Selected Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Inventory [Line Items]
Liability for Uncertainty in Income Taxes, Noncurrent	$ 11,000
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	6,400
Inventory, net	197,610	$ 184,375
Inventory:
Subsea Robotics	13,767	10,778
Total	197,610	184,375
Other current assets:
Prepaid expenses	68,050	56,170
Total	74,419	62,539
Other Assets, Noncurrent	122,201	122,224
Accrued liabilities:
Payroll and related costs	122,128	122,380
Accounts Payable, Other, Current	53,847	57,310
Income taxes payable	47,104	44,966
Current operating lease liability	22,395	19,580
Interest Payable, Current	9,919	10,180
Other	54,397	53,030
Total	309,790	307,446
Disclosure Text Block Supplement [Abstract]
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	6,400
Angola [Member]
Inventory [Line Items]
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	6,369	6,369
Disclosure Text Block Supplement [Abstract]
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	6,369	6,369
Subsea Robotics Member
Inventory [Line Items]
Inventory, Gross	77,072	81,701
Disclosure Text Block Supplement [Abstract]
Inventory, Gross	77,072	81,701
Manufactured Products Member
Inventory [Line Items]
Inventory, Gross	106,771	91,896
Disclosure Text Block Supplement [Abstract]
Inventory, Gross	$ 106,771	$ 91,896