Segment Information - Operating revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Information
Operating revenues	$ 630,943	$ 489,333	$ 1,199,482	$ 949,844
U.S. Drilling
Segment Information
Operating revenues	253,008	161,606	470,591	303,905
Canada Drilling
Segment Information
Operating revenues		12,313		33,302
International Drilling
Segment Information
Operating revenues	296,320	255,282	575,350	502,120
Drilling Solutions
Segment Information
Operating revenues	55,879	39,111	110,061	74,817
Rig Technologies
Segment Information
Operating revenues	45,094	34,552	81,830	60,300
Operating segments | U.S. Drilling
Segment Information
Operating revenues	253,008	161,606	470,591	303,905
Operating segments | Canada Drilling
Segment Information
Operating revenues		12,313		33,302
Operating segments | International Drilling
Segment Information
Operating revenues	296,320	255,282	575,350	502,120
Operating segments | Drilling Solutions
Segment Information
Operating revenues	55,879	39,111	110,061	74,817
Operating segments | Rig Technologies
Segment Information
Operating revenues	45,094	34,552	81,830	60,300
Other reconciling items
Segment Information
Operating revenues	$ (19,358)	$ (13,531)	$ (38,350)	$ (24,600)