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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2023
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligations | The following table shows the change in our AROs (dollars in thousands):
| 2023 |  | 2022
Asset retirement obligations at the beginning of year | $ | 797,762 |  |  | $ | 767,382 |
Changes attributable to: |  |  |
Accretion expense | 44,269 |  |  | 41,240 |
Settlements | (14,039) |  |  | (10,860) |
Estimated cash flow revisions | 135,323 |  |  | — |
Newly incurred obligation | 2,686 |  |  | — |
Asset retirement obligations at the end of year | $ | 966,001 |  |  | $ | 797,762 |

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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 -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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