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INVENTORIES - Summary of Inventories Stated at Lower Cost (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Sep. 30, 2021
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 164,912 $ 133,684
Work in process 48,267 48,531
Finished goods 473,832 290,579
Total $ 687,011 $ 472,794