Business Segments - Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	$ 36,762	$ (109,410)	$ 17,881	$ (226,937)
Interest income	14	20	29	159
Interest expense	(10,658)	(10,704)	(21,223)	(20,713)
Other	(2,452)	812	(870)	826
Income (loss) before income taxes	23,666	(119,282)	(4,183)	(246,665)
Corporate Segment
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	(12,377)	(18,863)	(37,044)	(38,551)
Operating Segments | Contract Drilling
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	21,720	(58,229)	18,556	(106,850)
Operating Segments | Pressure Pumping
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	20,091	(23,921)	26,512	(63,660)
Operating Segments | Directional Drilling
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	4,028	(5,110)	5,816	(10,033)
Other Operations
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	$ 3,300	$ (3,287)	$ 4,041	$ (7,843)