Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2023

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligations

The following schedule shows the change in our asset retirement obligations for the nine months ended September 30, 2023 (dollars in thousands): 

	2023
Asset retirement obligations at January 1, 2023	$	797,762
Changes attributable to:
Accretion expense	32,763
Settlements	(5,750)
Estimated cash flow revisions	70,405
Asset retirement obligations at September 30, 2023	$	895,180