentation and Principles of Consolidation (Details) (Customer Concentration Risk [Member])			3 Months Ended
	Mar. 31, 2014 customer	Dec. 31, 2013 customer	Mar. 31, 2014 Sales [Member] Couche-Tard [Member]	Mar. 31, 2013 Sales [Member] Couche-Tard [Member]
Concentration Risk [Line Items]
Major customer percentage of net sales			14.60%	13.40%
Customer accounted for 10% or more of accounts receivable, number	0	0