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Earnings Per Share
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Earnings Per Share
18. Earnings Per Share

We present two calculations of earnings per common share.  “Basic” earnings per common share equals net earnings attributable to SMP divided by weighted average common shares outstanding during the period. “Diluted” earnings per common share equals net earnings attributable to SMP divided by the sum of weighted average common shares outstanding during the period plus potentially dilutive common shares.  Potentially dilutive common shares that are anti-dilutive are excluded from net earnings per common share.

The following are reconciliations of the net earnings attributable to SMP and the shares used in calculating basic and dilutive net earnings per common share attributable to SMP (in thousands, except per share data):

 
  
Year Ended December 31,
  
 
  
2021
    
2020
    
2019
  
 Net Earnings Attributable to SMP -
                 
Earnings from continuing operations
  
$
99,353
    
$
80,417
    
$
69,051
  
Loss from discontinued operations
    
(8,467
)
    
(23,024
)
    
(11,134
)
Net earnings attributable to SMP
  
$
90,886
    
$
57,393
    
$
57,917
  
 
                        
Basic Net Earnings Per Common Share Attributable to SMP -
                        
Earnings from continuing operations per common share
  
$
4.49
    
$
3.59
    
$
3.09
  
Loss from discontinued operations per common share
    
(0.39
)
    
(1.02
)
    
(0.50
)
Net earnings per common share attributable to SMP
  
$
4.10
    
$
2.57
    
$
2.59
  
 
                        
Weighted average common shares outstanding
     22,147       22,374       22,378  
                         
Diluted Net Earnings Per Common Share Attributable to SMP -
                        
Earnings from continuing operations per common share
  
$
4.39
    
$
3.52
    
$
3.03
  
Loss from discontinued operations per common share
    
(0.37
)
    
(1.01
)
    
(0.49
)
Net earnings per common share attributable to SMP
  
$
4.02
    
$
2.51
    
$
2.54
  
 
                        
Weighted average common shares outstanding
    
22,147
      
22,374
      
22,378
  
Plus incremental shares from assumed conversions:
                        
Dilutive effect of restricted stock and performance-based stock
    
469
      
452
      
440
  
Weighted average common shares outstanding – Diluted
    
22,616
      
22,826
      
22,818
  

The shares listed below were not included in the computation of diluted net earnings per common share attributable to SMP because to do so would have been anti-dilutive for the periods presented or because they were excluded under the treasury method (in thousands):

 
  
2021
    
2020
    
2019
  
Restricted and performance shares
    
269
      
268
      
255