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Valuation and Qualifying Accounts
12 Months Ended
Sep. 30, 2011
Valuation and Qualifying Accounts [Abstract] 
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
VALUATION AND QUALIFYING ACCOUNTS
YEARS ENDED SEPTEMBER 30, 2011, 2010 and 2009

(Thousands)
 
ADDITIONS
 
 
CLASSIFICATION
BEGINNING
BALANCE
CHARGED TO
EXPENSE
OTHER (1)
ENDING BALANCE
2011
 
 
 
 
Regulatory asset
$
212

(71
)
—

$
141

Allowance for Doubtful Accounts
$
2,993

4,865

(3,246
)
$
4,612

2010
 
 
 
 
Regulatory asset
$
282

(70
)
—

$
212

Allowance for Doubtful Accounts
$
6,064

3,307

(6,378
)
$
2,993

2009
 
 
 
 
Regulatory asset
$
102

—

180

$
282

Allowance for Doubtful Accounts
$
4,580

9,588

(8,104
)
$
6,064

(1)
Uncollectible accounts written off, less recoveries and adjustments.