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Earnings Per Share (Tables)
3 Months Ended
Jun. 30, 2012
Earnings Per Share Basic And Diluted [Abstract]  
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share Table [Text Block]
       
   Quarter Ended
   Fiscal June
   2012  2011
  (Dollars in thousands,
  except per share data)
Numerator for earnings per common share calculation:     
Net Income$ 11,637 $ 15,442
Preferred stock dividends  (76)   (61)
Income available to common stockholders$ 11,561 $ 15,381
       
Denominator for earnings per common share calculation:     
Weighted average common shares, basic  30,922   30,497
Effect of dilutive securities:      
 Preferred stock  760   760
 Stock options  482   729
Weighted average number of common shares, diluted  32,164   31,986
Basic Earnings per common share:$ 0.37 $ 0.50
Diluted Earnings per common share:$ 0.36 $ 0.48