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Business Segments - Capital Expenditures (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Capital expenditures	$ 162,785	$ 143,061	$ 480,568	$ 329,851
Other Operations
Segment Reporting Information [Line Items]
Capital expenditures	6,817	8,647	23,524	21,016
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	958	305	1,711	986
Operating Segments | Contract Drilling
Segment Reporting Information [Line Items]
Capital expenditures	103,295	106,879	299,637	222,426
Operating Segments | Pressure Pumping
Segment Reporting Information [Line Items]
Capital expenditures	44,860	$ 27,230	125,978	$ 85,423
Operating Segments | Directional Drilling
Segment Reporting Information [Line Items]
Capital expenditures	$ 6,855		$ 29,718

X

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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- Definition

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+ References

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