Segment Information - Operating revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Information
Operating revenues	$ 694,136	$ 524,165	$ 1,893,618	$ 1,474,009
U.S. Drilling
Segment Information
Operating revenues	297,178	173,441	767,769	477,346
Canada Drilling
Segment Information
Operating revenues		6,034		39,336
International Drilling
Segment Information
Operating revenues	306,355	270,008	881,705	772,128
Drilling Solutions
Segment Information
Operating revenues	61,981	45,880	172,042	120,697
Rig Technologies
Segment Information
Operating revenues	50,496	42,053	132,326	102,353
Operating segments | U.S. Drilling
Segment Information
Operating revenues	297,178	173,441	767,769	477,346
Operating segments | Canada Drilling
Segment Information
Operating revenues		6,034		39,336
Operating segments | International Drilling
Segment Information
Operating revenues	306,355	270,008	881,705	772,128
Operating segments | Drilling Solutions
Segment Information
Operating revenues	61,981	45,880	172,042	120,697
Operating segments | Rig Technologies
Segment Information
Operating revenues	50,496	42,053	132,326	102,353
Other reconciling items
Segment Information
Operating revenues	$ (21,874)	$ (13,251)	$ (60,224)	$ (37,851)