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Asset Retirement Obligations (Tables) | 9 Months Ended
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Sep. 30, 2022
Asset Retirement Obligations |
Summary of Changes in Asset Retirement Obligations | The following table presents the changes in the asset retirement obligations for the nine months ended September 30, 2022 (in thousands): ​
​ | ​ | ​ | ​
Asset retirement obligations at beginning of period | ​ | $ | 103,414
Liabilities added from acquisition or drilling | ​ |  | 20
Liabilities settled | ​ |  | (552)
Liabilities removed upon sale of wells | ​ |  | —
Accretion expense | ​ |  | 5,242
Revision of estimates | ​ |  | 117
Asset retirement obligation at end of period | ​ |  | 108,241
Less: Current portion | ​ |  | 883
Asset retirement obligations - long-term portion | ​ | $ | 107,358

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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