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Property, Plant, and Equipment
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment
PROPERTY, PLANT, AND EQUIPMENT
Components of property, plant, and equipment at December 31 consisted of the following (in thousands):
 
2018
 
2017
Land and land improvements
$
6,061

 
$
6,301

Building and improvements
46,678

 
46,562

Machinery and equipment
204,326

 
195,301

Construction in progress
7,690

 
8,522

Property, plant, and equipment, gross
264,755

 
256,686

Less: accumulated depreciation
(168,925
)
 
(159,588
)
Property, plant, and equipment, net
$
95,830

 
$
97,098