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Inventories - Summary of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Raw materials $ 76,520 $ 75,687
Work-in-process 23,140 24,304
Finished goods 47,851 42,736
Inventories $ 147,511 $ 142,727