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Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2018
Property, Plant and Equipment [Abstract]  
Components of Property, Plant and Equipment
The following table sets forth the components of property, plant and equipment:
(In thousands)
March 31, 2018
 
December 31, 2017
Land
$
3,367

 
$
3,312

Buildings
120,901

 
119,970

Machinery and equipment
386,043

 
379,747

Construction in progress
11,807

 
12,036

Total
522,118

 
515,065

Less: accumulated depreciation
(367,270
)
 
(358,051
)
Net property, plant and equipment
$
154,848

 
$
157,014