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Property and Equipment - Additional Information (Detail) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) Rigs | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) Rigs | Sep. 30, 2017 USD ($)
Pressure Pumping |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Impairment charge for the write-down of drilling equipment | $ 17,400,000 | $ 0 |  |
Rigs and Spare Rig Components That Would No Longer Be Marketed |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Number of rigs | Rigs | 42 |  | 42 |
Impairment charge for the write-down of drilling equipment | $ 48,400,000 |  | $ 48,400,000 | $ 29,000,000

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