The following table summarizes changes in the Company’s asset retirement obligations (“ARO”) associated with its working interests in oil and gas properties for the six months ended June 30, 2026:


(in thousands)
Asset retirement obligations, beginning of period	$	189,350
Liabilities incurred	7,343
Liabilities acquired	1,320
Liabilities divested and settled	(3,040)
Accretion expense	6,412

Asset retirement obligations, end of period	201,385
Less current portion(1)	(25,776)
Asset retirement obligations - long-term, end of period	$	175,609

ARO reflect the present value of the estimated future costs associated with the plugging and abandonment of oil and gas wells, removal of equipment and facilities from leased acreage and land restoration in accordance with applicable local, state and federal laws. Inherent in the fair value calculation of ARO are numerous estimates and assumptions, including plug and abandonment settlement amounts, inflation factors, credit adjusted discount rates and the timing of settlement. To the extent future revisions to these assumptions impact the value of the existing ARO liabilities, a corresponding offsetting adjustment is made to the oil and gas property balance. Changes in the liability due to the passage of time are recognized as an increase in the carrying amount of the liability with an offsetting charge to accretion expense, which is included within depreciation, depletion and amortization.