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FAIR VALUE (Tables)
 6 Months Ended
Mar. 31, 2014
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping
The estimated fair value of long-term debt, including current maturities and excluding capital leases, is as follows:
(Thousands)
March 31,
2014
September 30,
2013
Carrying value
$
594,845

$
529,845

Fair market value
$
622,213

$
556,518
Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis
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 March 31, 2014:
 
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
 
Physical forward commodity contracts
 
$
—

 
 
$
5,832

 
 
$
—

 
$
5,832

Financial derivative contracts - natural gas
 
41,620

 
 
—

 
 
—

 
41,620

Financial derivative contracts - foreign exchange
 
—

 
 
—

 
 
—

 
—

Available for sale equity securities - energy industry (1)
 
11,218

 
 
—

 
 
—

 
11,218

Other (2)
 
1,263

 
 
—

 
 
—

 
1,263

Total assets at fair value
 
$
54,101

 
 
$
5,832

 
 
$
—

 
$
59,933

Liabilities:
 
 
 
 
 
 
 
 
 
 
Physical forward commodity contracts
 
$
—

 
 
$
35,680

 
 
$
—

 
$
35,680

Financial derivative contracts - natural gas
 
40,451

 
 
—

 
 
—

 
40,451

Financial derivative contracts - foreign exchange
 
—

 
 
284

 
 
—

 
284

Total liabilities at fair value
 
$
40,451

 
 
$
35,964

 
 
$
—

 
$
76,415

As of September 30, 2013:
 
 
 
 
 
 
 
 
 
 
Assets:
 
 
 
 
 
 
 
 
 
 
Physical forward commodity contracts
 
$
—

 
 
$
11,823

 
 
$
—

 
$
11,823

Financial derivative contracts - natural gas
 
44,249

 
 
—

 
 
—

 
44,249

Financial derivative contracts - foreign exchange
 
—

 
 
16

 
 
—

 
16

Available for sale equity securities - energy industry (1)
 
11,716

 
 
—

 
 
—

 
11,716

Other (2)
 
1,129

 
 
—

 
 
—

 
1,129

Total assets at fair value
 
$
57,094

 
 
$
11,839

 
 
$
—

 
$
68,933

Liabilities:
 
 
 
 
 
 
 
 
 
 
Physical forward commodity contracts
 
$
—

 
 
$
14,595

 
 
$
—

 
$
14,595

Financial derivative contracts - natural gas
 
28,248

 
 
—

 
 
—

 
28,248

Financial derivative contracts - foreign exchange
 
—

 
 
5

 
 
—

 
5

Total liabilities at fair value
 
$
28,248

 
 
$
14,600

 
 
$
—

 
$
42,848


(1)
Included in Other noncurrent assets on the Unaudited Condensed Consolidated Balance Sheets.
(2)
Includes various money market funds.