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Business Segments - Assets (Detail) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Asset Reconciling Item [Line Items]
Total assets		$ 3,804,606	$ 4,529,484	$ 5,390,912
Other Operations
Segment Reporting Asset Reconciling Item [Line Items]
Total assets		48,885	38,726	51,313
Corporate
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	[1]	69,272	220,010	153,013
Operating Segments | Contract Drilling
Segment Reporting Asset Reconciling Item [Line Items]
Total assets		3,032,819	3,457,044	4,000,576
Operating Segments | Pressure Pumping
Segment Reporting Asset Reconciling Item [Line Items]
Total assets		$ 653,630	$ 813,704	$ 1,186,010
[1] Corporate assets primarily include cash on hand, income tax receivables and certain deferred tax assets.

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- 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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