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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
INVENTORIES [Abstract]    
Raw Materials and Supplies $ 98,244 $ 94,450
Work in Process 38,061 36,899
Finished Goods 74,109 67,590
Inventory, Net $ 210,414 $ 198,939