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Inventories - Components of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Feb. 28, 2015
Feb. 28, 2014
Inventory Disclosure [Abstract]    
Raw material $ 18,153us-gaap_InventoryRawMaterialsNetOfReserves $ 16,400us-gaap_InventoryRawMaterialsNetOfReserves
Work-in-process 7,195us-gaap_InventoryWorkInProcessNetOfReserves 14,386us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 94,466us-gaap_InventoryFinishedGoodsNetOfReserves 99,309us-gaap_InventoryFinishedGoodsNetOfReserves
Inventories $ 119,814us-gaap_InventoryNet $ 130,095us-gaap_InventoryNet