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Note 2 - Earnings Per Common Share
 3 Months Ended
Mar. 31, 2015
Notes to Financial Statements  
Earnings Per Share [Text Block]
(2) Earnings per Common Share
 
Basic and diluted earnings per common share were computed as follows: 
 
   
Three Months
  
    Ended March 31,  
(In thousands, except per share amounts)
  
2015
    
2014
  
Numerator:
                
Net income
   $ 10,188     $ 5,287  
Denominator:
                
Basic earnings per common share - weighted-average shares
     33,458       33,340  
Effect of dilutive stock options
     303       291  
Diluted earnings per common share - weighted-average shares and assumed conversions
     33,761       33,631  
                 
Basic earnings per common share
   $ 0.30     $ 0.16  
Diluted earnings per common share
   $ 0.30     $ 0.16  
 
              Options totaling 160,800 and 108,500 equivalent shares for the three-month periods ended March 31, 2015 and March 31, 2014, respectively, were outstanding but were not included in the calculation of diluted earnings per share because including the options in the denominator would be antidilutive, or decrease the number of weighted-average shares, due to their exercise prices exceeding the average market price of the common shares, or because inclusion of average unrecognized compensation expense in the calculation would cause the options to be antidilutive.
 
Unvested performance unit awards totaling 48,861 and 35,964 equivalent shares for the three-month periods ended March 31, 2015 and March 31, 2014, respectively, were considered outstanding but were not included in the calculation of diluted earnings per share because inclusion of average unrecognized compensation expense in the calculation would cause the performance units to be antidilutive.