Annual report pursuant to Section 13 and 15(d)

Quarterly Results of Operations (Unaudited) (Tables)

v2.4.0.8
Quarterly Results of Operations (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2013
Quarterly Results of Operations (Unaudited) [Abstract]  
Schedule of Quarterly Financial Information [Table Text Block]
 
 
2013
 
 
March 31
 
June 30
 
September 30
 
December 31
Operating revenue
 
$
141,560

 
$
159,804

 
$
170,033

 
$
181,084

Income from operations
 
15,790

 
22,505

 
22,857

 
23,203

Net income
 
10,855

 
13,831

 
14,197

 
15,584

 
 
 
 
 
 
 
 
 
Net income per share:
 
 
 
 
 
 
 
 
   Basic
 
$
0.37

 
$
0.46

 
$
0.47

 
$
0.51

   Diluted
 
$
0.36

 
$
0.45

 
$
0.46

 
$
0.50

 
 
 
 
 
 
 
 
 
 
 
2012
 
 
March 31
 
June 30
 
September 30
 
December 31
Operating revenue
 
$
137,081

 
$
148,326

 
$
143,514

 
$
155,525

Income from operations
 
16,789

 
23,083

 
19,626

 
24,034

Net income
 
10,273

 
14,167

 
12,267

 
15,961

 
 
 
 
 
 
 
 
 
Net income per share:
 
 
 
 
 
 
 
 
   Basic
 
$
0.36

 
$
0.49

 
$
0.42

 
$
0.55

   Diluted
 
$
0.35

 
$
0.48

 
$
0.41

 
$
0.54