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Inventories (Tables)
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventory
As of September 30, 2021 and December 31, 2020, Inventories consisted of the following:
(in thousands)
September 30, 2021December 31, 2020
Raw materials$57,534 $57,789 
Work in process
44,715 40,416 
Finished goods15,880 12,273 
Total inventories
$118,129 $110,478