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Business Segment Information - Summarized Financial Information of Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | $ 482,743 | $ 674,629 | $ 1,587,880 | $ 1,722,192 |
Operating income (loss) | 8,441 | 179,045 | 130,457 | 49,356 |
Other income (expense), net | 4,498 | (88,040) | (165,785) | (371,113) |
Income (loss) before income taxes | 12,939 | 91,005 | (35,328) | (321,757) |
General and administrative | 52,860 | 34,859 | 118,245 | 91,029 |
Equity-based compensation | 8,446 | 7,456 | 26,370 | 21,586 |
Property, plant and equipment, net | 7,089,610 |  | 7,089,610 |  | $ 7,027,109
Total assets | 7,666,977 |  | 7,666,977 |  | 7,626,142
Exploration and Production Revenues |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 423,822 | 625,342 | 1,407,440 | 1,585,204 |
Midstream Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 123,411 | 75,770 | 349,438 | 209,739 |
Well Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 30,409 | 56,439 | 102,321 | 161,242 |
Operating Segments | Exploration and Production Revenues |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 423,822 | 625,342 | 1,407,440 | 1,585,204 |
Operating income (loss) | (51,476) | 146,969 | (30,657) | (53,159) |
Other income (expense), net | 8,871 | (87,594) | (153,481) | (370,311) |
Income (loss) before income taxes | (42,605) | 59,375 | (184,138) | (423,470) |
General and administrative | 46,377 | 30,454 | 99,665 | 77,425 |
Equity-based compensation | 8,246 | 7,102 | 25,348 | 20,565 |
Property, plant and equipment, net | 6,236,331 |  | 6,236,331 |  | 6,311,566
Total assets | 6,736,948 |  | 6,736,948 |  | 6,838,987
Operating Segments | Midstream Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 50,023 | 33,025 | 149,645 | 90,644 |
Operating income (loss) | 64,299 | 31,326 | 169,321 | 101,457 |
Other income (expense), net | (4,512) | (367) | (12,460) | (703) |
Income (loss) before income taxes | 59,787 | 30,959 | 156,861 | 100,754 |
General and administrative | 7,842 | 5,614 | 24,683 | 18,107 |
Equity-based compensation | 383 | 442 | 1,363 | 1,222 |
Property, plant and equipment, net | 1,052,558 |  | 1,052,558 |  | 893,285
Total assets | 1,088,728 |  | 1,088,728 |  | 920,619
Operating Segments | Well Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 8,898 | 16,262 | 30,795 | 46,344 |
Operating income (loss) | 236 | 9,237 | 2,538 | 25,415 |
Other income (expense), net | 139 | (79) | 156 | (99) |
Income (loss) before income taxes | 375 | 9,158 | 2,694 | 25,316 |
General and administrative | 6,489 | 5,437 | 20,038 | 17,084 |
Equity-based compensation | 42 | 354 | 1,130 | 1,149 |
Property, plant and equipment, net | 27,712 |  | 27,712 |  | 38,871
Total assets | 33,292 |  | 33,292 |  | 48,150
Inter-segment | Exploration and Production Revenues |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 0 | 0 | 0 | 0 |
Inter-segment | Midstream Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 73,388 | 42,745 | 199,793 | 119,095 |
Inter-segment | Well Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | 21,511 | 40,177 | 71,526 | 114,898 |
Eliminations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total revenues | (94,899) | (82,922) | (271,319) | (233,993) |
Operating income (loss) | (4,618) | (8,487) | (10,745) | (24,357) |
Other income (expense), net | 0 | 0 | 0 | 0 |
Income (loss) before income taxes | (4,618) | (8,487) | (10,745) | (24,357) |
General and administrative | (7,848) | (6,646) | (26,141) | (21,587) |
Equity-based compensation | (225) | $ (442) | (1,471) | $ (1,350) |
Property, plant and equipment, net | (226,991) |  | (226,991) |  | (216,613)
Total assets | $ (191,991) |  | $ (191,991) |  | $ (181,614)

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