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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 material $ 75,687 $ 76,610
Work-in-process 24,304 19,708
Finished goods 42,736 38,321
Inventories $ 142,727 $ 134,639