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Property, plant and equipment
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Property, plant and equipment Property, plant and equipment
Details of the Company’s property, plant and equipment at December 31 are as follows:
20232022
Land$135,518 $131,362 
Timber resources— 42,202 
Buildings740,138 664,012 
Machinery and equipment3,825,134 3,528,545 
Construction in progress269,061 226,701 
4,969,851 4,592,822 
Accumulated depreciation and depletion(3,063,714)(2,882,423)
Property, plant and equipment, net$1,906,137 $1,710,399 

Depreciation and depletion expense amounted to $240,614 in 2023, $216,138 in 2022 and $189,667 in 2021.