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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment, net, at December 31 consisted of:
 
20202019
Land$19,182 $17,644 
Buildings194,936 178,657 
Machinery and equipment696,260 644,339 
910,378 840,640 
Less accumulated depreciation(539,431)(484,037)
$370,947 $356,603