Business Segments - Revenues (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		$ 305,175	$ 268,939
Other Operations
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues	[1]	5,618	3,967
Operating Segments | Contract Drilling
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		159,055	168,757
Operating Segments | Pressure Pumping
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		141,174	96,313
Intersegment Elimination
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues	[2]	$ (672)	$ (98)

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

[2] Consists of contract drilling intercompany revenues for services provided to the oil and natural gas exploration and production segment. In 2017, intercompany revenues also includes revenues between the pipe handling component manufacturer and the pipe handling component service provider.