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Business Segments - Capital Expenditures (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Capital expenditures	$ 641,458	$ 567,087	$ 119,799
Other Operations
Segment Reporting Information [Line Items]
Capital expenditures	34,660	31,547	6,116
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	2,426	1,884	1,591
Operating Segments | Contract Drilling
Segment Reporting Information [Line Items]
Capital expenditures	394,595	354,425	72,508
Operating Segments | Pressure Pumping
Segment Reporting Information [Line Items]
Capital expenditures	173,848	171,436	$ 39,584
Operating Segments | Directional Drilling
Segment Reporting Information [Line Items]
Capital expenditures	$ 35,929	$ 7,795

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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