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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment consisted of the following:
 
December 31,
 (in thousands)
2019
 
2018
Land
$
28,092

 
$
30,034

Buildings and site improvements
195,210

 
198,809

Leasehold improvements
4,911

 
4,826

Machinery and equipment
351,379

 
330,076

 
579,592

 
563,745

Less accumulated depreciation and amortization
(346,594
)
 
(318,388
)
 
232,998

 
245,357

Capital projects in progress
16,014

 
9,240

 
$
249,012

 
$
254,597