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PROPERTY, PLANT AND EQUIPMENT, NET (Tables)
12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net
Property, plant and equipment, net at December 31 was as follows:
20212020
 (Dollars in thousands)
Land$84,287 $89,304 
Buildings and improvements610,528 559,773 
Machinery and equipment3,577,712 3,337,536 
Construction in progress196,757 199,635 
4,469,284 4,186,248 
Accumulated depreciation(2,475,407)(2,345,490)
$1,993,877 $1,840,758