Asset Retirement Obligations (Tables)

12 Months Ended

Sep. 30, 2024

Asset Retirement Obligation [Abstract]

Schedule of Change in Asset Retirement Obligation

The following is a reconciliation of the change in the Company’s asset retirement obligations:

	Year Ended September 30
	2024		2023		2022
	(Thousands)
Balance at Beginning of Year	$	165,492	$	161,545	$	209,639
Liabilities Incurred	2,367		3,313		2,401
Revisions of Estimates	51,967		6,728		10,700
Liabilities Settled	(25,556)		(14,448)		(71,171)
Accretion Expense	8,736		8,354		9,976
Balance at End of Year	$	203,006	$	165,492	$	161,545