Calculation of Basic and Diluted Net Income Per Share from Continuing Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	May 31, 2013	May 31, 2012
Basic net (loss) income per common share:
Net (loss) income available to common shareholders from continuing operations	$ 3,725	$ (5,031)
Impact of equity awards
Impact of conversion of preferred stock into common stock	(249)
Diluted net (loss) income per common share:
Net income available to common shareholders from continuing operations	$ 3,476	$ (2,672)
Basic shares:
Basic weighted average common shares outstanding	41,174	38,779
Impact of equity awards	2,043
Impact of conversion of preferred stock into common stock	2,287
Diluted shares:
Diluted weighted average common shares outstanding	45,504	38,779
Basic net income per common share:
Net income available to common shareholders from continuing operations, per basic shares	$ 0.09	$ (0.07)
Impact of equity awards
Impact of conversion of preferred stock into common stock
Diluted net income per common share:
Net income available to common shareholders from continuing operations, per dilutive shares	$ 0.08	$ (0.07)