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Inventories - Components of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
May 31, 2014
Feb. 28, 2014
Inventory Disclosure [Abstract]    
Raw material $ 17,504 $ 16,400
Work-in-process 11,904 14,386
Finished goods 100,190 99,309
Inventories $ 129,598 $ 130,095