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Business Segments - Depreciation, Depletion, Amortization and Impairment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment $ 173,085 $ 208,688 $ 359,882 $ 423,098
Corporate        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment 1,491 1,774 3,499 3,577
Operating Segments | Contract Drilling        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment 115,130 128,402 226,568 258,719
Operating Segments | Pressure Pumping        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment 38,811 56,185 81,482 116,320
Operating Segments | Directional Drilling        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment 9,677 10,870 20,098 21,237
Other Operations        
Segment Reporting Information [Line Items]        
Depreciation, depletion, amortization and impairment $ 7,976 $ 11,457 $ 28,235 $ 23,245