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Stock Award Plans (Tables)
 6 Months Ended
Jun. 30, 2020
Stock Award Plans [Abstract]  
Compensation Cost Breakdown in Statement of Earnings

The compensation cost that has been charged against earnings for the Company’s stock award plans and the income tax benefit recognized in the statement of earnings for stock awards were as follows (in thousands):

  
Three months ended June 30,
    
Six months ended June 30,
  
   
2020
    
2019
    
2020
    
2019
  
Compensation cost
  
$
3,321
    
$
3,007
    
$
8,652
    
$
7,907
  
Income tax benefit
  
$
889
    
$
740
    
$
2,151
    
$
1,909