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Inventories - Components of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Nov. 30, 2013
Feb. 28, 2013
Inventory Disclosure [Abstract]    
Raw material $ 18,417 $ 14,470
Work-in-process 12,864 11,238
Finished goods 90,512 83,990
Inventories $ 121,793 $ 109,698