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Business Segments - Revenues (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | $ 206,133 | $ 422,251 | $ 668,979 | $ 1,552,711
Operating Segments |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | 206,312 | 422,630 | 669,256 | 1,554,120
Operating Segments | Contract Drilling |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | 123,863 | 262,196 | 407,855 | 953,025
Operating Segments | Pressure Pumping |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | 78,165 | 154,407 | 248,428 | 580,752
Operating Segments | Oil and Natural Gas |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues |  | 4,284 | 6,027 | 12,973 | 20,343
Intersegment Elimination |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |
Total revenues | [1] | $ (179) | $ (379) | $ (277) | $ (1,409)
[1] | Consists of contract drilling intercompany revenues for services provided to the oil and natural gas exploration and production segment.

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