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Segment Reporting (Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Net Sales:      
Total net sales $ 162,616 $ 162,825  
Long-term Assets:      
Total long-term assets 138,419   $ 132,343
Continuing Operations [Member]      
Net Sales:      
Total net sales 162,616 162,825  
Long-term Assets:      
Total long-term assets 138,419   132,343
Continuing Operations [Member] | North America [Member]      
Net Sales:      
Total net sales 99,119 89,753  
Long-term Assets:      
Total long-term assets 60,547   60,099
Continuing Operations [Member] | South America [Member]      
Net Sales:      
Total net sales 17,612 26,523  
Long-term Assets:      
Total long-term assets 60,799   56,943
Continuing Operations [Member] | Europe and Other [Member]      
Net Sales:      
Total net sales 45,885 $ 46,549  
Long-term Assets:      
Total long-term assets $ 17,073   $ 15,301