Business Segments - Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	$ 9,704	$ 76,345	$ 240,249	$ 94,226
Interest income	2,131	58	4,583	87
Interest expense, net of amount capitalized	(15,625)	(10,975)	(34,189)	(32,198)
Other	(618)	(1,774)	3,191	(2,644)
Income before income taxes	(4,408)	63,654	213,834	59,471
Operating Segments | Drilling Services
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	114,737	46,530	329,322	68,629
Operating Segments | Completion Services
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	162	48,949	69,898	75,461
Operating Segments | Drilling Produtcs
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	(6,240)	0	(6,240)	0
Operating Segments | Corporate Segment
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	(99,390)	(23,117)	(154,542)	(60,161)
Other Operations
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Operating income (loss)	$ 435	$ 3,983	$ 1,811	$ 10,297