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Earnings per Share (Details)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Aug. 31, 2013
Aug. 31, 2012
Weighted average diluted securities        
Weighted average shares outstanding, basic 31,993 31,743 31,951 31,721
Incremental shares from share-based payment arrangements 279 103 275 122
Weighted average shares outstanding, diluted 32,272 31,846 32,226 31,843
Dilutive securities, as a result of in-the-money options (in shares) 347 380 273 376
Dilutive securities, as a result of unvested restricted shares 251   242  
Antidilutive securities, as a result of out-of-the-money options (in shares) 603 617 700 621