Summary of Significant Accounting Policies Shares Excluded from Calculation as Effect of Conversion into Shares of Common Stock (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive common share equivalents (in shares)	2,162	1,996	1,627	2,035
Stock options and restricted stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive common share equivalents (in shares)	2,162	1,996	1,627	2,035