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Business Segments - Revenues (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | $ 193,907 | $ 472,761 | $ 462,846 | $ 1,130,460
Operating Segments |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | 193,907 | 473,028 | 462,944 | 1,131,490
Operating Segments | Contract Drilling |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | 115,235 | 288,588 | 283,992 | 690,829
Operating Segments | Pressure Pumping |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | 73,950 | 176,624 | 170,263 | 426,345
Operating Segments | Oil and Natural Gas |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | $ 4,722 | 7,816 | 8,689 | 14,316
Intersegment Elimination |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues | [1] |  | $ (267) | $ (98) | $ (1,030)
[1] | Consists of contract drilling intercompany revenues for services provided to the oil and natural gas exploration and production segment.

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