Segment Information - Adjusted operating income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Information
Adjusted operating income (loss)	$ 194,414	$ (80,787)	$ (171,461)
Operating segments
Segment Information
Adjusted operating income (loss)	194,414	(80,787)	(171,461)
Operating segments | U.S. Drilling
Segment Information
Adjusted operating income (loss)	108,506	(76,492)	(96,176)
Operating segments | Canada Drilling
Segment Information
Adjusted operating income (loss)	13	2,893	(11,766)
Operating segments | International Drilling
Segment Information
Adjusted operating income (loss)	(879)	(40,117)	(56,205)
Operating segments | Drilling Solutions
Segment Information
Adjusted operating income (loss)	77,868	32,771	6,167
Operating segments | Rig Technologies
Segment Information
Adjusted operating income (loss)	$ 8,906	$ 158	$ (13,481)