Operations by Business Segment and Geographic Area Operations by Business Segment and Geographic Area - Other Significant Reconciling Items (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Other Adjustments to Income, Discontinued Operations			$ 1,308
Depreciation	$ 99,000	$ 113,000	136,000
Operating Lease, Right-of-Use Asset	337,554	139,611
Amortization of Intangible Assets	6,400	7,500	3,800
Property, Plant and Equipment, Additions	100,726	81,043	50,199
Corporate and Other [Member] | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	2,880	10,795	6,288
Subsea Robotics | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	67,197	55,649	27,591
Manufactured Products | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	6,776	4,129	2,510
Offshore Projects Group | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	8,574	4,456	7,980
Integrity Management & Digital Solutions | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	10,346	4,058	3,305
Aerospace and Defense Technologies | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	4,953	1,956	2,525
energy service and product | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Property, Plant and Equipment, Additions	$ 92,893	$ 68,292	$ 41,386