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Selected Income Statement Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Selected Income Statement Information [Abstract]      
Revenue from External Customers by Products and Services [Table Text Block]  
The following table presents revenue disaggregated by business segment, geographical region, and timing of transfer of goods or services.
Year Ended December 31,
(in thousands)202220212020
Business Segment:
Energy
Subsea Robotics$621,921 $538,515 $493,332 
Manufactured Products382,361 344,251 477,419 
Offshore Projects Group489,317 378,121 289,127 
Integrity Management & Digital Solutions229,884 241,393 226,938 
Total Energy 1,723,483 1,502,280 1,486,816 
Aerospace and Defense Technologies342,601 366,995 341,073 
Total$2,066,084 $1,869,275 $1,827,889 
The following schedule shows our revenue, costs and gross margins by services and products: 
 Year Ended December 31,
(in thousands)202220212020
Revenue:
Services$1,673,024 $1,503,745 $1,340,033 
Products393,060 365,530 487,856 
Total revenue2,066,084 1,869,275 1,827,889 
Cost of Services and Products:
Services1,334,811 1,215,994 1,161,699 
Products341,368 295,514 421,445 
Unallocated expenses82,528 93,702 80,804 
Total cost of services and products1,758,707 1,605,210 1,663,948 
Gross margin:
Services338,213 287,751 178,334 
Products51,692 70,016 66,411 
Unallocated expenses(82,528)(93,702)(80,804)
Total gross margin$307,377 $264,065 $163,941 
  
Revenue:      
Revenues $ 2,066,084 $ 1,869,275 $ 1,827,889
Cost of Services and Products:      
Total cost of services and products 1,758,707 1,605,210 1,663,948
Gross margin:      
Gross Margin (307,377) (264,065) (163,941)
Service [Member]      
Revenue:      
Revenues 1,673,024 1,503,745 1,340,033
Cost of Services and Products:      
Total cost of services and products 1,334,811 1,215,994 1,161,699
Gross margin:      
Gross Margin (338,213) (287,751) (178,334)
Product [Member]      
Revenue:      
Revenues 393,060 365,530 487,856
Cost of Services and Products:      
Total cost of services and products 341,368 295,514 421,445
Gross margin:      
Gross Margin (51,692) (70,016) (66,411)
Unallocated Expenses Member      
Cost of Services and Products:      
Total cost of services and products 82,528 93,702 80,804
Gross margin:      
Gross Margin $ 82,528 $ 93,702 $ 80,804