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Inventories - Components of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 13,101 $ 12,667
Work-in-process 4,472 4,193
Finished goods 8,121 9,322
Inventories $ 25,694 $ 26,182