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Business Segments - Depreciation, Depletion, Amortization and Impairment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Depreciation, depletion, amortization and impairment	$ 186,797	$ 214,410
Corporate
Segment Reporting Information [Line Items]
Depreciation, depletion, amortization and impairment	2,008	1,803
Operating Segments | Contract Drilling
Segment Reporting Information [Line Items]
Depreciation, depletion, amortization and impairment	111,438	130,317
Operating Segments | Pressure Pumping
Segment Reporting Information [Line Items]
Depreciation, depletion, amortization and impairment	42,671	60,135
Operating Segments | Directional Drilling
Segment Reporting Information [Line Items]
Depreciation, depletion, amortization and impairment	10,421	10,367
Other Operations
Segment Reporting Information [Line Items]
Depreciation, depletion, amortization and impairment	$ 20,259	$ 11,788

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