Summary Of Significant Accounting Policies (Tables)

6 Months Ended

Mar. 31, 2024

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, 2024				Six Months Ended  March 31, 2023
	Balance at March 31, 2024		Balance at October 1, 2023		Balance at March 31, 2023		Balance at October 1, 2022
Cash and Temporary Cash Investments	$	50,769	$	55,447	$	71,533	$	46,048
Hedging Collateral Deposits	—		—		—		91,670
Cash, Cash Equivalents, and Restricted Cash	$	50,769	$	55,447	$	71,533	$	137,718

Schedule of Allowance for Uncollectible Accounts

Activity in the allowance for uncollectible accounts for the six months ended March 31, 2024 and 2023 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, 2024
Allowance for Uncollectible Accounts	$	36,295	$	9,766	$	468	$	(6,834)	$	39,695
Six Months Ended March 31, 2023
Allowance for Uncollectible Accounts	$	40,228	$	10,973	$	916	$	(3,971)	$	48,146

Components of Accumulated Other Comprehensive Income (Loss)

The components of Accumulated Other Comprehensive Income (Loss) and changes for the six months ended March 31, 2024 and 2023, 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, 2024
Balance at January 1, 2024	$	127,064	$	(59,683)	$	67,381
Other Comprehensive Gains and Losses Before Reclassifications	51,418		—		51,418
Amounts Reclassified From Other Comprehensive Income	(43,459)		—		(43,459)
Balance at March 31, 2024	$	135,023	$	(59,683)	$	75,340
Six Months Ended March 31, 2024
Balance at October 1, 2023	$	4,623	$	(59,683)	$	(55,060)
Other Comprehensive Gains and Losses Before Reclassifications	188,099		—		188,099
Amounts Reclassified From Other Comprehensive Income	(57,699)		—		(57,699)
Balance at March 31, 2024	$	135,023	$	(59,683)	$	75,340
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)

Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss)

The details about the reclassification adjustments out of accumulated other comprehensive income (loss) for the six months ended March 31, 2024 and 2023 are as follows (amounts in parentheses indicate debits to the income statement) (in thousands):

Details About Accumulated Other Comprehensive Income (Loss) Components	Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss)				Affected Line Item in the Statement Where Net Income is Presented
	Three Months Ended March 31,		Six Months Ended  March 31,
	2024	2023	2024	2023
Gains (Losses) on Derivative Financial Instrument Cash Flow Hedges:
Commodity Contracts	$60,184	($18,768)	$79,939	($177,930)	Operating Revenues
Foreign Currency Contracts	(36)	(172)	(82)	(351)	Operating Revenues
	60,148	(18,940)	79,857	(178,281)	Total Before Income Tax
	(16,689)	5,208	(22,158)	48,779	Income Tax Expense
	$43,459	($13,732)	$57,699	($129,502)	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, 2024		At September 30, 2023
Prepayments	$	13,693	$	18,966
Prepaid Property and Other Taxes	23,308		14,186
Federal Income Taxes Receivable	—		14,602
State Income Taxes Receivable	12,277		16,133
Regulatory Assets	35,845		36,373
	$	85,123	$	100,260

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, 2024		At September 30, 2023
Accrued Capital Expenditures	$	40,361	$	43,323
Regulatory Liabilities	37,192		38,105
Reserve for Gas Replacement	20,139		—
Liability for Royalty and Working Interests	19,198		17,679
Federal Income Taxes Payable	11,747		—
Non-Qualified Benefit Plan Liability	13,052		13,052
Other	42,277		48,815
	$	183,966	$	160,974