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Disaggregation of oil, gas, and NGL production revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 282,012 | $ 389,419 | $ 806,035 | $ 1,136,749
Revenue, Remaining Performance Obligation, Amount | 0 |  | 0 |
Oil production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 207,647 | 292,857 | 618,856 | 836,062
Gas production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 49,555 | 64,047 | 125,128 | 194,384
NGL production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 24,810 | 32,515 | 62,051 | 106,303
Midland Basin [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 217,966 | 295,265 | 631,818 | 840,978
Midland Basin [Member] | Oil production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 194,547 | 277,361 | 585,041 | 791,055
Midland Basin [Member] | Gas production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 23,304 | 17,780 | 46,559 | 49,821
Midland Basin [Member] | NGL production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 115 | 124 | 218 | 102
South Texas [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 64,046 | 94,154 | 174,217 | 295,771
South Texas [Member] | Oil production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 13,100 | 15,496 | 33,815 | 45,007
South Texas [Member] | Gas production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 26,251 | 46,267 | 78,569 | 144,563
South Texas [Member] | NGL production revenue [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 24,695 | $ 32,391 | $ 61,833 | $ 106,201
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Relative percentage | 100.00% | 100.00% | 100.00% | 100.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | Midland Basin [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Relative percentage | 77.00% | 76.00% | 78.00% | 74.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | South Texas [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Relative percentage | 23.00% | 24.00% | 22.00% | 26.00%

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