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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Inventories    
Raw materials $ 1,416,669 $ 1,608,344
Supplies 678,823 629,074
Work in progress 305,691 256,071
Finished goods 642,826 636,475
Total inventories $ 3,044,009 $ 3,129,964