Segment Information - Total assets (Details) - USD ($) $ in Thousands		Jun. 30, 2022	Dec. 31, 2021
Segment Information
Total assets	[1]	$ 4,800,983	$ 5,525,364
Operating segments | U.S. Drilling
Segment Information
Total assets		1,496,033	1,606,683
Operating segments | Canada Drilling
Segment Information
Total assets		410	1,392
Operating segments | International Drilling
Segment Information
Total assets		2,290,381	2,380,703
Operating segments | Drilling Solutions
Segment Information
Total assets		60,220	65,899
Operating segments | Rig Technologies
Segment Information
Total assets		175,962	190,489
Other reconciling items
Segment Information
Total assets		$ 777,977	$ 1,280,198

[1] The condensed consolidated balance sheet as of June 30, 2022 and December 31, 2021 include assets and liabilities of variable interest entities. See Note 3—Joint Ventures for additional information.