Business Segments - Revenues (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		$ 579,186	$ 193,907	$ 884,361	$ 462,846
Other Operations
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues	[1]	19,642	4,722	25,260	8,689
Operating Segments | Contract Drilling
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		270,487	115,235	429,542	283,992
Operating Segments | Pressure Pumping
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		290,044	$ 73,950	431,218	170,263
Intersegment Elimination
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues	[2]	$ (987)		$ (1,659)	$ (98)

[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 business.

[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.