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Supplemental Oil and Gas Disclosures - Unaudited - Capitalized Costs Related to Oil and Natural Gas Producing Activities (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Oil and Gas Exploration and Production Industries Disclosures [Abstract] |  |
Proved oil and gas properties | $ 770,117 | $ 8,724,376
Less: Accumulated depreciation, depletion, amortization and impairment | (12,403) | (3,601,019)
Proved oil and gas properties, net | 757,714 | 5,123,357
Unproved oil and gas properties | 40,211 | 738,662
Total oil and gas properties, net | $ 797,925 | $ 5,862,019

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- Definition Oil and Gas properties with proved reserves under the successful effort method, net of accumulated depreciation, depletion, amortization and impairment. + References No definition available. + Details
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- Definition Net amount of capitalized costs relating to oil and gas producing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 + Details
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- Definition Amount of accumulated depreciation, depletion and amortization of oil and gas property carried under the successful effort method. Oil and gas property include, but not limited to, the entity's wells and related equipment and facilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 Reference 2: 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.(b)) -URI http://asc.fasb.org/extlink&oid=120398226&loc=d3e511914-122862 + Details
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- Definition Oil and Gas properties with unproved reserves under the successful effort method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 25 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=96866604&loc=d3e64746-109465 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61926-109447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -URI http://asc.fasb.org/topic&trid=2145477 + Details
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