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Asset Retirement Obligations
 12 Months Ended
Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations Asset Retirement Obligations
Our ARO liabilities are based on our net ownership in wells and facilities and management’s estimate of the costs to abandon and remediate those wells and facilities together with management’s estimate of the future timing of the costs to be incurred. The following table summarizes activity related to our ARO liabilities for the years ended December 31, 2024 and 2023:

Year Ended December 31,
20242023
(in thousands)
Balance at beginning of period
$445,060 $365,614 
Additions(1)
43,784 34,460 
Retirements(13,399)(10,046)
Accretion expense31,527 27,782 
Revisions35,230 29,002 
Sale(56,034)(1,752)
Balance at end of period486,168 445,060 
Less: current portion(37,223)(26,741)
Balance at end of period, noncurrent portion$448,945 $418,319 
(1)During the year ended December 31, 2024, our ARO additions primarily related to oil and natural gas properties acquired in the SilverBow Merger and the Central Eagle Ford Acquisition. During the year ended December 31, 2023, our ARO additions primarily related to properties acquired in the Western Eagle Ford Acquisitions. See NOTE 3 – Acquisitions and Divestitures for additional information.