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Segment Data (Details)
12 Months Ended
Dec. 31, 2012
item
Segment Data  
Number of distinct segments 2
Revenues | Sales risk | Component Products
 
Concentration of risk  
Percentage of concentration risk 5.70%
Revenues | Sales risk | Packaging
 
Concentration of risk  
Percentage of concentration risk 8.80%
Total Sales | Sales risk | Component Products
 
Concentration of risk  
Percentage of concentration risk 3.80%
Total Sales | Sales risk | Packaging
 
Concentration of risk  
Percentage of concentration risk 2.90%