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Market Concentrations (Schedule of Revenues Concentration from Major Customers and Narrative) (Details) (Customer Concentration Risk)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Sales Revenue, Goods, Gross | Customer 1
     
Concentration Risk [Line Items]      
Concentration risk, percentage 19.00% 35.00% 36.00%
Sales Revenue, Goods, Gross | Customer 2
     
Concentration Risk [Line Items]      
Concentration risk, percentage 23.00% 30.00% 28.00%
Sales Revenue, Goods, Gross | Customer 3
     
Concentration Risk [Line Items]      
Concentration risk, percentage 23.00% 28.00% 31.00%
Sales Revenue, Goods, Gross | Customer 4
     
Concentration Risk [Line Items]      
Concentration risk, percentage 24.00% 1.00% 0.00%
Accounts Receivable
     
Concentration Risk [Line Items]      
Concentration risk, percentage 85.30% 81.00%  
Concentration risk, number of major customers exceeding 10 percent threshhold 4 4