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Business Segment Information - Summarized Financial Information of Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 182,067 | $ 197,235 | $ 230,046 | $ 180,387 | $ 299,672 | $ 368,659 | $ 372,378 | $ 349,519 | $ 789,735 | $ 1,390,228 | $ 1,141,999
Operating income (loss) | (53,166) | $ (19,926) | $ (7,437) | $ (33,635) | 15,924 | $ 134,103 | $ 166,545 | $ 329,080 | (114,164) | 645,652 | 504,398
Other income (expense) |  |  |  |  |  |  |  |  | 57,793 | 168,816 | (141,381)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (56,371) | 814,468 | 363,017
Total assets | 5,649,375 |  |  |  | 5,909,076 |  |  |  | 5,649,375 | 5,909,076 | 4,678,041
Capital expenditures |  |  |  |  |  |  |  |  | 609,999 | 1,572,593 | 2,506,298
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 485,322 | 412,334 | 307,055
Impairment of oil and gas properties |  |  |  |  |  |  |  |  | 46,109 | 47,238 | 1,168
Exploration and Production |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 721,672 | 1,304,004 | 1,084,412
Well Services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 221,478 | 267,384 | 180,686
Midstream Services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 104,695 | 50,958 | 29,230
Operating segments | Exploration and Production |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 721,672 | 1,304,004 | 1,084,412
Operating income (loss) |  |  |  |  |  |  |  |  | (177,512) | 610,850 | 473,178
Other income (expense) |  |  |  |  |  |  |  |  | 58,542 | 168,741 | (141,397)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (118,970) | 779,591 | 331,781
Total assets | 5,478,439 |  |  |  | 5,772,959 |  |  |  | 5,478,439 | 5,772,959 | 4,558,257
Capital expenditures |  |  |  |  |  |  |  |  | 537,806 | 1,525,168 | 2,514,737
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 479,693 | 406,960 | 304,388
Impairment of oil and gas properties |  |  |  |  |  |  |  |  | 46,109 | 47,238 |
Operating segments | Well Services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 44,294 | 74,610 | 51,845
Operating income (loss) |  |  |  |  |  |  |  |  | 49,145 | 70,878 | 56,322
Other income (expense) |  |  |  |  |  |  |  |  | 52 | 75 | 16
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 49,197 | 70,953 | 56,338
Total assets | 470,614 |  |  |  | 281,844 |  |  |  | 470,614 | 281,844 | 78,359
Capital expenditures |  |  |  |  |  |  |  |  | 21,711 | 37,292 | 15,217
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 19,073 | 14,080 | 7,150
Operating segments | Midstream Services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 23,769 | 11,614 | 5,742
Operating income (loss) |  |  |  |  |  |  |  |  | 60,668 | 22,730 | 17,509
Other income (expense) |  |  |  |  |  |  |  |  | (801) | 0 | 0
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 59,867 | 22,730 | 17,509
Total assets | 409,635 |  |  |  | 212,685 |  |  |  | 409,635 | 212,685 | 117,641
Capital expenditures |  |  |  |  |  |  |  |  | 96,947 | 68,939 | 18,955
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | 5,764 | 3,744 | 2,780
Inter-segment | Exploration and Production |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 0 | 0 | 0
Inter-segment | Well Services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 177,184 | 192,774 | 128,841
Inter-segment | Midstream Services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 80,926 | 39,344 | 23,488
Eliminations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | (258,110) | (232,118) | (152,329)
Operating income (loss) |  |  |  |  |  |  |  |  | (46,465) | (58,806) | (42,611)
Other income (expense) |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (46,465) | (58,806) | (42,611)
Total assets | $ (709,313) |  |  |  | $ (358,412) |  |  |  | (709,313) | (358,412) | (76,216)
Capital expenditures |  |  |  |  |  |  |  |  | (46,465) | (58,806) | (42,611)
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  | $ (19,208) | $ (12,450) | $ (7,263)

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