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	9 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 774	$ 1,146
Income taxes paid	$ 12,535	$ 10,240