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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