Segment Information - Adjusted operating income (loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Information
Adjusted operating income (loss)	$ 60,371	$ (15,093)	$ 93,397	$ (77,097)
Operating segments
Segment Information
Adjusted operating income (loss)	60,371	(15,093)	93,397	(77,097)
Operating segments | U.S. Drilling
Segment Information
Adjusted operating income (loss)	37,776	(19,700)	40,213	(63,905)
Operating segments | Canada Drilling
Segment Information
Adjusted operating income (loss)	(9)	1,371	(43)	2,670
Operating segments | International Drilling
Segment Information
Adjusted operating income (loss)	(907)	(7,297)	(2,629)	(34,368)
Operating segments | Drilling Solutions
Segment Information
Adjusted operating income (loss)	20,099	8,607	53,068	19,841
Operating segments | Rig Technologies
Segment Information
Adjusted operating income (loss)	$ 3,412	$ 1,926	$ 2,788	$ (1,335)