Income Taxes - Company's Total Gross Unrecognized Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 21,659	$ 30,360	$ 43,323
Additions based on tax positions related to current year			270
Additions for tax positions of prior years	538	2,106	5,404
Reductions for tax positions of prior years	(2,459)	(184)	(8,959)
Settlements		(9,122)	(9,444)
Statute lapse	(727)	(1,501)	(234)
Balance at end of year	$ 19,011	$ 21,659	$ 30,360