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Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Feb. 29, 2012
Consolidated Statements of Stockholders' Equity      
Stock option share-based compensation, tax benefits $ 47 $ 74 $ 99
Exercise of stock options, tax benefits 499 5,015 4,483
Restricted share-based compensation tax benefit $ 2,921