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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2020
Asset Retirement Obligations [Abstract] |
Summary of Changes in Asset Retirement Obligations |
|  | Year ended December 31,
(in thousands) |  | 2020 |  | 2019
Beginning balance |  | $ | 15,844 |  | $ | 14,816
Accretion |  |  | 893 |  |  | 812
Additions |  |  | 359 |  |  | 595
Revisions |  |  | 238 |  |  | (379)
Ending balance |  | $ | 17,334 |  | $ | 15,844

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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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