Annual report pursuant to Section 13 and 15(d)

Quarterly Results of Operations (Unaudited)

v3.10.0.1
Quarterly Results of Operations (Unaudited)
 12 Months Ended
Dec. 31, 2018
Quarterly Results of Operations (Unaudited) [Abstract]  
Quarterly Financial Information [Text Block]
Quarterly Results of Operations (Unaudited)

The following is a summary of the quarterly results of operations for the years ended December 31, 2018 and 2017: 
 
 
2018
 
 
March 31
 
June 30
 
September 30
 
December 31
Operating revenue
 
$
302,608

 
$
330,343

 
$
331,375

 
$
356,561

Income from operations
 
24,235

 
32,870

 
29,879

 
35,047

Net income
 
17,741

 
24,298

 
22,329

 
27,684

 
 
 
 
 
 
 
 
 
Net income per share:
 
 
 
 
 
 
 
 
   Basic
 
$
0.60

 
$
0.83

 
$
0.76

 
$
0.95

   Diluted
 
$
0.60

 
$
0.82

 
$
0.76

 
$
0.95

 
 
 
 
 
 
 
 
 
 
 
2017
 
 
(As Adjusted)
 
 
March 31
 
June 30
 
September 30
 
December 31
Operating revenue
 
$
262,046

 
$
283,876

 
$
298,289

 
$
325,136

Income from operations
 
23,743

 
29,996

 
27,176

 
27,843

Net income
 
14,581

 
19,666

 
18,328

 
34,681

 
 
 
 
 
 
 
 
 
Net income per share:
 
 
 
 
 
 
 
 
   Basic
 
$
0.48

 
$
0.65

 
$
0.61

 
$
1.17

   Diluted
 
$
0.48

 
$
0.65

 
$
0.61

 
$
1.16