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PROPERTY, PLANT AND EQUIPMENT, NET (Tables)
 12 Months Ended
Dec. 31, 2017
PROPERTY, PLANT AND EQUIPMENT, NET [Abstract]  
Property, plant and equipment
Property, plant and equipment, net consist of the following:
 
  
December 31,
 
  
2017
  
2016
 
Land
 
$
2,259
  
$
2,234
 
Buildings and improvements
  
30,761
   
30,061
 
Machinery and equipment
  
122,773
   
113,780
 
Construction in progress
  
1,511
   
3,029
 
   
157,304
   
149,104
 
Accumulated depreciation
  
(113,809
)
  
(100,349
)
Property, plant and equipment, net
 
$
43,495
  
$
48,755