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Inventories - Summary of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Raw materials $ 81,270 $ 75,687
Work-in-process 26,416 24,304
Finished goods 48,186 42,736
Inventories $ 155,872 $ 142,727