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Property, Plant and Equipment - Narrative (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) $ / Boe | Dec. 31, 2020 USD ($) $ / Boe | Dec. 31, 2019 USD ($) $ / Boe
Property, Plant and Equipment [Line Items] |  |  |
Average depreciation and depletion rate (usd per Boe) | $ / Boe | 0.78 | 5.11 | 12.28
Unproved | $ | $ 12,255 | $ 17,964 | $ 24,603
Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Expect completion of evaluation activities on majority of unproved properties, without existing production (in years) | 3 years |  |
Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Expect completion of evaluation activities on majority of unproved properties, without existing production (in years) | 5 years |  |

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- Definition Anticipated Timing of Inclusion of Costs in Amortization Calculation, Without Existing Production, Period + References No definition available. + Details
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- Definition The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=123726172&loc=d3e511914-122862 + Details
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