Financial Instruments (Tables)

3 Months Ended

Dec. 31, 2019

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 (in thousands): 

	December 31, 2019				September 30, 2019
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-Term Debt	$	2,134,339	$	2,253,232	$	2,133,718	$	2,257,085

Schedule Of Other Investments

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

	At December 31, 2019		At September 30, 2019
Life Insurance Contracts	$	41,336	$	41,074
Equity Mutual Fund	36,740		40,660
Fixed Income Mutual Fund	62,220		62,339
Marketable Equity Securities	933		844
	$	141,229	$	144,917

Schedule of Derivative Financial Instruments Designated And Qualifying As Cash Flow Hedges On The Statement Of Financial Performance

The Effect of Derivative Financial Instruments on the Statement of Financial Performance for the
Three Months Ended December 31, 2019 and 2018 (Thousands of Dollars)
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 Three Months Ended December 31,						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 Three Months Ended December 31,
	2019			2018				2019			2018
Commodity Contracts	$	(1,555	)	$	50,052		Operating Revenue	$	7,541		$	(18,522	)
Commodity Contracts	1,131			(1,279		)	Purchased Gas	2			(902		)
Foreign Currency Contracts	919			(4,255		)	Operating Revenue	(191		)	(1,093		)
Total	$	495		$	44,518			$	7,352		$	(20,517	)

Schedule Of Derivatives And Hedged Items in Fair Value Hedging Relationships

For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative as well as the offsetting gain or loss on the hedged item attributable to the hedged risk completely offset each other in current earnings, as shown below.

Derivatives in Fair Value Hedging Relationships	Location of Gain or (Loss) on Derivative and Hedged Item Recognized in the Consolidated Statement of Income	Amount of Gain or (Loss) on Derivative Recognized in the Consolidated Statement of Income for the Three Months Ended December 31, 2019 (In Thousands)			Amount of Gain or (Loss) on the Hedged Item Recognized in the Consolidated Statement of Income for the Three Months Ended December 31, 2019 (In Thousands)
Commodity Contracts	Operating Revenues	$	(732	)	$	732
Commodity Contracts	Purchased Gas	$	—		$	—
		$	(732	)	$	732