XML 43 R32.htm IDEA: XBRL DOCUMENT
v3.21.2

Asset Retirement Obligations (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2021
Asset Retirement Obligations [Abstract] |
Summary of Changes in Asset Retirement Obligations |
(in thousands) |  | As of June 30, 2021 |  | As of December 31, 2020
Beginning balance |  | $ | 17,334 |  | $ | 15,844
Accretion |  |  | 735 |  |  | 893
Additions |  |  | 14,564 |  |  | 359
Revisions |  |  | — |  |  | 238
Ending balance |  | $ | 32,633 |  | $ | 17,334

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration