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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventory Items, Net Of Reserves Alternative [Abstract]    
Raw materials $ 76,930 $ 73,280
Work in progress 19,656 16,133
Finished goods 146,214 140,152
Total inventories $ 242,800 $ 229,565