NET SALES (Timing of revenue recognition) (Details 2) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Disaggregation of Revenue [Line Items] | ||
| Net sales | $ 77,536 | $ 71,040 |
| Products transferred at a point in time | ||
| Disaggregation of Revenue [Line Items] | ||
| Net sales | 77,536 | 71,040 |
| Products transferred over time | ||
| Disaggregation of Revenue [Line Items] | ||
| Net sales | $ 0 | $ 0 |