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Business Segments - Depreciation, Depletion, Amortization and Impairment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]      
Depreciation, depletion, amortization and impairment $ 1,003,873 $ 916,318 $ 783,341
Corporate      
Segment Reporting Information [Line Items]      
Depreciation, depletion, amortization and impairment 6,888 7,872 7,695
Operating Segments | Contract Drilling      
Segment Reporting Information [Line Items]      
Depreciation, depletion, amortization and impairment 668,007 571,607 538,891
Operating Segments | Pressure Pumping      
Segment Reporting Information [Line Items]      
Depreciation, depletion, amortization and impairment 233,952 250,010 198,006
Operating Segments | Directional Drilling      
Segment Reporting Information [Line Items]      
Depreciation, depletion, amortization and impairment 52,223 45,317 9,347
Other Operations      
Segment Reporting Information [Line Items]      
Depreciation, depletion, amortization and impairment $ 42,803 $ 41,512 $ 29,402