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Acquisitions - Additional Information (Detail) shares in Thousands |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Oct. 11, 2017 USD ($) shares | Apr. 20, 2017 USD ($) Rigs hp shares | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Dec. 31, 2017 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | $ 612,473,000 |  | $ 611,473,000
Merger and integration related costs |  |  | $ 9,449,000 | 2,738,000 | $ 65,798,000 |
Contract Drilling |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | 395,060,000 |  | 395,060,000
Pressure Pumping |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | 121,444,000 |  | 121,444,000
Oilfield Rentals |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | 6,284,000 |  | 6,284,000
Directional Drilling |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | $ 89,685,000 |  | $ 88,685,000
Seventy Seven Energy Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Shares of common stock exchange in business acquisition | shares |  | 46,298 |  |  |  |
Repayment of outstanding debt |  | $ 472,000,000 |  |  |  |
Merger date |  |  |  | Apr. 20, 2017 |  |
Total fair value of the consideration transferred |  | $ 1,511,396,000 |  |  |  |
Number of drilling rigs acquired | Rigs |  | 91 |  |  |  |
Number of horsepower of fracturing equipment | hp |  | 500,000 |  |  |  |
Goodwill deductible for tax purposes |  | $ 0 |  |  |  |
Goodwill |  | 436,554,000 |  |  |  |
Merger and integration related costs |  |  |  |  | $ 36,700,000 |
Seventy Seven Energy Inc. | Contract Drilling |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | 309,000,000 |  |  |  |
Seventy Seven Energy Inc. | Pressure Pumping |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | 121,000,000 |  |  |  |
Seventy Seven Energy Inc. | Oilfield Rentals |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 6,300,000 |  |  |  |
Seventy Seven Energy Inc. | APEX Class Rigs |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of rigs | Rigs |  | 36 |  |  |  |
MS Directional |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Shares of common stock exchange in business acquisition | shares | 8,798 |  |  |  |  |
Repayment of outstanding debt | $ 63,000,000 |  |  |  |  |
Merger date |  |  |  | Oct. 11, 2017 |  |
Total fair value of the consideration transferred | 257,275,000 |  |  |  |  |
Goodwill | 89,685,000 |  |  |  |  |
Aggregate consideration to be paid by the company | 69,800,000 |  |  |  |  |
Business acquisition, description of acquired entity |  |  |  | MS Directional is a leading directional drilling services company in the United States, with operations in most major producing onshore oil and gas basins. MS Directional provides a comprehensive suite of directional drilling services, including directional drilling, downhole performance motors, directional surveying, measurement while drilling, and wireline steering tools. |  |
Increase in goodwill due to measurement period adjustments | 1,000,000 |  |  |  |  |
MS Directional | Directional Drilling |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 89,685,000,000 |  |  |  |  |

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