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Inventories (Components of Inventories) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Raw materials and component parts $ 144,635 $ 133,470
Work in process 40,956 41,895
Finished goods 65,467 55,602
Total $ 251,058 $ 230,967