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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Reconciliation of the Component Parts of Earnings per Share

A reconciliation of the component parts of earnings per share for 2019, 2018 and 2017 follows:

(dollars in thousands,
except per share data)
  
For the years ended December 31
  
 
  
2019
    
2018
    
2017
  
                   
Net income
  
$
57,840
      
61,445
      
43,145
  
Weighted average common shares
    
96,849
      
96,505
      
96,111
  
                         
Effect of dilutive common stock options
    
78
      
141
      
111
  
 
                        
Weighted average common shares including potential dilutive shares
    
96,927
      
96,646
      
96,222
  
 
                        
Basic EPS
  
$
0.597
      
0.637
      
0.449
  
 
                        
Diluted EPS
  
$
0.597
      
0.636
      
0.448