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Inventories (Schedule Of Inventory Costs) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Inventories [Abstract]    
Raw materials $ 269,847 $ 233,111
Work in process 115,054 113,496
Finished goods 36,957 34,727
Inventories $ 421,858 $ 381,334