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Selected Balance Sheet Information (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2022
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)20222021
Inventory, net:
Remotely operated vehicle parts and components$81,701 $72,572 
Other inventory, primarily raw materials102,674 81,110 
Total$184,375 $153,682 
Other current assets:
Prepaid expenses$56,170 $61,984 
Angolan bonds6,369 6,416 
Total$62,539 $68,400 
Other noncurrent assets:
Cash surrender value of life insurance policies$33,012 $41,922 
Investment in unconsolidated affiliates30,049 30,502 
Income tax receivable20,170 — 
Intangible assets, net11,517 12,641 
Other27,476 19,190 
Total$122,224 $104,255 
Accrued liabilities:
Payroll and related costs$122,380 $134,538 
Accrued job costs57,310 49,032 
Income taxes payable44,966 35,826 
Current operating lease liability19,580 18,781 
Accrued interest10,180 9,937 
Other53,030 42,545 
Total$307,446 $290,659 
Other long-term liabilities:
Supplemental Executive Retirement Plan$29,635 $35,195 
Uncertain tax positions10,869 14,830 
Long-Term Incentive Plan14,479 11,996 
Deferred income taxes2,228 1,375 
Other27,439 26,708 
Total$84,650 $90,104 
  
Schedule of Equity Method Investments [Line Items]    
Inventory $ 153,682 $ 184,375
Other Inventory, Net of Reserves 81,110 102,674
Prepaid Expense, Current 61,984 56,170
Other current assets 68,400 62,539
Intangible Assets, Net (Excluding Goodwill) 12,641 11,517
Cash surrender value of life insurance policies 41,922 33,012
Equity Method Investments 30,502 30,049
Other 19,190 27,476
Other non-current assets 104,255 122,224
Payroll and related costs 134,538 122,380
Accrued job costs 49,032 57,310
Accrued Income Taxes, Current 35,826 44,966
Operating Lease, Liability, Current 18,781 19,580
Other 42,545 53,030
Accrued Liabilities, Current 290,659 307,446
Supplemental Executive Retirement Plan 35,195 29,635
Long-Term Incentive Plan 11,996 14,479
Liability for Uncertainty in Income Taxes, Noncurrent 14,830 10,869
Other 26,708 27,439
Other Long-term Liabilities 90,104 84,650
Liabilities, Other than Long-term Debt, Noncurrent $ 90,104 $ 84,650