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PROPERTY, PLANT AND EQUIPMENT (Tables)
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment consist of the following (in thousands):
 
December 31,
 
2018
 
2017
Land
$
35,485

 
$
34,493

Buildings and building improvements
141,098

 
139,636

Machinery and equipment
266,803

 
254,544

Construction in progress
31,772

 
17,672

 
475,158

 
446,345

Less: accumulated depreciation
(268,167
)
 
(250,982
)
 
$
206,991

 
$
195,363