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Earnings per Share (Details)
In Thousands, unless otherwise specified
3 Months Ended
May 31, 2012
May 31, 2011
Weighted average diluted securities    
Weighted average shares outstanding, basic 31,699 30,857
Incremental shares of common stock attributable to share-based payment arrangements 141 803
Weighted average shares outstanding, diluted 31,840 31,660
Dilutive securities, as a result of in-the-money options (in shares) 423 2,338
Antidilutive securities, as a result of out-of-the-money options (in shares) 625 407