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EARNINGS PER SHARE
 9 Months Ended
Sep. 30, 2019
EARNINGS PER SHARE [Abstract]  
EARNINGS PER SHARE
(12) EARNINGS PER SHARE


The following table presents the components of basic and diluted earnings per share for the three months and nine months ended September 30, 2019 and 2018 (in thousands, except per share amounts):


  
Three months ended September 30,
    
Nine months ended September 30,
  
   
2019
    
2018
    
2019
    
2018
  
Net earnings attributable to Kirby
  
$
47,987
    
$
41,816
    
$
139,570
    
$
102,889
  
Undistributed earnings allocated to restricted shares
    
(128
)
    
(166
)
    
(369
)
    
(438
)
Income available to Kirby common stockholders – basic
    
47,859
      
41,650
      
139,201
      
102,451
  
Undistributed earnings allocated to restricted shares
    
128
      
166
      
369
      
438
  
Undistributed earnings reallocated to restricted shares
    
(128
)
    
(165
)
    
(368
)
    
(437
)
Income available to Kirby common stockholders – diluted
  
$
47,859
    
$
41,651
    
$
139,202
    
$
102,452
  
                                 
Shares outstanding:
                                
Weighted average common stock issued and outstanding
    
59,908
      
59,875
      
59,891
      
59,782
  
Weighted average unvested restricted stock
    
(159
)
    
(237
)
    
(158
)
    
(255
)
Weighted average common stock outstanding – basic
    
59,749
      
59,638
      
59,733
      
59,527
  
Dilutive effect of stock options and restricted stock units
    
157
      
146
      
146
      
141
  
Weighted average common stock outstanding – diluted
    
59,906
      
59,784
      
59,879
      
59,668
  
                                 
Net earnings per share attributable to Kirby common stockholders:
                                
Basic
  
$
0.80
    
$
0.70
    
$
2.33
    
$
1.72
  
Diluted
  
$
0.80
    
$
0.70
    
$
2.32
    
$
1.72
  


Certain outstanding options to purchase approximately 297,000 and 189,000 shares of common stock were excluded in the computation of diluted earnings per share as of September 30, 2019 and 2018, respectively, as such stock options would have been antidilutive.  Certain outstanding RSUs to convert to 5,000 shares of common stock were also excluded in the computation of diluted earnings per share as of September 30, 2019 as such RSUs would have been antidilutive.