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Earnings Per Share
 3 Months Ended
Mar. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Share
(11)
Earnings Per Share


The following table presents the components of basic and diluted earnings (loss) per share (in thousands, except per share amounts):

  
Three months ended March 31,
  
   
2020
(Restated)
    
2019
  
Net earnings (loss) attributable to Kirby
  
$
(347,241
)
  
$
44,296
  
Undistributed earnings allocated to restricted shares
    
—
      
(119
)
Income (loss) available to Kirby common stockholders – basic
    
(347,241
)
    
44,177
  
Undistributed earnings allocated to restricted shares
    
—
      
119
  
Undistributed earnings reallocated to restricted shares
    
—
      
(119
)
Income (loss) available to Kirby common stockholders – diluted
  
$
(347,241
)
  
$
44,177
  
                 
Shares outstanding:
                
Weighted average common stock issued and outstanding
    
59,983
      
59,869
  
Weighted average unvested restricted stock
    
(100
)
    
(160
)
Weighted average common stock outstanding – basic
    
59,883
      
59,709
  
Dilutive effect of stock options and restricted stock units
    
—
      
114
  
Weighted average common stock outstanding – diluted
    
59,883
      
59,823
  
                 
Net earnings (loss) per share attributable to Kirby common stockholders:
                
Basic
  
$
(5.80
)
  
$
0.74
  
Diluted
  
$
(5.80
)
  
$
0.74
  


Certain outstanding options to purchase approximately 681,000 and 479,000 shares of common stock were excluded in the computation of diluted earnings per share as of March 31, 2020 and 2019, respectively, as such stock options would have been antidilutive.  Certain outstanding RSUs to convert to 344,000 and 1,000 shares of common stock were also excluded in the computation of diluted earnings per share as of March 31, 2020 and 2019, respectively, as such RSUs would have been antidilutive.