Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net Income Available for Common Stock	$ 132,392	$ 77,774
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Gain on Sale of Timber Properties	0	(51,066)
Impairment of Oil and Gas Producing Properties	0	76,152
Depreciation, Depletion and Amortization	88,578	83,120
Deferred Income Taxes	44,122	26,591
Stock-Based Compensation	5,487	3,933
Other	4,675	2,887
Change in:
Receivables and Unbilled Revenue	(98,688)	(63,606)
Gas Stored Underground and Materials, Supplies and Emission Allowances	17,111	13,873
Unrecovered Purchased Gas Costs	526	(367)
Other Current Assets	(4,654)	(251)
Accounts Payable	(10,888)	(541)
Amounts Payable to Customers	15	(4,965)
Customer Advances	(2,603)	713
Customer Security Deposits	981	424
Other Accruals and Current Liabilities	5,044	27,615
Other Assets	(6,838)	10,066
Other Liabilities	(3,777)	2,391
Net Cash Provided by Operating Activities	171,483	204,743
INVESTING ACTIVITIES
Capital Expenditures	(213,491)	(183,301)
Net Proceeds from Sale of Timber Properties	0	104,582
Sale of Fixed Income Mutual Fund Shares in Grantor Trust	30,000	0
Other	13,781	11,849
Net Cash Used in Investing Activities	(169,710)	(66,870)
Financing Activities
Changes in Notes Payable to Banks and Commercial Paper	7,500	(5,000)
Dividends Paid on Common Stock	(41,487)	(40,475)
Net Repurchases of Common Stock	(8,859)	(3,526)
Net Cash Used in Financing Activities	(42,846)	(49,001)
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	(41,073)	88,872
Cash, Cash Equivalents and Restricted Cash at October 1	120,138	20,541
Cash, Cash Equivalents and Restricted Cash at December 31	79,065	109,413
Supplemental Disclosure of Cash Flow Information, Non-Cash Investing Activities:
Non-Cash Capital Expenditures	$ 81,010	$ 52,142