Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
ASSETS
Property, Plant and Equipment	$ 5,922,308	$ 5,646,918
Less - Accumulated Depreciation, Depletion and Amortization	1,694,366	1,646,394
Property, Plant and Equipment, Net, Total	4,227,942	4,000,524
Current Assets
Cash and Temporary Cash Investments	224,262	80,428
Hedging Collateral Deposits	25,118	19,701
Receivables - Net of Allowance for Uncollectible Accounts of $35,849 and $31,039, Respectively	152,888	131,885
Unbilled Utility Revenue	47,335	17,284
Gas Stored Underground	50,808	54,325
Materials and Supplies - at average cost	27,263	27,932
Unrecovered Purchased Gas Costs	3,002	0
Other Current Assets	43,516	38,334
Deferred Income Taxes	14,921	15,423
Total Current Assets	589,113	385,312
Other Assets
Recoverable Future Taxes	145,469	144,377
Unamortized Debt Expense	14,579	10,571
Other Regulatory Assets	570,927	574,644
Deferred Charges	4,429	5,552
Other Investments	81,055	79,365
Goodwill	5,476	5,476
Fair Value of Derivative Financial Instruments	106,115	76,085
Other	2,650	2,836
Total Other Assets	930,700	898,906
Total Assets	5,747,755	5,284,742
Capitalization:
Common Stock, $1 Par Value Authorized - 200,000,000 Shares; Issued and Outstanding - 83,038,485 Shares and 82,812,677 Shares, Respectively	83,038	82,813
Paid in Capital	654,000	650,749
Earnings Reinvested in the Business	1,237,242	1,206,022
Total Common Shareholders' Equity Before Items of Other Comprehensive Loss	1,974,280	1,939,584
Accumulated Other Comprehensive Loss	(53,132)	(47,699)
Total Comprehensive Shareholders' Equity	1,921,148	1,891,885
Long-Term Debt, Net of Current Portion	1,399,000	899,000
Total Capitalization	3,320,148	2,790,885
Current and Accrued Liabilities
Notes Payable to Banks and Commercial Paper	20,000	40,000
Current Portion of Long-Term Debt	0	150,000
Accounts Payable	105,209	126,709
Amounts Payable to Customers	11,997	15,519
Dividends Payable	29,479	29,399
Interest Payable on Long-Term Debt	16,320	25,512
Customer Advances	25,814	19,643
Customer Security Deposits	17,685	17,321
Other Accruals and Current Liabilities	146,251	94,787
Fair Value of Derivative Financial Instruments	48,210	9,728
Total Current and Accrued Liabilities	420,965	528,618
Deferred Credits
Deferred Income Taxes	991,805	955,384
Taxes Refundable to Customers	65,547	65,543
Unamortized Investment Tax Credit	2,441	2,586
Cost of Removal Regulatory Liability	144,770	135,940
Other Regulatory Liabilities	100,832	94,684
Pension and Other Post-Retirement Liabilities	467,396	481,520
Asset Retirement Obligations	76,930	75,731
Other Deferred Credits	156,921	153,851
Total Deferred Credits	2,006,642	1,965,239
Commitments and Contingencies
Total Capitalization and Liabilities	$ 5,747,755	$ 5,284,742