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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventory [Line Items]    
Inventory, Raw Materials, Gross $ 93,014 $ 85,726
Inventory, Work in Process, Gross 42,996 40,945
Inventory, Finished Goods, Gross 76,994 69,830
Inventories, net 213,004 196,501
Inventory Valuation Reserves $ 6,556 $ 4,078