Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue Recognition
Revenues	$ 630,943	$ 489,333	$ 1,199,482	$ 949,844
U.S. Drilling
Revenue Recognition
Revenues	253,008	161,606	470,591	303,905
Canada Drilling
Revenue Recognition
Revenues		12,313		33,302
International Drilling
Revenue Recognition
Revenues	296,320	255,282	575,350	502,120
Drilling Solutions
Revenue Recognition
Revenues	55,879	39,111	110,061	74,817
Rig Technologies
Revenue Recognition
Revenues	45,094	34,552	81,830	60,300
Operating segments | Lower 48
Revenue Recognition
Revenues	271,301	158,244	500,851	298,765
Operating segments | U.S. Offshore Gulf Of Mexico
Revenue Recognition
Revenues	32,299	34,789	65,976	64,717
Operating segments | Alaska
Revenue Recognition
Revenues	15,868	7,478	30,489	13,186
Operating segments | Canada
Revenue Recognition
Revenues	1,581	13,900	2,996	36,243
Operating segments | Middle East & Asia
Revenue Recognition
Revenues	217,893	197,371	429,413	383,628
Operating segments | Latin America
Revenue Recognition
Revenues	85,668	63,752	160,490	124,239
Operating segments | Europe, Africa & CIS
Revenue Recognition
Revenues	25,691	27,330	47,617	53,666
Operating segments | U.S. Drilling
Revenue Recognition
Revenues	253,008	161,606	470,591	303,905
Operating segments | U.S. Drilling | Lower 48
Revenue Recognition
Revenues	207,685	121,360	380,483	230,896
Operating segments | U.S. Drilling | U.S. Offshore Gulf Of Mexico
Revenue Recognition
Revenues	29,933	32,967	60,373	60,159
Operating segments | U.S. Drilling | Alaska
Revenue Recognition
Revenues	15,390	7,279	29,735	12,850
Operating segments | Canada Drilling
Revenue Recognition
Revenues		12,313		33,302
Operating segments | Canada Drilling | Canada
Revenue Recognition
Revenues		12,313		33,302
Operating segments | International Drilling
Revenue Recognition
Revenues	296,320	255,282	575,350	502,120
Operating segments | International Drilling | Middle East & Asia
Revenue Recognition
Revenues	195,437	174,339	386,134	342,525
Operating segments | International Drilling | Latin America
Revenue Recognition
Revenues	78,605	57,931	147,500	113,839
Operating segments | International Drilling | Europe, Africa & CIS
Revenue Recognition
Revenues	22,278	23,012	41,716	45,756
Operating segments | Drilling Solutions
Revenue Recognition
Revenues	55,879	39,111	110,061	74,817
Operating segments | Drilling Solutions | Lower 48
Revenue Recognition
Revenues	35,909	21,436	69,970	39,884
Operating segments | Drilling Solutions | U.S. Offshore Gulf Of Mexico
Revenue Recognition
Revenues	2,366	1,822	5,603	4,558
Operating segments | Drilling Solutions | Alaska
Revenue Recognition
Revenues	478	185	754	322
Operating segments | Drilling Solutions | Canada
Revenue Recognition
Revenues	341	204	777	658
Operating segments | Drilling Solutions | Middle East & Asia
Revenue Recognition
Revenues	9,449	9,457	19,474	18,448
Operating segments | Drilling Solutions | Latin America
Revenue Recognition
Revenues	7,063	5,658	12,990	10,224
Operating segments | Drilling Solutions | Europe, Africa & CIS
Revenue Recognition
Revenues	273	349	493	723
Operating segments | Rig Technologies
Revenue Recognition
Revenues	45,094	34,552	81,830	60,300
Operating segments | Rig Technologies | Lower 48
Revenue Recognition
Revenues	27,707	15,448	50,398	27,985
Operating segments | Rig Technologies | Alaska
Revenue Recognition
Revenues		14		14
Operating segments | Rig Technologies | Canada
Revenue Recognition
Revenues	1,240	1,383	2,219	2,283
Operating segments | Rig Technologies | Middle East & Asia
Revenue Recognition
Revenues	13,007	13,575	23,805	22,655
Operating segments | Rig Technologies | Latin America
Revenue Recognition
Revenues		163		176
Operating segments | Rig Technologies | Europe, Africa & CIS
Revenue Recognition
Revenues	3,140	3,969	5,408	7,187
Eliminations & other
Revenue Recognition
Revenues	(19,358)	(13,531)	(38,350)	(24,600)
Eliminations & other | Other
Revenue Recognition
Revenues	$ (19,358)	$ (13,531)	$ (38,350)	$ (24,600)