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Business Segments - Revenues (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		$ 206,133	$ 422,251	$ 668,979	$ 1,552,711
Operating Segments
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		206,312	422,630	669,256	1,554,120
Operating Segments | Contract Drilling
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		123,863	262,196	407,855	953,025
Operating Segments | Pressure Pumping
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		78,165	154,407	248,428	580,752
Operating Segments | Oil and Natural Gas
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues		4,284	6,027	12,973	20,343
Intersegment Elimination
Segment Reporting Revenue Reconciling Item [Line Items]
Total revenues	[1]	$ (179)	$ (379)	$ (277)	$ (1,409)
[1] Consists of contract drilling intercompany revenues for services provided to the oil and natural gas exploration and production segment.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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+ References

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