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Inventories (Tables)
 9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory
As of September 30, 2020 and December 31, 2019, Inventories consisted of the following:
(in thousands)
September 30, 2020December 31, 2019
Raw materials
$65,117 $52,960 
Work in process
35,207 31,744 
Finished goods
12,783 10,445 
Total inventories
$113,107 $95,149