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Business Segments - Capital Expenditures (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Capital expenditures	$ 145,481	$ 347,512	$ 641,458
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	1,707	4,612	2,426
Operating Segments | Contract Drilling
Segment Reporting Information [Line Items]
Capital expenditures	105,037	194,416	394,595
Operating Segments | Pressure Pumping
Segment Reporting Information [Line Items]
Capital expenditures	21,678	105,803	173,848
Operating Segments | Directional Drilling
Segment Reporting Information [Line Items]
Capital expenditures	4,681	15,549	35,929
Other Operations
Segment Reporting Information [Line Items]
Capital expenditures	$ 12,378	$ 27,132	$ 34,660

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=121586364&loc=d3e3213-108585

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- Definition

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+ References

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