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Business Segments - Capital Expenditures (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Segment Reporting Information [Line Items] |  |
Capital expenditures | $ 118,341 | $ 122,921
Corporate |  |
Segment Reporting Information [Line Items] |  |
Capital expenditures | 1,331 | 526
Operating Segments | Contract Drilling |  |
Segment Reporting Information [Line Items] |  |
Capital expenditures | 75,725 | 75,247
Operating Segments | Pressure Pumping |  |
Segment Reporting Information [Line Items] |  |
Capital expenditures | 31,400 | 24,923
Operating Segments | Directional Drilling |  |
Segment Reporting Information [Line Items] |  |
Capital expenditures | 2,112 | 12,829
Other Operations |  |
Segment Reporting Information [Line Items] |  |
Capital expenditures | $ 7,773 | $ 9,396

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- 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 + Details
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