Significant Accounting Policies - Revenues and Expenses Associated with Servicing of Agreements (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Segment Reporting Information [Line Items]
Royalty revenue	$ 24,740	$ 31,360	$ 32,016
Royalty expenses:
Material, labor and other production costs	817,740	741,645	682,368
Selling, distribution and marketing expenses	653,935	533,827	483,553
Administrative and general expenses	298,569	250,691	260,476
AG intellectual properties [Member]
Royalty expenses:
Material, labor and other production costs	9,929	13,516	11,806
Selling, distribution and marketing expenses	7,336	11,368	14,046
Administrative and general expenses	1,848	1,748	1,697
Royalty revenue, net	$ 19,113	$ 26,632	$ 27,549