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Revenue Recognition - Disaggregated Revenue (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | $ 482,743,000 | $ 674,629,000 | $ 1,587,880,000 | $ 1,722,192,000 |
Contract asset | 0 |  | 0 |  | $ 0
Contract liability | 0 |  | 0 |  | $ 0
Exploration and Production Revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 423,822,000 | 625,342,000 | 1,407,440,000 | 1,585,204,000 |
Midstream Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 123,411,000 | 75,770,000 | 349,438,000 | 209,739,000 |
Well Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 30,409,000 | 56,439,000 | 102,321,000 | 161,242,000 |
Operating Segments | Exploration and Production Revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 423,822,000 | 625,342,000 | 1,407,440,000 | 1,585,204,000 |
Operating Segments | Exploration and Production Revenues | Crude oil revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 318,564,000 | 414,082,000 | 964,662,000 | 1,103,575,000 |
Operating Segments | Exploration and Production Revenues | Purchased crude oil sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 77,018,000 | 169,531,000 | 330,594,000 | 364,404,000 |
Operating Segments | Exploration and Production Revenues | Natural gas and NGL revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 25,906,000 | 40,113,000 | 105,594,000 | 115,064,000 |
Operating Segments | Exploration and Production Revenues | Purchased natural gas sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 2,334,000 | 1,616,000 | 6,590,000 | 2,161,000 |
Operating Segments | Midstream Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 50,023,000 | 33,025,000 | 149,645,000 | 90,644,000 |
Operating Segments | Midstream Services | Purchased crude oil sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 0 | 1,838,000 | 28,000 | 2,193,000 |
Operating Segments | Midstream Services | Crude oil and natural gas revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 21,653,000 | 18,188,000 | 69,189,000 | 54,124,000 |
Operating Segments | Midstream Services | Produced and flowback water revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 10,803,000 | 9,985,000 | 29,309,000 | 27,919,000 |
Operating Segments | Midstream Services | Total midstream service revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 32,456,000 | 28,173,000 | 98,498,000 | 82,043,000 |
Operating Segments | Midstream Services | Natural gas and NGL revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 16,424,000 | 0 | 46,541,000 | 0 |
Operating Segments | Midstream Services | Freshwater revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 1,143,000 | 3,014,000 | 4,578,000 | 6,408,000 |
Operating Segments | Midstream Services | Total midstream product revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 17,567,000 | 4,852,000 | 51,147,000 | 8,601,000 |
Operating Segments | Well Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 8,898,000 | 16,262,000 | 30,795,000 | 46,344,000 |
Operating Segments | Well Services | Hydraulic fracturing revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | 8,228,000 | 14,985,000 | 28,631,000 | 42,801,000 |
Operating Segments | Well Services | Equipment rental revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues | $ 670,000 | $ 1,277,000 | $ 2,164,000 | $ 3,543,000 |

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