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Inventories (Components Of Inventories) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Components and raw materials $ 193,765 $ 200,390
Work-in-process 46,714 49,620
Finished components and devices 129,865 130,780
Total $ 370,344 $ 380,790