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Revenue Recognition - Disaggregated Revenue (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 575,732,000 | $ 473,812,000 |
Contract asset | 0 |  | $ 0
Contract liability | 0 |  | $ 0
Exploration and Production |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 517,253,000 | 434,304,000 |
Midstream Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 106,582,000 | 64,562,000 |
Well Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 32,631,000 | 44,888,000 |
Operating Segments | Exploration and Production |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 517,253,000 | 434,304,000 |
Operating Segments | Exploration and Production | Crude oil revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 318,120,000 | 326,310,000 |
Operating Segments | Exploration and Production | Purchased crude oil sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 147,136,000 | 67,660,000 |
Operating Segments | Exploration and Production | Natural gas revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 27,452,000 | 26,962,000 |
Operating Segments | Exploration and Production | Purchased natural gas sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 1,335,000 | 49,000 |
Operating Segments | Exploration and Production | NGL revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 23,210,000 | 13,323,000 |
Operating Segments | Midstream Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 48,021,000 | 27,922,000 |
Operating Segments | Midstream Services | Crude oil and natural gas revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 24,664,000 | 18,029,000 |
Operating Segments | Midstream Services | Produced and flowback water revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 9,033,000 | 8,876,000 |
Operating Segments | Midstream Services | Total midstream service revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 33,697,000 | 26,905,000 |
Operating Segments | Midstream Services | Natural gas and NGL revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 12,797,000 | 0 |
Operating Segments | Midstream Services | Freshwater revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 1,527,000 | 1,017,000 |
Operating Segments | Midstream Services | Total midstream product revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 14,324,000 | 1,017,000 |
Operating Segments | Well Services |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 10,458,000 | 11,586,000 |
Operating Segments | Well Services | Hydraulic fracturing revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 9,775,000 | 10,426,000 |
Operating Segments | Well Services | Equipment rental revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 683,000 | $ 1,160,000 |

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