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Note 3 - Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2015
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,

    2015   2014   2015   2014
    (In thousands, except per share data)
Net income, as reported   $ 11,008     $ 11,201     $ 34,575     $ 33,182  
Divided by:                                
Weighted average common shares outstanding     28,927       29,772       29,188       29,937  
Weighted average common stock equivalents     19       24       21       31  
Total weighted average common shares outstanding and common stock equivalents   $ 28,946     $ 29,796     $ 29,209     $ 29,968  
                                 
Basic earnings per common share   $ 0.38     $ 0.38     $ 1.18     $ 1.11  
Diluted earnings per common share (1)   $ 0.38     $ 0.38     $ 1.18     $ 1.11  
Dividend payout ratio     42.1 %     39.5 %     40.7 %     40.5 %