Treasury Stock (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Aug. 31, 2013
Equity, Class of Treasury Stock [Line Items]
Treasury Stock as of February 28, 2013	8,824,172
Repurchases During the Six Months Ended August 31, 2013
Treasury Stock as of August 31, 2013	8,824,172
Treasury Stock as of February 28, 2013	$ 76,756
Repurchases During the Six Months Ended August 31, 2013
Treasury Stock as of August 31, 2013	$ 76,756
Treasury Stock as of February 28, 2013	$ 8.70
Repurchases During the Six Months Ended August 31, 2013
Treasury Stock as of August 31, 2013	$ 8.70