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INTERIM FINANCIAL INFORMATION (UNAUDITED) (Unaudited) (Tables)
 12 Months Ended
Sep. 30, 2013
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Financial Information Table
(Thousands, Except Per Share Amounts)
 

 
 

 
 

 
 

Three Months Ended
Dec. 31
 
March 31
 
June 30
 
Sept. 30
Fiscal Year 2013
 
 
 
 
 
 
 
Total Operating Revenues
$
307,003

 
$
397,613

 
$
165,289

 
$
147,114

Operating Income (Loss)
42,085

 
51,849

 
12,282

 
(9,722
)
Net Income (Loss)
25,568

 
30,242

 
6,584

 
(9,636
)
Basic Earnings (Loss) Per Share of Common Stock
1.14

 
1.34

 
0.25

 
(0.30
)
Diluted Earnings (Loss) Per Share of Common Stock
1.14

 
1.34

 
0.25

 
(0.30
)
 
 
 
 
 
 
 
 
Three Months Ended
Dec. 31
 
March 31
 
June 30
 
Sept. 30
Fiscal Year 2012
 
 
 
 
 
 
 
Total Operating Revenues
$
410,913

 
$
358,175

 
$
186,849

 
$
169,538

Operating Income
43,105

 
50,583

 
15,045

 
1,869

Net Income (Loss)
25,174

 
29,684

 
8,433

 
(651
)
Basic Earnings (Loss) Per Share of Common Stock
1.13

 
1.33

 
0.38

 
(0.03
)
Diluted Earnings (Loss) Per Share of Common Stock
1.12

 
1.32

 
0.38

 
(0.03
)