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Business Segments - Assets (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Segment Reporting Asset Reconciling Item [Line Items]
Total assets		$ 4,211,471	$ 4,529,484
Operating Segments | Contract Drilling
Segment Reporting Asset Reconciling Item [Line Items]
Total assets		3,201,494	3,457,044
Operating Segments | Pressure Pumping
Segment Reporting Asset Reconciling Item [Line Items]
Total assets		703,768	813,704
Operating Segments | Oil and Natural Gas
Segment Reporting Asset Reconciling Item [Line Items]
Total assets		30,903	34,073
Corporate and other
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	[1]	$ 275,306	$ 224,663
[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 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

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+ References

No definition available.

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