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Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 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 March 31, 2019:
| (In thousands)
2019 (excluding the three months ended March 31, 2019) | $ | 20,430 |
2020 | 26,905 |
2021 | 25,656 |
2022 | 19,263 |
2023 | 12,642 |
Thereafter | 14,642 |
Total | $ | 119,538 |
Exploration and Production |
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 months ended March 31, 2019 and 2018:
Exploration and Production Revenues
| Three Months Ended March 31,
| 2019 |  | 2018
| (In thousands)
Crude oil revenues | $ | 318,120 |  |  | $ | 326,310 |
Purchased crude oil sales | 147,136 |  |  | 67,660 |
Natural gas revenues | 27,452 |  |  | 26,962 |
Purchased natural gas sales | 1,335 |  |  | 49 |
NGL revenues | 23,210 |  |  | 13,323 |
Total exploration and production revenues | $ | 517,253 |  |  | $ | 434,304 |
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 months ended March 31, 2019 and 2018:
Midstream Revenues(1)
| Three Months Ended March 31,
| 2019 |  | 2018
| (In thousands)
Midstream service revenues |  |  |
Crude oil and natural gas revenues | $ | 24,664 |  |  | $ | 18,029 |
Produced and flowback water revenues | 9,033 |  |  | 8,876 |
Total midstream service revenues | $ | 33,697 |  |  | $ | 26,905 |
Midstream product revenues |  |  |
Natural gas and NGL revenues | $ | 12,797 |  |  | $ | — |
Freshwater revenues | 1,527 |  |  | 1,017 |
Total midstream product revenues | $ | 14,324 |  |  | $ | 1,017 |
Total midstream revenues | $ | 48,021 |  |  | $ | 27,922 |
__________________
(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 months ended March 31, 2019 and 2018:
Well Services Revenues(1)
| Three Months Ended March 31,
| 2019 |  | 2018
| (In thousands)
Hydraulic fracturing revenues | $ | 9,775 |  |  | $ | 10,426 |
Equipment rental revenues | 683 |  |  | 1,160 |
Total well services revenues | $ | 10,458 |  |  | $ | 11,586 |
__________________
(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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