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Quarterly Results (unaudited)
12 Months Ended
Dec. 31, 2014
Quarterly Results (unaudited) [Abstract]  
Quarterly Results (unaudited)
Note 16.  Quarterly Results (unaudited)

The following table shows selected quarterly results for the Company.
 
(in thousands except per share data)
         
           
For the year ended December 31, 2014
 
First
  
Second
  
Third
  
Fourth
  
Total
 
Operating revenues
 
$
80,452
  
$
81,416
  
$
82,268
  
$
82,810
  
$
326,946
 
Operating income
  
15,680
   
15,793
   
14,144
   
16,326
   
61,943
 
Net income
  
8,616
   
8,615
   
8,003
   
8,649
   
33,883
 
                     
Net income per share – basic
  
0.36
   
0.36
   
0.33
   
0.36
   
1.41
 
Net income per share – diluted
  
0.36
   
0.35
   
0.33
   
0.35
   
1.39
 
                     
                     
For the year ended December 31, 2013
 
First
  
Second
  
Third
  
Fourth
  
Total
 
Operating revenues
 
$
76,010
  
$
77,454
  
$
77,513
  
$
77,965
  
$
308,942
 
Operating income
  
15,209
   
14,500
   
13,262
   
12,436
   
55,407
 
Net income
  
8,351
   
7,842
   
6,717
   
6,676
   
29,586
 
                     
Net income per share – basic and diluted
  
0.35
   
0.33
   
0.28
   
0.27
   
1.23