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Business Segments - Depreciation, Amortization and Improvement (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | $ 668,434 | $ 864,759 | $ 718,730
Other Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | 10,114 | 26,301 | 42,576
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | 5,474 | 5,472 | 4,536
Operating Segments | Contract Drilling |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | 467,974 | 618,434 | 524,023
Operating Segments | Pressure Pumping |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation, depletion, amortization and impairment | $ 184,872 | $ 214,552 | $ 147,595

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