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Selected Income Statement Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
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)202120202019
Business Segment:
Energy Services and Products
Subsea Robotics$538,515 $493,332 $583,652 
Manufactured Products344,251 477,419 498,350 
Offshore Projects Group378,121 289,127 380,966 
Integrity Management & Digital Solutions241,393 226,938 266,086 
Total Energy Services and Products1,502,280 1,486,816 1,729,054 
Aerospace and Defense Technologies366,995 341,073 319,070 
Total$1,869,275 $1,827,889 $2,048,124 
The following schedule shows our revenue, costs and gross margins by services and products: 
 Year Ended December 31,
(in thousands)202120202019
Revenue:
Services$1,503,745 $1,340,033 $1,333,787 
Products365,530 487,856 714,337 
Total revenue1,869,275 1,827,889 2,048,124 
Cost of Services and Products:
Services1,215,994 1,161,699 1,242,006 
Products295,514 421,445 619,490 
Unallocated expenses93,702 80,804 88,384 
Total cost of services and products1,605,210 1,663,948 1,949,880 
Gross margin:
Services287,751 178,334 91,781 
Products70,016 66,411 94,847 
Unallocated expenses(93,702)(80,804)(88,384)
Total gross margin$264,065 $163,941 $98,244 
  
Revenue:      
Revenues $ 1,869,275 $ 1,827,889 $ 2,048,124
Cost of Services and Products:      
Unallocated expenses 93,702 80,804 88,384
Total cost of services and products 1,605,210 1,663,948 1,949,880
Gross margin:      
Gross Margin (264,065) (163,941) (98,244)
Service [Member]      
Revenue:      
Revenues 1,503,745 1,340,033 1,333,787
Cost of Services and Products:      
Total cost of services and products 1,215,994 1,161,699 1,242,006
Gross margin:      
Gross Margin (287,751) (178,334) (91,781)
Product [Member]      
Revenue:      
Revenues 365,530 487,856 714,337
Cost of Services and Products:      
Total cost of services and products 295,514 421,445 619,490
Gross margin:      
Gross Margin (70,016) (66,411) (94,847)
Unallocated Expenses Member      
Gross margin:      
Gross Margin $ 93,702 $ 80,804 $ 88,384