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Asset Retirement Obligation (Tables) | 12 Months Ended
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Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract] |
Information Related to Asset Retirement Obligations | The following table reflects information related to our asset retirement obligations:
Balance at December 31, 2018 |  | $ | 222,989 |
Additions to asset retirement obligations |  |  | 2,529 |
Accretion expense |  |  | 4,260 |
Liabilities settled |  |  | (3,641 | )
Balance at December 31, 2019 |  | $ | 226,137 |
Additions to asset retirement obligations |  |  | 658 |
Accretion expense |  |  | 4,135 |
Liabilities settled |  |  | (8,054 | )
Balance at December 31, 2020 |  | $ | 222,876 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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