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Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Components of Inventories
Inventories consist of the following:
September 30,December 31,
20202019
Components and raw materials$193,765 $200,390 
Work-in-process46,714 49,620 
Finished components and devices129,865 130,780 
Total$370,344 $380,790