Annual report pursuant to Section 13 and 15(d)

Quarterly Results of Operations (Unaudited) (Tables)

v3.3.1.900
Quarterly Results of Operations (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2015
Quarterly Results of Operations (Unaudited) [Abstract]  
Schedule of Quarterly Financial Information [Table Text Block]
The following is a summary of the quarterly results of operations for the years ended December 31, 2015 and 2014: 
 
 
2015
 
 
March 31
 
June 30
 
September 30
 
December 31
Operating revenue
 
$
205,918

 
$
249,694

 
$
247,093

 
$
256,420

Income from operations
 
8,248

 
19,908

 
24,601

 
29,015

Net income
 
4,836

 
11,824

 
15,687

 
23,228

 
 
 
 
 
 
 
 
 
Net income per share:
 
 
 
 
 
 
 
 
   Basic
 
$
0.16

 
$
0.38

 
$
0.51

 
$
0.75

   Diluted
 
$
0.16

 
$
0.38

 
$
0.50

 
$
0.75

 
 
 
 
 
 
 
 
 
 
 
2014
 
 
March 31
 
June 30
 
September 30
 
December 31
Operating revenue
 
$
171,569

 
$
193,852

 
$
201,477

 
$
214,061

Income from operations
 
16,271

 
27,595

 
26,906

 
25,634

Net income
 
10,202

 
17,178

 
16,744

 
17,045

 
 
 
 
 
 
 
 
 
Net income per share:
 
 
 
 
 
 
 
 
   Basic
 
$
0.33

 
$
0.56

 
$
0.55

 
$
0.56

   Diluted
 
$
0.33

 
$
0.55

 
$
0.54

 
$
0.55