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Inventories (Schedule Of Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventory, Net [Abstract]    
Finished goods $ 14,953 $ 16,138
Work-in-process 7,750 7,451
Raw materials 24,477 28,758
Stores, supplies and other 23,483 22,323
Total $ 70,663 $ 74,670