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Asset Retirement Obligations (Tables)
9 Months Ended
Sep. 30, 2021
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligation
NOTE 10 - ASSET RETIREMENT OBLIGATIONS

The following table presents the changes in carrying amounts of the asset retirement obligations associated with our working interests in crude oil and natural gas properties for the nine months ended September 30, 2021:
(in thousands)
Asset retirement obligations at beginning of period$166,570 
Obligations incurred with development activities and other4,069 
Accretion expense9,185 
Revisions in estimated cash flows(783)
Obligations discharged with asset retirements and divestitures(26,805)
Asset retirement obligations at end of period152,236 
Current portion (1)
(33,875)
Long-term portion$118,361 
_____________
(1) The current portion of the asset retirement obligation is included in other accrued expenses on our condensed consolidated balance sheets.