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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 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Segment Reporting Information [Line Items]          
Net sales $ 203,386 $ 208,853 $ 643,924 $ 655,385  
Long-term Assets:          
Total long-term assets 262,762   262,762   $ 239,342
North America [Member]          
Segment Reporting Information [Line Items]          
Net sales 115,816 119,475 358,476 364,789  
Long-term Assets:          
Total long-term assets 92,575   92,575   86,763
South America [Member]          
Segment Reporting Information [Line Items]          
Net sales 16,542 18,864 50,488 59,742  
Long-term Assets:          
Total long-term assets 48,174   48,174   45,408
Europe and Other [Member]          
Segment Reporting Information [Line Items]          
Net sales 71,028 $ 70,514 234,960 $ 230,854  
Long-term Assets:          
Total long-term assets $ 122,013   $ 122,013   $ 107,171