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Note 2 - Earnings Per Common Share (Tables)
9 Months Ended
Sep. 30, 2015
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months
Ended September 30,
   
Nine Months
Ended September 30,
 
(In thousands, except per share amounts)
 
2015
    2014    
2015
    2014  
Numerator:
                               
Net income
  $ 8,410     $ 7,652     $ 26,955     $ 20,865  
Denominator:
                               
Basic earnings per common share - weighted-average shares
    33,622       33,403       33,555       33,371  
Effect of dilutive stock options
    224       289       261       301  
Diluted earnings per common share - weighted-average shares and assumed conversions
    33,846       33,692       33,816       33,672  
                                 
Basic earnings per common share
  $ 0.25     $ 0.23     $ 0.80     $ 0.63  
Diluted earnings per common share
  $ 0.25     $ 0.23     $ 0.80     $ 0.62