CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 220,400	$ 119,023
Adjustments to reconcile net income to cash flows from operating activities
Unrealized (gain) loss on derivative instruments	(58,060)	13,627
Impairment of equity method investment	0	92,000
Depreciation and amortization	94,700	81,977
Amortization of acquired wholesale energy contracts	2,016	4,000
Allowance for equity used during construction	(9,197)	(16,820)
Allowance for doubtful accounts	1,768	15,288
Non cash lease expense	3,720	3,048
Deferred income taxes	37,547	4,816
Equivalent value of ITCs recognized on equipment financing	(1,060)	0
Manufactured gas plant remediation costs	(16,341)	(23,775)
Equity in earnings, net of distributions received from equity investees	0	(3,469)
Cost of removal - asset retirement obligations	(847)	(768)
Contributions to postemployment benefit plans	(2,702)	(2,347)
Taxes related to stock-based compensation	(164)	(149)
Changes in:
Components of working capital	(97,572)	(9,805)
Other noncurrent assets	(7,639)	53,430
Other noncurrent liabilities	69,308	11,720
Cash flows from operating activities	235,877	341,796
Expenditures for:
Cost of removal	(27,881)	(37,922)
Distribution from equity investees in excess of equity in earnings	690	733
Investments in equity investees, net of return of capital	5,479
Investments in equity investees, net of return of capital		(690)
Cash flows used in investing activities	(434,945)	(429,870)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Proceeds from long-term debt	310,000	0
Payments of long-term debt	(14,223)	(10,463)
Proceeds from term loan	150,000	0
(Payments of) proceeds from short-term debt, net	(156,950)	50,950
Proceeds from sale leaseback transactions - solar	3,300	17,673
Proceeds from sale leaseback transactions	17,300	0
Payments of common stock dividends	(95,691)	(90,377)
Cash settlement of equity forward agreement	0	(2,823)
Proceeds from issuance of common stock - DRP	11,076	11,520
Tax withholding payments related to net settled stock compensation	(3,794)	(1,819)
Cash flows from (used in) financing activities	221,018	(25,339)
Change in cash, cash equivalents and restricted cash	21,950	(113,413)
Cash, cash equivalents and restricted cash at beginning of period	6,043	119,423
Cash, cash equivalents and restricted cash at end of period	27,993	6,010
CHANGES IN COMPONENTS OF WORKING CAPITAL
Receivables	(61,836)	(75,730)
Inventories	(12,672)	42,639
Recovery of natural gas costs	3,772	(19,208)
Natural gas purchases payable	33,362	20,073
Natural gas purchases payable - related parties	(6)	72
Deferred revenue	44,304	(798)
Accounts payable and other	(70,194)	13,453
Prepaid expenses	(1,219)	(3,624)
Prepaid and accrued taxes	18,770	(7,236)
Restricted broker margin accounts	(47,643)	25,308
Customers' credit balances and deposits	(10,370)	(3,235)
Other current assets	6,160	(1,519)
Total	(97,572)	(9,805)
Cash paid for:
Interest (net of amounts capitalized)	65,385	66,322
Income taxes	3,763	5,357
Accrued capital expenditures	40,833	36,988
Utility plant
Expenditures for:
Payments to acquire PP&E	(177,559)	(289,205)
Solar equipment
Expenditures for:
Payments to acquire PP&E	(105,504)	(51,545)
Storage and Transportation and other
Expenditures for:
Payments to acquire PP&E	$ (130,170)	$ (51,241)