Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES - Summary of Inventories (Details)

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INVENTORIES - Summary of Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 109,713 $ 66,487
Work in process 1,130 562
Finished goods 80,994 44,650
Total inventories $ 191,837 $ 111,699