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Business Segments - Depreciation, Amortization and Impairment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, depletion, amortization and impairment | $ 219,328 | $ 170,975 | $ 375,545 | $ 347,745
Other Operations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, depletion, amortization and impairment | 8,120 | 1,805 | 10,292 | 6,537
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, depletion, amortization and impairment | 1,989 | 1,368 | 3,225 | 2,737
Operating Segments | Contract Drilling |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, depletion, amortization and impairment | 161,414 | 120,402 | 271,973 | 241,501
Operating Segments | Pressure Pumping |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, depletion, amortization and impairment | $ 47,805 | $ 47,400 | $ 90,055 | $ 96,970

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