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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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Net Sales:          
Total net sales $ 209,111 $ 186,903 $ 413,422 $ 349,519  
Long-term Assets:          
Total long-term assets 234,811   234,811   $ 153,636
Continuing Operations [Member]          
Net Sales:          
Total net sales 209,111 186,903 413,422 349,519  
Long-term Assets:          
Total long-term assets 234,811   234,811   153,636
Continuing Operations [Member] | North America [Member]          
Net Sales:          
Total net sales 121,487 114,250 244,873 213,369  
Long-term Assets:          
Total long-term assets 74,594   74,594   73,835
Continuing Operations [Member] | South America [Member]          
Net Sales:          
Total net sales 23,500 20,253 45,133 37,865  
Long-term Assets:          
Total long-term assets 61,015   61,015   63,497
Continuing Operations [Member] | Europe and Other [Member]          
Net Sales:          
Total net sales 64,124 $ 52,400 123,416 $ 98,285  
Long-term Assets:          
Total long-term assets $ 99,202   $ 99,202   $ 16,304