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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
May 31, 2018
May 31, 2017
Numerator:    
Net income for basic and diluted earnings per common share $ 15,718 $ 12,062
Denominator:    
Denominator for basic earnings per common share-weighted average shares (shares) 25,984 26,012
Effect of dilutive securities:    
Employee and Director stock awards (shares) 50 81
Denominator for diluted earnings per common share (shares) 26,034 26,093
Earnings per share basic and diluted:    
Basic earnings per Common share (usd per share) $ 0.60 $ 0.46
Diluted earnings per common share (usd per share) $ 0.60 $ 0.46