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Business Segments - Capital Expenditures (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures | $ 143,061 | $ 28,677 | $ 329,851 | $ 80,511
Other Operations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures | 8,647 | 2,401 | 21,016 | 5,621
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures | 305 | 395 | 986 | 1,227
Operating Segments | Contract Drilling |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures | 106,879 | 17,551 | 222,426 | 46,001
Operating Segments | Pressure Pumping |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Capital expenditures | $ 27,230 | $ 8,330 | $ 85,423 | $ 27,662

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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