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PROPERTY, PLANT AND EQUIPMENT (Tables)
 6 Months Ended
Jun. 30, 2017
PROPERTY, PLANT AND EQUIPMENT [Abstract]  
Property, plant and equipment
Property, plant and equipment consist of the following:

 
 
June 30,
  
December 31,
 
 
 
2017
  
2016
 
Land
 
$
2,250
  
$
2,234
 
Buildings and improvements
  
30,444
   
30,061
 
Machinery and equipment
  
114,628
   
113,780
 
Construction in progress
  
2,302
   
3,029
 
 
  
149,624
   
149,104
 
Accumulated depreciation
  
(104,677
)
  
(100,349
)
Property, plant and equipment, net
 
$
44,947
  
$
48,755