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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
Summary of Significant Accounting Policies [Abstract]  
Weighted-Average Common Shares for the Computation of EPS The following table sets forth the computation of basic and diluted EPS for the years ended December 31:

 
  
Years Ended December 31,
  
(in thousands except per share amounts)
  
2019
    
2018
    
2017
  
Numerator:
                  
Net earnings
  
$
82,047
    
$
157,360
    
$
89,600
  
Denominator:
                        
Denominator for basic EPS - weighted average common shares
    
42,263
      
42,404
      
43,780
  
Effect of dilutive securities
    
31
      
95
      
251
  
Denominator for diluted EPS - diluted weighted average shares outstanding
    
42,294
      
42,499
      
44,031
  
 
                        
Earnings per Common Share
                        
Basic
  
$
1.94
    
$
3.71
    
$
2.05
  
Diluted
  
$
1.94
    
$
3.70
    
$
2.03