Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2024

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligations

The following table shows the change in our asset retirement obligations (dollars in thousands):

	2024		2023
Asset retirement obligations at the beginning of year	$	966,001	$	797,762
Changes attributable to:
Accretion expense	56,143		44,269
Settlements	(18,379)		(14,039)
Estimated cash flow revisions	142,821		135,323
Newly incurred obligation	—		2,686
Asset retirement obligations at the end of year	$	1,146,586	$	966,001