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Note 13 Computation of Earnings Per Share (Tables)
3 Months Ended
Jun. 30, 2012
Earnings Per Share Reconciliation [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   Three Months Ended
    June 30,
   2012 2011
        
   (unaudited)
 Net income $ 6,007 $ 9,976
 Weighted average shares - basic   31,351   31,508
 Weighted average shares - diluted   32,378   32,806
 Net income per share - basic $ 0.19 $ 0.32
 Net income per share - diluted $ 0.19 $ 0.30