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Property, Plant and Equipment - Narrative (Details) $ in Thousands	12 Months Ended
	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	5.11	12.28
Unproved | $	$ 17,964	$ 24,603
Expected completion of evaluation activities on majority of unproved properties (in years)	10 years
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

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- Definition

Average depreciation and depletion rate on oil and gas properties.

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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=120398226&loc=d3e511914-122862

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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