Supplemental Cash Flow Information - Net Cash Flows from Operating Activities Reflect Cash Payments for Interest and Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 976	$ 465
Income taxes paid	$ 9,969	$ 7,229