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Earnings Per Share
 12 Months Ended
Dec. 31, 2022
Earnings Per Share [Abstract]  
Earnings Per Share
Note 7.  Earnings Per Share (EPS)

  
Year Ended December 31,
  
(in millions, except per share data)
  
2022
    
2021
    
2020
  
Net income attributable to MTI
  
$
122.2
    
$
164.4
    
$
112.4
  
                         
                         
Weighted average shares outstanding
    
32.7
      
33.6
      
34.2
  
Dilutive effect of stock options and deferred restricted stock units
    
0.1
      
0.2
      
—
  
Weighted average shares outstanding, adjusted
    
32.8
      
33.8
      
34.2
  
                         
Basic earnings per share attributable to MTI
  
$
3.74
    
$
4.89
    
$
3.29
  
                         
Diluted earnings per share attributable to MTI
  
$
3.73
    
$
4.86
    
$
3.29
  


Of the options outstanding of 1,363,418, 1,330,002 and 1,363,366 for the years ended December 31, 2022, 2021 and 2020, respectively, options to purchase 754,867 shares, 510,683 shares and 591,322 shares of common stock for the years ended December 31, 2022, 2021 and 2020, respectively, were not included in the computation of diluted earnings per share because they were anti-dilutive, as the exercise prices of the options were greater than the average market price of the common shares.