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Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Inventory    
Raw materials and supplies - production locations $ 321,261 $ 187,449
Raw materials and supplies - customer locations 13,629 16,294
Work-in-process 86,235 58,341
Finished goods 8,424 7,079
Inventory $ 429,549 $ 269,163