Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2024

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table sets forth, by level within the fair value hierarchy, the Company's financial assets and liabilities (as applicable) that were accounted for at fair value on a recurring basis as of June 30, 2024 and September 30, 2023.  Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  

Recurring Fair Value Measures	At fair value as of June 30, 2024
(Thousands of Dollars)	Level 1		Level 2		Level 3		Netting Adjustments(1)		Total(1)
Assets:
Cash Equivalents – Money Market Mutual Funds	$	72,625	$	—	$	—	$	—	$	72,625
Derivative Financial Instruments:
Over the Counter Swaps – Gas	—		85,623		—		(17,654)		67,969
Over the Counter No Cost Collars – Gas	—		33,876		—		(3,060)		30,816
Contingent Consideration for Asset Sale	—		2,429		—		—		2,429
Foreign Currency Contracts	—		185		—		(1,082)		(897)
Other Investments:
Balanced Equity Mutual Fund	18,464		—		—		—		18,464
Fixed Income Mutual Fund	16,745		—		—		—		16,745
Total	$	107,834	$	122,113	$	—	$	(21,796)	$	208,151
Liabilities:
Derivative Financial Instruments:
Over the Counter Swaps – Gas	$	—	$	21,018	$	—	$	(17,654)	$	3,364
Over the Counter No Cost Collars – Gas	—		2,190		—		(3,060)		(870)
Foreign Currency Contracts	—		1,082		—		(1,082)		—
Total	$	—	$	24,290	$	—	$	(21,796)	$	2,494
Total Net Assets/(Liabilities)	$	107,834	$	97,823	$	—	$	—	$	205,657

Recurring Fair Value Measures	At fair value as of September 30, 2023
(Thousands of Dollars)	Level 1		Level 2		Level 3		Netting Adjustments(1)		Total(1)
Assets:
Cash Equivalents – Money Market Mutual Funds	$	39,332	$	—	$	—	$	—	$	39,332
Derivative Financial Instruments:
Over the Counter Swaps – Gas	—		65,800		—		(37,508)		28,292
Over the Counter No Cost Collars – Gas	—		30,966		—		(14,745)		16,221
Contingent Consideration for Asset Sale	—		7,277		—		—		7,277
Foreign Currency Contracts	—		150		—		(1,453)		(1,303)
Other Investments:
Balanced Equity Mutual Fund	15,837		—		—		—		15,837
Fixed Income Mutual Fund	15,897		—		—		—		15,897
Total	$	71,066	$	104,193	$	—	$	(53,706)	$	121,553
Liabilities:
Derivative Financial Instruments:
Over the Counter Swaps – Gas	$	—	$	68,311	$	—	$	(37,508)	$	30,803
Over the Counter No Cost Collars – Gas	—		14,950		—		(14,745)		205
Foreign Currency Contracts	—		1,454		—		(1,453)		1
Total	$	—	$	84,715	$	—	$	(53,706)	$	31,009
Total Net Assets/(Liabilities)	$	71,066	$	19,478	$	—	$	—	$	90,544

(1)Netting Adjustments represent the impact of legally-enforceable master netting arrangements that allow the Company to net gain and loss positions held with the same counterparties. The net asset or net liability for each counterparty is recorded as an asset or liability on the Company’s balance sheet.