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INVENTORIES - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 71,528 $ 99,495
Work-in-process 103,316 98,753
Finished goods 122,458 154,012
Total 297,302 352,260
Long-term inventory 8,500 13,200
Inventories not yet available for sale $ 17,700 $ 37,500