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Inventories - Summary of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 19,744 $ 21,790
Work-in-process 3,979 2,630
Finished goods 5,973 5,535
Net balance $ 29,696 $ 29,955