Significant Accounting Policies - Revenues and Expenses Associated with Servicing of Agreements (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Segment Reporting Information [Line Items]
Royalty revenue	$ 26,170	$ 24,740	$ 31,360
Royalty expenses:
Material, labor and other production costs	857,227	817,740	741,645
Selling, distribution and marketing expenses	685,088	653,935	533,827
Administrative and general expenses	297,443	298,569	250,691
AG Intellectual Properties [Member]
Royalty expenses:
Material, labor and other production costs	8,583	9,929	13,516
Selling, distribution and marketing expenses	6,339	7,336	11,368
Administrative and general expenses	1,945	1,848	1,748
Royalty expense, total	$ 16,867	$ 19,113	$ 26,632