Summary Of Significant Accounting Policies (Tables)

6 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash

The components, as reported on the Company’s Consolidated Balance Sheets, of the total cash, cash equivalents, and restricted cash presented on the Statement of Cash Flows are as follows (in thousands):

	Six Months Ended  March 31, 2023				Six Months Ended  March 31, 2022
	Balance at March 31, 2023		Balance at October 1, 2022		Balance at March 31, 2022		Balance at October 1, 2021
Cash and Temporary Cash Investments	$	71,533	$	46,048	$	52,569	$	31,528
Hedging Collateral Deposits	—		91,670		102,370		88,610
Cash, Cash Equivalents, and Restricted Cash	$	71,533	$	137,718	$	154,939	$	120,138

Schedule of Allowance for Uncollectible Accounts

Activity in the allowance for uncollectible accounts for the six months ended March 31, 2023 and 2022 are as follows (in thousands):

	Balance at Beginning of Period		Additions Charged to Costs and Expenses		Discounts on Purchased Receivables		Net Accounts Receivable Written-Off		Balance at End of Period
Six Months Ended March 31, 2023
Allowance for Uncollectible Accounts	$	40,228	$	10,973	$	916	$	(3,971)	$	48,146
Six Months Ended March 31, 2022
Allowance for Uncollectible Accounts	$	31,639	$	9,684	$	790	$	(630)	$	41,483

Components of Accumulated Other Comprehensive Loss

The components of Accumulated Other Comprehensive Loss and changes for the six months ended March 31, 2023 and 2022, net of related tax effect, are as follows (amounts in parentheses indicate debits) (in thousands): 

	Gains and Losses on Derivative Financial Instruments		Funded Status of the Pension and Other Post-Retirement Benefit Plans		Total
Three Months Ended March 31, 2023
Balance at January 1, 2023	$	(240,176)	$	(53,570)	$	(293,746)
Other Comprehensive Gains and Losses Before Reclassifications	225,150		—		225,150
Amounts Reclassified From Other Comprehensive Income	13,732		—		13,732
Balance at March 31, 2023	$	(1,294)	$	(53,570)	$	(54,864)
Six Months Ended March 31, 2023
Balance at October 1, 2022	$	(572,163)	$	(53,570)	$	(625,733)
Other Comprehensive Gains and Losses Before Reclassifications	441,367		—		441,367
Amounts Reclassified From Other Comprehensive Income	129,502		—		129,502
Balance at March 31, 2023	$	(1,294)	$	(53,570)	$	(54,864)
Three Months Ended March 31, 2022
Balance at January 1, 2022	$	(213,391)	$	(63,635)	$	(277,026)
Other Comprehensive Gains and Losses Before Reclassifications	(466,001)		—		(466,001)
Amounts Reclassified From Other Comprehensive Loss	94,580		—		94,580
Other Post-Retirement Adjustment for Regulatory Proceeding	—		(5,807)		(5,807)
Balance at March 31, 2022	$	(584,812)	$	(69,442)	$	(654,254)
Six Months Ended March 31, 2022
Balance at October 1, 2021	$	(449,962)	$	(63,635)	$	(513,597)
Other Comprehensive Gains and Losses Before Reclassifications	(347,518)		—		(347,518)
Amounts Reclassified From Other Comprehensive Loss	212,668		—		212,668
Other Post-Retirement Adjustment for Regulatory Proceeding	—		(5,807)		(5,807)
Balance at March 31, 2022	$	(584,812)	$	(69,442)	$	(654,254)

Schedule of Reclassifications Out of Accumulated Other Comprehensive Loss

The details about the reclassification adjustments out of accumulated other comprehensive loss for the six months ended March 31, 2023 and 2022 are as follows (amounts in parentheses indicate debits to the income statement) (in thousands):

Details About Accumulated Other Comprehensive Loss Components	Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Loss				Affected Line Item in the Statement Where Net Income is Presented
	Three Months Ended March 31,		Six Months Ended March 31,
	2023	2022	2023	2022
Gains (Losses) on Derivative Financial Instrument Cash Flow Hedges:
Commodity Contracts	($18,768)	($130,271)	($177,930)	($292,899)	Operating Revenues
Foreign Currency Contracts	(172)	50	(351)	90	Operating Revenues
	(18,940)	(130,221)	(178,281)	(292,809)	Total Before Income Tax
	5,208	35,641	48,779	80,141	Income Tax Expense
	($13,732)	($94,580)	($129,502)	($212,668)	Net of Tax

Schedule of Other Current Assets

The components of the Company’s Other Current Assets are as follows (in thousands):

	At March 31, 2023		At September 30, 2022
Prepayments	$	14,821	$	17,757
Prepaid Property and Other Taxes	23,218		14,321
Prepaid State Income Taxes	5,132		5,933
Regulatory Assets	32,062		21,358
	$	75,233	$	59,369

Schedule of Other Accruals and Current Liabilities

The components of the Company’s Other Accruals and Current Liabilities are as follows (in thousands):

	At March 31, 2023		At September 30, 2022
Accrued Capital Expenditures	$	39,232	$	64,720
Regulatory Liabilities	39,662		31,293
Reserve for Gas Replacement	106,835		—
Liability for Royalty and Working Interests	14,365		86,206
Non-Qualified Benefit Plan Liability	17,474		17,474
Other	40,355		57,634
	$	257,923	$	257,327