Selected Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Inventory:
Total	$ 208,827	$ 184,375
Other current assets:
Prepaid expenses	71,259	56,170
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	6,369	6,369
Investments, fair value disclosure		6,400
Total	77,628	62,539
Other Assets, Noncurrent	102,218	122,224
Accrued liabilities:
Payroll and related costs	130,852	122,380
Accounts Payable, Other, Current	62,658	57,310
Income taxes payable	44,320	44,966
Current operating lease liability	46,119	19,580
Interest Payable, Current	9,819	10,180
Other	51,193	53,030
Total	344,961	307,446
Manufactured Products Member
Inventory [Line Items]
Inventory, Parts and Components, Net of Reserves	98,613	91,896
Disclosure Text Block Supplement [Abstract]
Inventory, Parts and Components, Net of Reserves	98,613	91,896
Subsea Robotics Member
Inventory [Line Items]
Inventory, Parts and Components, Net of Reserves	91,639	81,701
Disclosure Text Block Supplement [Abstract]
Inventory, Parts and Components, Net of Reserves	91,639	81,701
Other Segments [Member]
Inventory [Line Items]
Other Inventory, Net of Reserves	$ 18,575	$ 10,778