Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 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 December 31, 2024 and September 30, 2024.  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 December 31, 2024
(Thousands of Dollars)	Level 1		Level 2		Level 3		Netting Adjustments(1)		Total(1)
Assets:
Cash Equivalents – Money Market Mutual Funds	$	41,745	$	—	$	—	$	—	$	41,745
Derivative Financial Instruments:
Over the Counter Swaps – Gas	—		43,937		—		(31,220)		12,717
Over the Counter No Cost Collars – Gas	—		18,426		—		(10,380)		8,046
Contingent Consideration for Asset Sale	—		380		—		—		380
Foreign Currency Contracts	—		52		—		(500)		(448)
Other Investments:
Balanced Equity Mutual Fund	12,241		—		—		—		12,241
Fixed Income Mutual Fund	16,281		—		—		—		16,281
Total	$	70,267	$	62,795	$	—	$	(42,100)	$	90,962
Liabilities:
Derivative Financial Instruments:
Over the Counter Swaps – Gas	$	—	$	41,848	$	—	$	(31,220)	$	10,628
Over the Counter No Cost Collars – Gas	—		19,266		—		(10,380)		8,886
Foreign Currency Contracts	—		1,879		—		(500)		1,379
Total	$	—	$	62,993	$	—	$	(42,100)	$	20,893
Total Net Assets/(Liabilities)	$	70,267	$	(198)	$	—	$	—	$	70,069

Recurring Fair Value Measures	At fair value as of September 30, 2024
(Thousands of Dollars)	Level 1		Level 2		Level 3		Netting Adjustments(1)		Total(1)
Assets:
Cash Equivalents – Money Market Mutual Funds	$	29,238	$	—	$	—	$	—	$	29,238
Derivative Financial Instruments:
Over the Counter Swaps – Gas	—		76,009		—		(17,198)		58,811
Over the Counter No Cost Collars – Gas	—		32,584		—		(3,774)		28,810
Contingent Consideration for Asset Sale	—		729		—		—		729
Foreign Currency Contracts	—		281		—		(726)		(445)
Other Investments:
Balanced Equity Mutual Fund	19,523		—		—		—		19,523
Fixed Income Mutual Fund	17,374		—		—		—		17,374
Total	$	66,135	$	109,603	$	—	$	(21,698)	$	154,040
Liabilities:
Derivative Financial Instruments:
Over the Counter Swaps – Gas	$	—	$	22,206	$	—	$	(17,198)	$	5,008
Over the Counter No Cost Collars – Gas	—		3,501		—		(3,774)		(273)
Foreign Currency Contracts	—		726		—		(726)		—
Total	$	—	$	26,433	$	—	$	(21,698)	$	4,735
Total Net Assets/(Liabilities)	$	66,135	$	83,170	$	—	$	—	$	149,305

(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.

Fair Value Measurements, Nonrecurring

The following table presents impairments of assets associated with certain nonrecurring fair value measurements within Level 3 of the fair value hierarchy as of December 31, 2024 and 2023 (in thousands):

					Impairments
Nonrecurring Fair Value Measures					Quarter Ended December 31,
	Segment	Date of Measurement	Fair Value		2024		2023
Impairment of Assets:
Water Disposal Assets	Exploration and Production	December 31, 2024	$	12,880	$	33,453	$	—