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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, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Net Sales: |  |  |  |  |
Total net sales | $ 186,903 | $ 165,289 | $ 349,519 | $ 328,114 |
Long-term Assets: |  |  |  |  |
Total long-term assets | 143,417 |  | 143,417 |  | $ 132,343
Continuing Operations [Member] |  |  |  |  |
Net Sales: |  |  |  |  |
Total net sales | 186,903 | 165,289 | 349,519 | 328,114 |
Long-term Assets: |  |  |  |  |
Total long-term assets | 143,417 |  | 143,417 |  | 132,343
Continuing Operations [Member] | North America [Member] |  |  |  |  |
Net Sales: |  |  |  |  |
Total net sales | 114,250 | 94,679 | 213,369 | 184,432 |
Long-term Assets: |  |  |  |  |
Total long-term assets | 61,161 |  | 61,161 |  | 60,099
Continuing Operations [Member] | South America [Member] |  |  |  |  |
Net Sales: |  |  |  |  |
Total net sales | 20,253 | 22,996 | 37,865 | 49,518 |
Long-term Assets: |  |  |  |  |
Total long-term assets | 66,061 |  | 66,061 |  | 56,943
Continuing Operations [Member] | Europe and Other [Member] |  |  |  |  |
Net Sales: |  |  |  |  |
Total net sales | 52,400 | $ 47,614 | 98,285 | $ 94,164 |
Long-term Assets: |  |  |  |  |
Total long-term assets | $ 16,195 |  | $ 16,195 |  | $ 15,301

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