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Note 12 - Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
June 30,
   
June 30,
 
   
2019
   
2018
   
2019
   
2018
 
(Amounts in thousands, except share and per share data)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income
  $
10,451
    $
9,066
    $
20,082
    $
17,934
 
                                 
Weighted average common shares outstanding, basic
   
15,712,204
     
16,689,398
     
15,775,462
     
16,821,842
 
Dilutive effect of potential common shares
                               
Stock options
   
56,818
     
69,914
     
57,795
     
62,384
 
Restricted stock
   
6,298
     
29,303
     
14,241
     
28,646
 
Total dilutive effect of potential common shares
   
63,116
     
99,217
     
72,036
     
91,030
 
Weighted average common shares outstanding, diluted
   
15,775,320
     
16,788,615
     
15,847,498
     
16,912,872
 
                                 
Basic earnings per common share
  $
0.67
    $
0.54
    $
1.27
    $
1.06
 
Diluted earnings per common share
   
0.66
     
0.54
     
1.27
     
1.06
 
                                 
Antidilutive potential common shares
                               
Restricted stock
   
-
     
1,793
     
-
     
867
 
Total potential antidilutive shares
   
-
     
1,793
     
-
     
867