Selected Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Inventory:
Total	$ 208,200	$ 184,375
Other current assets:
Prepaid Expense, Current	77,324	56,170
Angolan bonds	0	6,369
Total	77,324	62,539
Other Assets, Noncurrent	100,991	122,224
Accrued liabilities:
Payroll and related costs	151,391	122,380
Accounts Payable, Other, Current	59,220	57,310
Income taxes payable	43,072	44,966
Current operating lease liability	58,995	19,580
Interest Payable, Current	10,122	10,180
Other	51,973	53,030
Total	374,773	307,446
Manufactured Products Member
Inventory [Line Items]
Other inventory	97,422	91,896
Inventory:
Other inventory	97,422	91,896
Subsea Robotics Member
Inventory [Line Items]
Other inventory	94,323	81,701
Inventory:
Other inventory	94,323	81,701
Other Segments
Inventory [Line Items]
Manufactured Products	16,455	10,778
Inventory:
Manufactured Products	$ 16,455	$ 10,778