Segment Information - Adjusted operating income (loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Information
Adjusted operating income (loss)	$ 33,265	$ (26,084)	$ 33,026	$ (62,004)
Operating segments
Segment Information
Adjusted operating income (loss)	33,265	(26,084)	33,026	(62,004)
Operating segments | U.S. Drilling
Segment Information
Adjusted operating income (loss)	8,288	(20,869)	2,437	(44,205)
Operating segments | Canada Drilling
Segment Information
Adjusted operating income (loss)	(15)	(2,608)	(34)	1,299
Operating segments | International Drilling
Segment Information
Adjusted operating income (loss)	4,605	(8,439)	(1,722)	(27,071)
Operating segments | Drilling Solutions
Segment Information
Adjusted operating income (loss)	18,260	6,524	32,969	11,234
Operating segments | Rig Technologies
Segment Information
Adjusted operating income (loss)	$ 2,127	$ (692)	$ (624)	$ (3,261)