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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Components of Inventories
Inventories consist of the following:
March 31,December 31,
20212020
Components and raw materials$190,376 $190,775 
Work-in-process38,066 47,251 
Finished goods139,707 126,967 
Total$368,149 $364,993