Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Operating revenues	$ 568,539	$ 460,511
Operating Segments
Disaggregation of Revenue [Line Items]
Operating revenues	568,539	460,511
Operating Segments | Lower 48
Disaggregation of Revenue [Line Items]
Operating revenues	229,545	140,521
Operating Segments | U.S. Offshore Gulf Of Mexico
Disaggregation of Revenue [Line Items]
Operating revenues	33,676	29,929
Operating Segments | Alaska
Disaggregation of Revenue [Line Items]
Operating revenues	14,622	5,708
Operating Segments | CANADA
Disaggregation of Revenue [Line Items]
Operating revenues	1,415	22,343
Operating Segments | Middle East & Asia
Disaggregation of Revenue [Line Items]
Operating revenues	211,522	186,256
Operating Segments | Latin America
Disaggregation of Revenue [Line Items]
Operating revenues	74,824	60,487
Operating Segments | Europe, Africa & CIS
Disaggregation of Revenue [Line Items]
Operating revenues	21,927	26,336
Operating Segments | US Segment
Disaggregation of Revenue [Line Items]
Operating revenues	217,583	142,299
Operating Segments | US Segment | Lower 48
Disaggregation of Revenue [Line Items]
Operating revenues	172,797	109,534
Operating Segments | US Segment | U.S. Offshore Gulf Of Mexico
Disaggregation of Revenue [Line Items]
Operating revenues	30,440	27,193
Operating Segments | US Segment | Alaska
Disaggregation of Revenue [Line Items]
Operating revenues	14,346	5,572
Operating Segments | Canada Segment
Disaggregation of Revenue [Line Items]
Operating revenues		20,989
Operating Segments | Canada Segment | CANADA
Disaggregation of Revenue [Line Items]
Operating revenues		20,989
Operating Segments | International Excluding Canada
Disaggregation of Revenue [Line Items]
Operating revenues	279,030	246,838
Operating Segments | International Excluding Canada | Middle East & Asia
Disaggregation of Revenue [Line Items]
Operating revenues	190,696	168,187
Operating Segments | International Excluding Canada | Latin America
Disaggregation of Revenue [Line Items]
Operating revenues	68,895	55,908
Operating Segments | International Excluding Canada | Europe, Africa & CIS
Disaggregation of Revenue [Line Items]
Operating revenues	19,439	22,743
Operating Segments | Drilling Solutions
Disaggregation of Revenue [Line Items]
Operating revenues	54,182	35,706
Operating Segments | Drilling Solutions | Lower 48
Disaggregation of Revenue [Line Items]
Operating revenues	34,060	18,448
Operating Segments | Drilling Solutions | U.S. Offshore Gulf Of Mexico
Disaggregation of Revenue [Line Items]
Operating revenues	3,236	2,736
Operating Segments | Drilling Solutions | Alaska
Disaggregation of Revenue [Line Items]
Operating revenues	276	136
Operating Segments | Drilling Solutions | CANADA
Disaggregation of Revenue [Line Items]
Operating revenues	436	454
Operating Segments | Drilling Solutions | Middle East & Asia
Disaggregation of Revenue [Line Items]
Operating revenues	10,026	8,991
Operating Segments | Drilling Solutions | Latin America
Disaggregation of Revenue [Line Items]
Operating revenues	5,929	4,567
Operating Segments | Drilling Solutions | Europe, Africa & CIS
Disaggregation of Revenue [Line Items]
Operating revenues	219	374
Operating Segments | Rig Services
Disaggregation of Revenue [Line Items]
Operating revenues	36,736	25,748
Operating Segments | Rig Services | Lower 48
Disaggregation of Revenue [Line Items]
Operating revenues	22,688	12,539
Operating Segments | Rig Services | CANADA
Disaggregation of Revenue [Line Items]
Operating revenues	979	900
Operating Segments | Rig Services | Middle East & Asia
Disaggregation of Revenue [Line Items]
Operating revenues	10,800	9,078
Operating Segments | Rig Services | Latin America
Disaggregation of Revenue [Line Items]
Operating revenues		12
Operating Segments | Rig Services | Europe, Africa & CIS
Disaggregation of Revenue [Line Items]
Operating revenues	2,269	3,219
Operating Segments | Other
Disaggregation of Revenue [Line Items]
Operating revenues	(18,992)	(11,069)
Intersegment Eliminations | Other.
Disaggregation of Revenue [Line Items]
Operating revenues	(18,992)	(11,069)
Intersegment Eliminations | Other | Other.
Disaggregation of Revenue [Line Items]
Operating revenues	(18,992)	(11,069)
Other reconciling items (3)
Disaggregation of Revenue [Line Items]
Operating revenues	$ 18,992	$ 11,069