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Segment Reporting (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Net Sales:      
Total net sales $ 947,830 $ 938,513 $ 765,373
Non-Current Assets:      
Total long-term assets 248,086 281,637  
North America [Member]
      
Net Sales:      
Total net sales 594,854 611,756 601,490
Non-Current Assets:      
Total long-term assets 79,219 82,777  
South America [Member]
      
Net Sales:      
Total net sales 178,532 180,410  
Non-Current Assets:      
Total long-term assets 154,226 185,109  
Europe and Other [Member]
      
Net Sales:      
Total net sales 174,444 146,347 163,883
Non-Current Assets:      
Total long-term assets $ 14,641 $ 13,751