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PROPERTY, PLANT AND EQUIPMENT, NET
 12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, net at December 31 was as follows:
20242023
 (Dollars in thousands)
Land$96,965 $82,760 
Buildings and improvements650,587 611,691 
Machinery and equipment4,122,498 3,788,029 
Construction in progress281,086 255,609 
5,151,136 4,738,089 
Accumulated depreciation(2,868,233)(2,776,504)
$2,282,903 $1,961,585 
 
Depreciation expense in 2024, 2023 and 2022 was $223.3 million, $210.1 million and $210.2 million, respectively.