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Note 3 - Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2015
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

For the three months ended

June 30,

 

For the six months ended

June 30,

    2015   2014   2015   2014
    (In thousands, except per share data)
Net income, as reported   $ 14,834     $ 11,685     $ 23,567     $ 21,981  
Divided by:                                
Weighted average common shares outstanding     29,246       30,059       29,321       30,022  
Weighted average common stock equivalents     22       31       22       34  
Total weighted average common shares outstanding and common stock equivalents     29,268       30,090       29,343       30,056  
                                 
Basic earnings per common share   $ 0.51     $ 0.39     $ 0.80     $ 0.73  
Diluted earnings per common share (1)   $ 0.51     $ 0.39     $ 0.80     $ 0.73  
Dividend payout ratio     31.4 %     38.5 %     40.0 %     41.1 %