Business Segments - Revenues (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		$ 684,989	$ 206,133	$ 1,569,350	$ 668,979
Other Operations
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues	[1]	22,832	4,284	48,092	12,973
Operating Segments | Contract Drilling
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		301,954	123,863	731,496	407,855
Operating Segments | Pressure Pumping
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		362,441	78,165	793,659	248,428
Intersegment Elimination
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues	[2]	$ (2,238)	$ (179)	$ (3,897)	$ (277)

[1] Other operations includes the Company’s oilfield rental tools business, pipe handling components and related technology business, the oil and natural gas working interests and the Middle East/North Africa activities.

[2] For 2016, intercompany revenues consists of contract drilling intercompany revenues for services provided to other operations. For 2017, intercompany revenues also includes revenues from other operations for services provided to contract drilling, pressure pumping and within other operations.