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Inventories (Components Of Inventories) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Components and raw materials $ 247,603 $ 233,594
Work-in-process 55,698 66,498
Finished components and devices 114,516 103,487
Total $ 417,817 $ 403,579