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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
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 from continuing operations for the years ended December 31:

  
Years Ended December 31,
 
(in thousands except per share amounts)
 
2018
  
2017
  
2016
 
Numerator:
         
Net earnings from continuing operations
 
$
157,360
  
$
89,600
  
$
122,913
 
Denominator:
            
Denominator for basic EPS - weighted average common shares
  
42,404
   
43,780
   
44,523
 
Effect of dilutive securities
  
95
   
251
   
320
 
Denominator for diluted EPS - diluted weighted average shares outstanding
  
42,499
   
44,031
   
44,843
 
             
EPS from continuing operations
            
Basic
 
$
3.71
  
$
2.05
  
$
2.76
 
Diluted
 
$
3.70
  
$
2.03
  
$
2.74