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Note 3 - Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the three months ended
 September 30,
   
For the nine months ended
 September 30,
 
   
2013
   
2012
   
2013
   
2012
 
   
(In thousands, except per share data)
 
Net income, as reported
  $ 9,421     $ 9,365     $ 25,804     $ 25,131  
Divided by:
                               
Weighted average common shares outstanding
    29,773       30,432       30,143       30,434  
Weighted average common stock equivalents
    32       30       25       30  
Total weighted average common shares outstanding and common stock equivalents
    29,805       30,462       30,168       30,464  
                                 
Basic earnings per common share
  $ 0.32     $ 0.31     $ 0.86     $ 0.83  
Diluted earnings per common share (1)
  $ 0.32     $ 0.31     $ 0.86     $ 0.82  
Dividend payout ratio
    40.6 %     41.9 %     45.3 %     47.0 %