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INVENTORIES (Tables)
 3 Months Ended
Mar. 31, 2019
INVENTORIES [Abstract]  
Details of Inventories
The following table presents the details of inventories as of March 31, 2019 and December 31, 2018 (in thousands):

  
March 31,
2019
  
December 31,
2018
 
       
Finished goods
 
$
362,502
  
$
406,364
 
Work in process
  
129,064
   
101,077
 
  
$
491,566
  
$
507,441