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Acquisitions and Divestitures - Acquisitions (Details) a in Thousands |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 12, 2018 USD ($) | Feb. 14, 2018 USD ($) a shares | Dec. 31, 2020 USD ($) | Dec. 31, 2018 USD ($) | Nov. 19, 2020 USD ($) | Nov. 18, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2017 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill |  |  | $ 70,534,000 |  | $ 70,534,000 | $ 0 | $ 0 |
Permian Basin Acquisition |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acres acquired | a |  | 22 |  |  |  |  |  |
Aggregate cash consideration paid |  | $ 549,770,000 |  |  |  |  |  |
Shares issued as consideration (in shares) | shares |  | 46,000,000 |  |  |  |  |  |
Assets acquired and liabilities assumed |  | $ 920,990,000 |  |  |  |  |  |
Goodwill |  | 0 |  |  |  |  |  |
Deferred tax amounts recognized |  | $ 0 |  |  |  |  |  |
Total revenue of acquiree included in consolidated financial statements |  |  |  | $ 71,700,000 |  |  |  |
Operating loss of acquiree included in consolidated financial statements |  |  |  | $ 15,600,000 |  |  |  |
Other Delaware Acquisition |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Aggregate cash consideration paid | $ 59,500,000 |  |  |  |  |  |  |
Goodwill | 0 |  |  |  |  |  |  |
Estimated fair value of assets acquired and liabilities assumed | $ 59,500,000 |  |  |  |  |  |  |
Forge Energy | Permian Basin Acquisition |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Security deposit |  |  |  |  |  |  |  | $ 47,300,000
Several Acreage and Producing Assets |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisitions of oil and gas properties |  |  | $ 0 |  |  |  |  |

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