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Note 14 - Quarterly Financial Information (Unaudited)
 12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Quarterly Financial Information [Text Block]
1
4.
  Quarterly Financial Information (Unaudited)
 
As further discussed in Note
7,
Income Taxes, our
fourth
quarter
2017,
net earnings and earnings per share include the effect of a
$309.2
million
provisional amount recorded as a component of income tax expense from continuing operations resulting from the remeasurement of our deferred tax balance due to the enactment of the Tax Cuts and Jobs Act. Operating results by quarter for the years ended
December 31, 2017
and
2016
are as follows (in thousands, except per share data):
 
   
Quarter
  
   
First
    
Second
    
Third
    
Fourth
  
201
7:
                                
Operating revenues
   $
1,629,158
     $
1,726,915
     $
1,843,334
     $
1,990,160
  
Operating income
   $
149,389
     $
163,615
     $
164,972
     $
145,814
  
Net earnings
   $
102,702
     $
97,869
     $
100,385
     $
385,308
  
Basic earnings per share
   $
0.93
     $
0.89
     $
0.92
     $
3.51
  
Diluted earnings per share
   $
0.92
     $
0.88
     $
0.91
     $
3.48
  
                                 
201
6:
                                
Operating revenues
   $
1,528,712
     $
1,615,026
     $
1,690,659
     $
1,721,062
  
Operating income
   $
167,890
     $
175,792
     $
182,977
     $
194,361
  
Net earnings
   $
100,098
     $
105,011
     $
109,425
     $
117,556
  
Basic earnings per share
   $
0.89
     $
0.93
     $
0.97
     $
1.05
  
Diluted earnings per share
   $
0.88
     $
0.92
     $
0.97
     $
1.05
  
 
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