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PROPERTY, PLANT AND EQUIPMENT, NET
 12 Months Ended
Dec. 31, 2025
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:
20252024
 (Dollars in thousands)
Land$105,227 $96,965 
Buildings and improvements691,045 650,587 
Machinery and equipment4,407,018 4,122,498 
Construction in progress308,921 281,086 
5,512,211 5,151,136 
Accumulated depreciation(3,133,880)(2,868,233)
$2,378,331 $2,282,903 
 
Depreciation expense in 2025, 2024 and 2023 was $254.5 million, $223.3 million and $210.1 million, respectively.