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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Summary of Property, Plant and Equipment
Property, plant and equipment consist of the following (in thousands):
 
December 31,
 
 
2019
 
 
2018
 
Land and land improvements
  $
37,040
    $
36,554
 
Buildings and leasehold improvements
   
355,425
     
299,103
 
Production and other equipment
   
537,211
     
494,302
 
Construction in progress
   
57,985
     
41,909
 
                 
Total property, plant and equipment
   
987,661
     
871,868
 
Less: accumulated depreciation and amortization
   
(570,319
)    
(528,785
)
                 
Property, plant and equipment, net
  $
417,342
    $
343,083