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Revenue Recognition (Tables) | 9 Months Ended
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Sep. 30, 2019
Disaggregation of Revenue [Line Items] |
Remaining Performance Obligation Expected Satisfaction Period | The following table presents estimated revenue allocated to remaining performance obligations for contracted revenues that are unsatisfied (or partially satisfied) as of September 30, 2019:
| (In thousands)
2019 (excluding the nine months ended September 30, 2019) | $ | 3,003 |
2020 | 20,501 |
2021 | 25,082 |
2022 | 19,259 |
2023 | 12,642 |
Thereafter | 14,642 |
Total | $ | 95,129 |
Exploration and Production Revenues |
Disaggregation of Revenue [Line Items] |
Disaggregation of Revenue | Revenues associated with contracts with customers for crude oil, natural gas and natural gas liquids (“NGL”) sales were as follows for the three and nine months ended September 30, 2019 and 2018:
Exploration and Production Revenues |  |  |  |  |  |  |
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2019 |  | 2018 |  | 2019 |  | 2018
| (In thousands) |  |  |  |  |  |
Crude oil revenues | $ | 318,564 |  |  | $ | 414,082 |  |  | $ | 964,662 |  |  | $ | 1,103,575 |
Purchased crude oil sales | 77,018 |  |  | 169,531 |  |  | 330,594 |  |  | 364,404 |
Natural gas and NGL revenues | 25,906 |  |  | 40,113 |  |  | 105,594 |  |  | 115,064 |
Purchased natural gas sales | 2,334 |  |  | 1,616 |  |  | 6,590 |  |  | 2,161 |
Total exploration and production revenues | $ | 423,822 |  |  | $ | 625,342 |  |  | $ | 1,407,440 |  |  | $ | 1,585,204 |
Midstream Services |
Disaggregation of Revenue [Line Items] |
Disaggregation of Revenue | Revenues associated with contracts with customers for midstream services under fee-based arrangements and midstream product sales from purchase arrangements were as follows for the three and nine months ended September 30, 2019 and 2018:
Midstream Revenues(1) |  |  |  |  |  |  |
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2019 |  | 2018 |  | 2019 |  | 2018
| (In thousands) |  |  |  |  |  |
Midstream service revenues |  |  |  |  |  |  |
Crude oil and natural gas revenues | $ | 21,653 |  |  | $ | 18,188 |  |  | $ | 69,189 |  |  | $ | 54,124 |
Produced and flowback water revenues | 10,803 |  |  | 9,985 |  |  | 29,309 |  |  | 27,919 |
Total midstream service revenues | $ | 32,456 |  |  | $ | 28,173 |  |  | $ | 98,498 |  |  | $ | 82,043 |
Midstream product revenues |  |  |  |  |  |  |
Purchased crude oil sales | $ | — |  |  | $ | 1,838 |  |  | $ | 28 |  |  | $ | 2,193 |
Natural gas and NGL revenues | 16,424 |  |  | — |  |  | 46,541 |  |  | — |
Freshwater revenues | 1,143 |  |  | 3,014 |  |  | 4,578 |  |  | 6,408 |
Total midstream product revenues | $ | 17,567 |  |  | $ | 4,852 |  |  | $ | 51,147 |  |  | $ | 8,601 |
Total midstream revenues | $ | 50,023 |  |  | $ | 33,025 |  |  | $ | 149,645 |  |  | $ | 90,644 |
__________________ (1)Represents midstream revenues, excluding all intercompany revenues for work performed by the midstream services business segment for the Company’s ownership interests that are eliminated in consolidation and are therefore not included in consolidated midstream services revenues.
Well Services |
Disaggregation of Revenue [Line Items] |
Disaggregation of Revenue | Revenues associated with contracts with customers for well services were as follows for the three and nine months ended September 30, 2019 and 2018:
Well Services Revenues(1) |  |  |  |  |  |  |
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2019 |  | 2018 |  | 2019 |  | 2018
| (In thousands) |  |  |  |  |  |
Hydraulic fracturing revenues | $ | 8,228 |  |  | $ | 14,985 |  |  | $ | 28,631 |  |  | $ | 42,801 |
Equipment rental revenues | 670 |  |  | 1,277 |  |  | 2,164 |  |  | 3,543 |
Total well services revenues | $ | 8,898 |  |  | $ | 16,262 |  |  | $ | 30,795 |  |  | $ | 46,344 |
__________________ (1)Represents well services revenues, excluding all intercompany revenues for work performed by the well services business segment for the Company’s ownership interests that are eliminated in consolidation and are therefore not included in consolidated well services revenues.

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