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Summary of Significant Accounting Policies - Summary of Lease Cost Recognized (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2020
Operations And Summary Of Significant Accounting Policies [Line Items] |  |
Operating lease cost | $ 7,975 | $ 28,432
General and Administrative Expense |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |
Operating lease cost | 422 | 1,249
Lease Operating Expense |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |
Operating lease cost | 229 | 578
Short-term Drilling Rig Costs Included in Proved Oil and Gas Properties |  |
Operations And Summary Of Significant Accounting Policies [Line Items] |  |
Operating lease cost | $ 7,324 | $ 26,605

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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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