Financial Instruments (Tables)

12 Months Ended

Sep. 30, 2020

Financial Instruments, Owned, at Fair Value [Abstract]

Long-Term Debt

Based on these criteria, the fair market value of long-term debt, including current portion, was as follows:

	At September 30
	2020 Carrying Amount		2020 Fair Value		2019 Carrying Amount		2019 Fair Value
	(Thousands)
Long-Term Debt	$	2,629,576	$	2,778,556	$	2,133,718	$	2,257,085

Schedule of Other Investments

The components of the Company's Other Investments are as follows (in thousands):

	At September 30
	2020		2019
	(Thousands)
Life Insurance Contracts	$	41,992	$	41,074
Equity Mutual Fund	39,618		40,660
Fixed Income Mutual Fund	72,253		62,339
Marketable Equity Securities	639		844
	$	154,502	$	144,917

Schedule Of Derivatives Financial Instruments Designated And Qualifying As Cash Flow Hedges On The Statements Of Financial Performance

The Effect of Derivative Financial Instruments on the Statement of Financial Performance for the Year Ended September 30, 2020 and 2019 (Dollar Amounts in Thousands)
Derivatives in Cash Flow Hedging Relationships	Amount of Derivative Gain or (Loss) Recognized in Other Comprehensive Income (Loss) on the Consolidated Statement of Comprehensive Income (Loss) for the Year Ended September 30,				Location of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income	Amount of Derivative Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) on the Consolidated Balance Sheet into the Consolidated Statement of Income for the Year Ended September 30,
	2020		2019			2020		2019
Commodity Contracts	$	9,905	$	82,984	Operating Revenue	$	93,691	$	(3,460)
Commodity Contracts	391		(1,037)		Purchased Gas	661		(1,182)
Foreign Currency Contracts	(434)		(2,646)		Operating Revenue	(1,057)		(822)
Total	$	9,862	$	79,301		$	93,295	$	(5,464)