Income Taxes - Company's Total Gross Unrecognized Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 20,814	$ 19,011	$ 21,659
Additions for tax positions of prior years	2,413	3,527	538
Reductions for tax positions of prior years	(3,777)	(1,440)	(2,459)
Settlements		(14)
Statute lapse	(2,338)	(270)	(727)
Balance at end of year	$ 17,112	$ 20,814	$ 19,011