Summary Of Significant Accounting Policies (Tables)

3 Months Ended

Dec. 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):

	Three Months Ended  December 31, 2023				Three Months Ended  December 31, 2022
	Balance at December 31, 2023		Balance at October 1, 2023		Balance at December 31, 2022		Balance at October 1, 2022
Cash and Temporary Cash Investments	$	41,685	$	55,447	$	244,475	$	46,048
Hedging Collateral Deposits	—		—		1,600		91,670
Cash, Cash Equivalents, and Restricted Cash	$	41,685	$	55,447	$	246,075	$	137,718

Schedule of Allowance for Uncollectible Accounts

Activity in the allowance for uncollectible accounts for the three months ended December 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
Three Months Ended December 31, 2023
Allowance for Uncollectible Accounts	$	36,295	$	4,157	$	119	$	(3,455)	$	37,116
Three Months Ended December 31, 2022
Allowance for Uncollectible Accounts	$	40,228	$	5,035	$	228	$	(1,566)	$	43,925

Components of Accumulated Other Comprehensive Income (Loss)

The components of Accumulated Other Comprehensive Income (Loss) and changes for the three months ended December 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 December 31, 2023
Balance at October 1, 2023	$	4,623	$	(59,683)	$	(55,060)
Other Comprehensive Gains and Losses Before Reclassifications	136,681		—		136,681
Amounts Reclassified From Other Comprehensive Income	(14,240)		—		(14,240)
Balance at December 31, 2023	$	127,064	$	(59,683)	$	67,381
Three Months Ended December 31, 2022
Balance at October 1, 2022	$	(572,163)	$	(53,570)	$	(625,733)
Other Comprehensive Gains and Losses Before Reclassifications	216,216		—		216,216
Amounts Reclassified From Other Comprehensive Income	115,771		—		115,771
Balance at December 31, 2022	$	(240,176)	$	(53,570)	$	(293,746)

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 three months ended December 31, 2023 and 2022 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 December 31,
	2023	2022
Gains (Losses) on Derivative Financial Instrument Cash Flow Hedges:
Commodity Contracts	$19,755	($159,162)	Operating Revenues
Foreign Currency Contracts	(47)	(180)	Operating Revenues
	19,708	(159,342)	Total Before Income Tax
	(5,468)	43,571	Income Tax Expense
	$14,240	($115,771)	Net of Tax

Schedule of Other Current Assets

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

	At December 31, 2023		At September 30, 2023
Prepayments	$	17,993	$	18,966
Prepaid Property and Other Taxes	14,778		14,186
Federal Income Taxes Receivable	10,799		14,602
State Income Taxes Receivable	18,208		16,133
Regulatory Assets	37,622		36,373
	$	99,400	$	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 December 31, 2023		At September 30, 2023
Accrued Capital Expenditures	$	75,485	$	43,323
Regulatory Liabilities	35,770		38,105
Reserve for Gas Replacement	1,247		—
Liability for Royalty and Working Interests	25,529		17,679
Non-Qualified Benefit Plan Liability	13,052		13,052
Other	48,926		48,815
	$	200,009	$	160,974