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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Finished goods $ 169,200 $ 173,140
Work in process 31,460 31,880
Raw materials 69,240 65,670
Total inventories $ 269,900 $ 270,690