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Business Segments - Assets (Detail) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Asset Reconciling Item [Line Items]
Assets		$ 4,533,317	$ 5,394,011	$ 4,687,127
Operating Segments | Contract Drilling
Segment Reporting Asset Reconciling Item [Line Items]
Assets		3,457,044	4,000,576	3,569,588
Operating Segments | Pressure Pumping
Segment Reporting Asset Reconciling Item [Line Items]
Assets		813,704	1,186,010	761,199
Operating Segments | Oil And Natural Gas
Segment Reporting Asset Reconciling Item [Line Items]
Assets		34,073	50,945	58,656
Corporate and other
Segment Reporting Asset Reconciling Item [Line Items]
Assets	[1]	$ 228,496	$ 156,480	$ 297,684
[1] Corporate and other assets primarily include cash on hand, income tax receivables and certain deferred tax assets.

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.18)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 12
-Article 7

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- Definition

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+ References

No definition available.

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