Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Current assets:
Cash and cash equivalents	$ 1,259	$ 7,267
Restricted cash	0	4,308
Accounts receivable (less allowances for doubtful accounts of $3,588 and $6,368, respectively)	47,362	58,736
Accounts receivable - related parties	4,571	7,048
Accrued utility revenues	16,911	14,807
Inventories	67,334	104,263
Deferred income taxes	46,436	42,528
Income taxes recoverable	9,461	9,430
Regulatory assets	6,473	8,608
Derivative financial instruments	5,468	68
Prepaid expenses & other current assets	19,852	15,481
Total current assets	225,127	272,544
Property, plant and equipment	2,295,669	2,201,021
Less accumulated depreciation and amortization	(815,720)	(782,665)
Net property, plant and equipment	1,479,949	1,418,356
Goodwill	182,145	182,145
Regulatory assets	331,932	291,847
Other assets	4,026	4,456
Total assets	2,223,179	2,169,348
Current liabilities:
Current maturities of long-term debt	133,000	40,000
Bank loans	9,200	0
Accounts payable - trade	46,754	53,556
Accounts payable - related parties	10,192	10,108
Employee compensation and benefits accrued	10,902	12,770
Interest accrued	22,766	12,319
Customer deposits and refunds	49,806	54,127
Derivative financial instruments	36,011	11,928
Deferred fuel refunds	4,435	6,578
Pension and postretirement benefit obligations	15,802	28,228
Other current liabilities	31,816	33,405
Total current liabilities	370,684	263,019
Long-term debt	467,000	600,000
Deferred income taxes	417,052	361,468
Deferred investment tax credits	4,612	4,958
Pension and postretirement benefit obligations	179,056	142,248
Other noncurrent liabilities	56,262	78,810
Total liabilities	1,494,666	1,450,503
Commitments and contingencies (Note 12)
Common stockholder's equity:
Common Stock, $2.25 par value (authorized - 40,000,000 shares; issued and outstanding - 26,781,785 shares)	60,259	60,259
Additional paid-in capital	468,692	468,323
Retained earnings	229,379	212,096
Accumulated other comprehensive loss	(29,817)	(21,833)
Total common stockholder's equity	728,513	718,845
Total liabilities and stockholder's equity	$ 2,223,179	$ 2,169,348