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Unaudited Quarterly Financial Information Unaudited Quarterly Financial Information (Tables)
 12 Months Ended
Sep. 30, 2013
Quarterly Financial Information Disclosure [Abstract]  
Unaudited Quarterly Financial Information
Unaudited Quarterly Financial Information
2013
 
First
 
Second
 
Third
 
Fourth
 
Total
Operating revenues
$
2,579

 
$
2,741

 
$
2,602

 
$
3,034

 
$
10,956

Operating expenses
2,523

 
2,380

 
2,324

 
2,276

 
9,503

Operating income
56

 
361

 
278

 
758

 
1,453

Net income (loss)
(245
)
 
54

 
(12
)
 
474

 
271


Unaudited Quarterly Financial Information
2012
 
First
 
Second
 
Third
 
Fourth
 
Total
Operating revenues
$
2,568

 
$
2,604

 
$
2,777

 
$
3,271

 
$
11,220

Operating expenses
2,431

 
2,358

 
2,499

 
2,632

 
9,920

Operating income
137

 
246

 
278

 
639

 
1,300

Net income (loss)
(173
)
 
(94
)
 
(23
)
 
350

 
60