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v3.20.1

Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2019
Asset Retirement Obligations [Abstract] |
Summary of Changes in Asset Retirement Obligations |
|  | Year Ended December 31,
(in thousands) |  | 2019 |  | 2018 |  |  | 2017
Beginning balance |  | $ | 14,816 |  | $ | 20,163 |  | $ | 18,612
Accretion |  |  | 812 |  |  | 1,180 |  |  | 951
Additions |  |  | 595 |  |  | — |  |  | —
Acquisitions and dispositions |  |  | — |  |  | — |  |  | (103)
Revisions |  |  | (379) |  |  | (6,527) |  |  | 703
Ending balance |  | $ | 15,844 |  | $ | 14,816 |  | $ | 20,163

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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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