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Selected Balance Sheet Information (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2023
Equity Method Investment, Summarized Financial Information [Abstract]    
Schedule of Other Assets and Other Liabilities [Table Text Block]
The following is information regarding selected balance sheet accounts:
 December 31,
(in thousands)20232022
Inventory, net:
Manufactured Products$104,364 $91,896 
Subsea Robotics87,356 81,701 
Other inventory18,078 10,778 
Total$209,798 $184,375 
Other current assets:
Prepaid expenses$68,464 $56,170 
Angolan bonds— 6,369 
Total$68,464 $62,539 
Other noncurrent assets:
Cash surrender value of life insurance policies$36,588 $33,012 
Investment in unconsolidated affiliates30,455 30,049 
Income tax receivable— 20,170 
Deferred tax asset26,021 — 
Intangible assets, net21,182 11,517 
Other23,040 27,476 
Total$137,286 $122,224 
Accrued liabilities:
Payroll and related costs$154,507 $122,380 
Current operating lease liability78,117 19,580 
Accrued job costs56,112 57,310 
Income taxes payable55,990 44,966 
Accrued interest12,667 10,180 
Other54,388 53,030 
Total$411,781 $307,446 
Other long-term liabilities:
Supplemental Executive Retirement Plan$35,679 $29,635 
Uncertain tax positions27,093 10,869 
Long-Term Incentive Plan12,727 14,479 
Deferred income taxes1,033 2,228 
Other25,375 27,439 
Total$101,907 $84,650 
  
Schedule of Equity Method Investments [Line Items]    
Inventory $ 184,375 $ 209,798
Other Inventory, Net of Reserves 10,778 18,078
Prepaid Expense, Current 56,170 68,464
Other current assets 62,539 68,464
Intangible Assets, Net (Excluding Goodwill) 11,517 21,182
Cash surrender value of life insurance policies 33,012 36,588
Equity Method Investments 30,049 30,455
Other 27,476 23,040
Other non-current assets 122,224 137,286
Payroll and related costs 122,380 154,507
Accrued job costs 57,310 56,112
Accrued Income Taxes, Current 44,966 55,990
Other 53,030 54,388
Accrued Liabilities, Current 307,446 411,781
Liability for Uncertainty in Income Taxes, Noncurrent 10,869 27,093
Supplemental Executive Retirement Plan 29,635 35,679
Other 27,439 25,375
Other Long-term Liabilities 84,650 101,907
Liabilities, Other than Long-term Debt, Noncurrent $ 84,650 $ 101,907