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INVENTORY (Tables)
 3 Months Ended
Mar. 31, 2018
INVENTORY [Abstract]  
Inventories
Inventories consist of the following (U.S. dollars in thousands):

  
March 31,
2018
  
December 31,
2017
 
       
Raw materials 
 
$
98,199
  
$
87,683
 
Finished goods 
  
184,784
   
165,771
 
  
$
282,983
  
$
253,454