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Inventories - Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 59,272 $ 64,923
Work in process 35,716 35,028
Finished goods 100,629 100,873
Total inventories $ 195,617 $ 200,824