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Capital Stock (Tables)
12 Months Ended
Dec. 31, 2018
Capital Stock [Abstract]  
Weighted Average Common Shares Outstanding
The following is a reconciliation of the weighted-average common shares outstanding for purposes of computing basic and diluted net income per share (in thousands):

  
Year Ended December 31,
 
  
2018
  
2017
  
2016
 
          
Basic weighted-average common shares outstanding
  
55,170
   
52,806
   
55,412
 
Effect of dilutive securities:
            
Stock awards and options
  
1,061
   
1,110
   
683
 
Convertible note
  
245
   
936
   
2
 
Diluted weighted-average common shares outstanding
  
56,476
   
54,852
   
56,097