Operations by Business Segment and Geographic Area Operations by Business Segment and Geographic Areas - Schedule of Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	$ 801,444	$ 754,819
Assets	2,667,254	2,336,347	$ 2,239,006
Property, Plant and Equipment, Net	451,693	420,098	424,293
Goodwill	51,023	49,350	34,214
Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets		769,473
Corporate and Other [Member] | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets			725,062
Property, Plant and Equipment, Net		12,177	11,749
Subsea Robotics
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	539,442	476,372
Property, Plant and Equipment, Net	213,616
Goodwill	23,798	23,281	23,760
Subsea Robotics | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets			488,900
Property, Plant and Equipment, Net		198,088	186,995
Manufactured Products
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	330,703	336,664
Property, Plant and Equipment, Net	61,090
Goodwill	0
Manufactured Products | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets			344,215
Property, Plant and Equipment, Net		61,751	68,694
Offshore Projects Group
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	531,561	505,515
Property, Plant and Equipment, Net	141,301
Goodwill	0
Offshore Projects Group | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets			478,937
Property, Plant and Equipment, Net		126,468	135,712
Integrity Management & Digital Solutions
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	134,826	125,890
Property, Plant and Equipment, Net	14,581
Goodwill	16,771	15,615
Integrity Management & Digital Solutions | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets			90,559
Property, Plant and Equipment, Net		14,908	13,712
Aerospace and Defense Technologies
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	142,047	122,433
Property, Plant and Equipment, Net	8,604
Goodwill	10,454	10,454	10,454
Aerospace and Defense Technologies | Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Assets			111,333
Property, Plant and Equipment, Net		6,706	$ 7,431
Corporate Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	988,675
Property, Plant and Equipment, Net	12,501
Goodwill	0
NORWAY
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	79,949	74,754
Africa [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	67,523	87,354
UNITED KINGDOM
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	85,389	77,584
Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	45,221	36,197
BRAZIL
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	89,564	72,449
Segment, Geographical, Groups of Countries, Group Three [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	9,231	10,982
Segment, Geographical, Groups of Countries, Foreign [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	376,877	359,320
UNITED STATES
Segment Reporting, Asset Reconciling Item [Line Items]
Long-Lived Assets	$ 424,567	$ 395,499