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Acquisitions - Additional Information (Detail) shares in Thousands			3 Months Ended
	Oct. 11, 2017 USD ($) shares	Apr. 20, 2017 USD ($) Rigs hp shares	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Goodwill			$ 611,473,000		$ 611,473,000
Merger and integration related costs			1,991,000	$ 5,156,000
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
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 modern, efficient fracturing equipment | hp		500,000
Decrease in goodwill due to measurement period adjustments		$ 1,900,000
Goodwill deductible for tax purposes		0
Goodwill		436,554,000
Merger and integration related costs				$ 8,100,000
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 Rental
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	88,685,000
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.

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