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Business Segments - Capital Expenditures (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 119,799 | $ 743,776 | $ 1,052,341
Other Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 6,116 | 16,625 | 36,683
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 1,591 | 2,520 | 2,706
Operating Segments | Contract Drilling |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 72,508 | 527,054 | 771,593
Operating Segments | Pressure Pumping |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 39,584 | $ 197,577 | $ 241,359

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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 -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: 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=66902209&loc=d3e3213-108585 + Details
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