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Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 393,060 | $ 166,352 | $ 748,519 | $ 554,150
E&P |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 328,987 | 121,826 | 611,685 | 453,213
E&P | Crude oil revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 206,729 | 81,059 | 392,547 | 293,852
E&P | Purchased crude oil sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 73,505 | 23,519 | 110,222 | 109,276
E&P | Natural gas and NGL revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 48,498 | 12,771 | 108,141 | 39,106
E&P | Purchased natural gas sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 60 | 4,081 | 354 | 4,602
E&P | Other services revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 195 | 396 | 421 | 6,377
Midstream Total |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 64,073 | 44,526 | 136,834 | 100,937
Midstream Total | Purchased crude oil sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 8,290 | 9,752 | 19,739 | 9,752
Midstream Total | Crude oil, natural gas and NGL revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 20,794 | 22,898 | 43,019 | 49,584
Midstream Total | Produced and flowback water revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 7,466 | 7,247 | 14,874 | 18,499
Midstream Total | Total midstream service revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 28,260 | 30,145 | 57,893 | 68,083
Midstream Total | Crude oil, natural gas and NGL revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 26,782 | 4,335 | 57,965 | 20,608
Midstream Total | Freshwater revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 741 | 294 | 1,237 | 2,494
Midstream Total | Total midstream product revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | $ 35,813 | $ 14,381 | $ 78,941 | $ 32,854

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