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Note H - Income Per Share (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
   
Nine Months Ended
 
   
September 30,
   
September 30,
 
   
2019
   
2018
   
2019
   
2018
 
   
(in thousands, except per share data)
 
                                 
Net income
  $
4,581
    $
9,248
    $
21,536
    $
17,924
 
                                 
Basic weighted average common shares outstanding
   
5,756
     
6,034
     
5,859
     
6,120
 
Dilutive effect of common stock equivalents
   
43
     
54
     
48
     
83
 
Diluted weighted average common shares outstanding
   
5,799
     
6,088
     
5,907
     
6,203
 
                                 
Basic earnings per share
  $
0.80
    $
1.53
    $
3.68
    $
2.93
 
Diluted earnings per share
  $
0.79
    $
1.52
    $
3.65
    $
2.89