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FAIR VALUE (Tables)
12 Months Ended
Sep. 30, 2011
Fair Value Disclosures [Abstract] 
Fair Value, by Balance Sheet Grouping [Text Block]
The estimated fair value of long-term debt, including current maturities, is based on quoted market prices for similar issues and is as follows:
 
September 30,
(Thousands)
2011
2010
Carrying value
$
434,372

$
460,182

Fair market value
$
471,022

$
495,035

Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis [Text Block]
Assets and liabilities measured at fair value on a recurring basis are summarized as follows:
 
Quoted Prices in Active Markets for Identical Assets
Significant Other Observable Inputs
Significant
Unobservable
Inputs
 
(Thousands)
(Level 1)
(Level 2)
(Level 3)
Total
As of September 30, 2011:
 
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
 
Physical forward commodity contracts
 
$

 
 
$
37,690

 
 
$

 
$
37,690

Financial derivative contracts - natural gas
 
25,617

 
 
43,266

 
 

 
68,883

Financial commodity contracts - foreign exchange
 

 
 
280

 
 


 
280

Available for sale equity securities - energy industry (1)
 
10,348

 
 

 
 

 
10,348

Other
 
2,820

 
 

 
 

 
2,820

Total assets at fair value
 
$
38,785

 
 
$
81,236

 
 
$

 
$
120,021

 
 
 
 
 
 
 
 
 
 
 
Liabilities:
 
 
 
 
 
 
 
 
 
 
Physical forward commodity contracts
 
$

 
 
$
11,351

 
 
$

 
$
11,351

Financial commodity contracts - natural gas
 
23,715

 
 
39,959

 
 

 
63,674

Financial commodity contracts - foreign exchange
 

 
 
14

 
 

 
14

Other
 
616

 
 

 
 

 
616

Total liabilities at fair value
 
$
24,331

 
 
$
51,324

 
 
$

 
$
75,655

 
 
 
 
 
 
 
 
 
 
 
As of September 30, 2010:
 
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
 
Physical forward commodity contracts
 
$

 
 
$
24,048

 
 
$

 
$
24,048

Financial derivative contracts - natural gas
 
58,824

 
 
60,246

 
 

 
119,070

Financial commodity contracts - foreign exchange
 

 
 
25

 
 

 
25

Available for sale equity securities - energy industry (1)
 
10,290

 
 

 
 

 
10,290

Other
 
947

 
 

 
 

 
947

Total assets at fair value
 
$
70,061

 
 
$
84,319

 
 
$

 
$
154,380

 
 
 
 
 
 
 
 
 
 
 
Liabilities:
 
 
 
 
 
 
 
 
 
 
Physical forward commodity contracts
 
$

 
 
$
6,058

 
 
$

 
$
6,058

Financial derivative contracts - natural gas
 
38,497

 
 
39,532

 
 

 
78,029

Other
 
936

 
 

 
 

 
936

Total liabilities at fair value
 
$
39,433

 
 
$
45,590

 
 
$

 
$
85,023

(1)
Included in other noncurrent assets in the Consolidated Balance Sheets.