Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2023

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Asset Retirement Obligations

The asset retirement obligations included in the Consolidated Balance Sheets in current and non-current liabilities, and the changes in that liability were as follows (in thousands):

	Year Ended December 31,
	2023			2022
Balance, beginning of period	$	541,661		$	434,006
Obligations assumed(1)		258,858			—
Obligations incurred		14,199			1,140
Obligations settled		(86,615	)		(69,596	)
Obligations divested		(19,448	)		(1,572	)
Accretion expense		86,152			55,995
Changes in estimate(2)		102,419			121,688
Balance, end of period	$	897,226		$	541,661
Less: Current portion		77,581			39,888
Long-term portion	$	819,645		$	501,773

(1)Assumed in connection with the EnVen Acquisition. See further discussion in Note 3 — Acquisitions and Divestitures.

(2)Changes in estimate were primarily due to an increase in estimated service costs. Additionally, increases for the year ended December 31, 2023 due to the acceleration of estimated settlement date.