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INVENTORY (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Inventory Disclosure [Abstract]      
Materials and supplies $ 14,488   $ 8,899
Work in process 38,874   28,235
Finished goods 24,871   28,454
Total 78,233   65,588
Compensation costs capitalized during the period 13,134 $ 6,363  
Capitalized compensation costs included in inventory $ 12,723   $ 8,571