Segment Information - Operating revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Information
Operating revenues	$ 731,805	$ 733,974	$ 2,200,307	$ 2,280,180
Operating segments | U.S. Drilling
Segment Information
Operating revenues	254,773	276,385	786,485	941,867
Operating segments | International Drilling
Segment Information
Operating revenues	368,594	344,780	1,074,686	1,002,478
Operating segments | Drilling Solutions
Segment Information
Operating revenues	79,544	72,831	238,079	224,729
Operating segments | Rig Technologies
Segment Information
Operating revenues	45,809	61,437	145,511	183,481
Other reconciling items
Segment Information
Operating revenues	$ (16,915)	$ (21,459)	$ (44,454)	$ (72,375)