Summary of Significant Accounting Policies Calculation of Basic and Diluted Net Income Per Share from Continuing Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2015	Nov. 30, 2014
Basic net income per common share:
Net income available to common shareholders	$ 5,548	$ 2,823	$ 11,467	$ 6,539
Impact of conversion of preferred stock into common stock	$ 0		$ 0
Basic shares:
Basic weighted average common shares outstanding (in shares)	44,400	42,702	43,844	42,451
Impact of equity awards (in shares)	990	2,408	1,408	2,738
Impact of conversion of preferred stock into common stock (in shares)	2,114	2,266	2,199	2,266
Diluted shares:
Diluted weighted average common shares outstanding (in shares)	47,504	47,376	47,451	47,455
Basic net income per common share:
Net income available to common shareholders from continuing operations, per basic shares (in dollars per share)	$ 0.12	$ 0.07	$ 0.26	$ 0.15
Diluted net income per common share:
Net income available to common shareholders from continuing operations, per dilutive shares (in dollars per share)	$ 0.12	$ 0.06	$ 0.24	$ 0.14