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Business Segments - Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Operating income (loss)	$ (677,750)	$ (892,258)	$ (461,576)
Credit loss expense	1,500	(5,606)	(5,683)
Interest income	222	1,254	6,013
Interest expense	41,978	40,770	75,204
Other income (expense)	(275)	756	389
Loss before income taxes	(719,781)	(931,018)	(530,378)
Other Operations
Segment Reporting Information [Line Items]
Operating income (loss)	9,905	(41,685)	(54,725)
Contract Drilling | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	423,029	(543,438)	(151,329)
Pressure Pumping | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	118,863	(166,666)	(102,701)
Directional Drilling | Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	35,301	(40,612)	(52,724)
Corporate Segment
Segment Reporting Information [Line Items]
Operating income (loss)	$ (92,152)	$ (94,251)	$ (94,414)

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