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Note H - Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
   
Nine Months Ended
 
   
September 30,
   
September 30,
 
   
2018
   
2017
   
2018
   
2017
 
   
(in thousands, except per share data)
 
                                 
Net income
  $
9,248
    $
3,446
    $
17,924
    $
7,338
 
                                 
Basic weighted average common shares outstanding
   
6,034
     
6,326
     
6,120
     
6,368
 
Dilutive effect of common stock equivalents
   
54
     
47
     
83
     
45
 
Diluted weighted average common shares outstanding
   
6,088
     
6,373
     
6,203
     
6,413
 
                                 
Basic earnings per share
  $
1.53
    $
0.54
    $
2.93
    $
1.15
 
Diluted earnings per share
  $
1.52
    $
0.54
    $
2.89
    $
1.14