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Asset Retirement Obligations | 9 Months Ended
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Sep. 30, 2019
Asset Retirement Obligations [Abstract] |
Asset Retirement Obligations | 13. ASSET RETIREMENT OBLIGATIONS The following table summarizes the changes in the Company’s asset retirement obligations:
(in thousands) |  | Nine Months Ended September 30, 2019 |  | Year Ended December 31, 2018
Beginning balance |  | $ | 14,816 |  | $ | 20,163
Accretion |  |  | 601 |  |  | 1,180
Additions |  |  | 292 |  |  | —
Revisions |  |  | — |  |  | (6,527)
Ending balance |  | $ | 15,709 |  | $ | 14,816
Accretion is recorded in the line item “Depreciation, depletion and amortization” on the Company’s condensed consolidated statements of operations. The Company is required under the Etame PSC to conduct regular abandonment studies to update the estimated costs to abandon the offshore wells, platforms and facilities on the Etame Marin block. In 2018, the Company recorded a downward revision of $6.5 million to the ARO liability as a result of a change in the expected timing of the abandonment costs when the period of exploitation under the Etame PSC was extended to at least September 16, 2028 as discussed further in Note 7. The most recently completed abandonment study was in November 2018. In September 2019, the Company recorded $0.3 million in additions associated with the spudding of the Etame 9P appraisal wellbore at the Etame field in conjunction with commencement of its 2019/2020 drilling campaign.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2175671 + Details
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