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Inventories (Tables)
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Components of Inventories
The components of inventories as of September 30, 2021 and December 31, 2020 were:
September 30,
2021
December 31,
2020
Raw materials and component parts$212,427 $173,248 
Work in process41,586 29,436 
Finished goods99,911 87,226 
Total inventories$353,924 $289,910