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Inventories (Schedule Of Inventories) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 111,519 $ 122,218
Work in process 168,396 176,141
Finished goods 95,718 84,544
Inventories, net $ 375,633 $ 382,903