Selected Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Inventory [Line Items]
Inventory, net	$ 220,776	$ 222,849
Subsea Robotics	19,162	17,596
Inventory, net:
Total	220,776	222,849
Other Assets, Noncurrent	143,495	144,282
Accrued liabilities:
Payroll and related costs	141,811	153,273
Accounts Payable, Other, Current	48,671	62,390
Income taxes payable	45,509	49,097
Current operating lease liability	131,384	131,415
Interest Payable, Current	5,041	12,667
Other	58,407	65,894
Total	430,823	474,736
Disclosure Text Block Supplement [Abstract]
Subsea Robotics	19,162	17,596
Prepaid Expense, Current	84,817	81,668
Short-term Investments	7,000	7,000
Other Assets, Current	91,817	88,668
Subsea Robotics Member
Inventory [Line Items]
Inventory, Parts and Components, Net of Reserves	109,402	113,104
Disclosure Text Block Supplement [Abstract]
Inventory, Parts and Components, Net of Reserves	109,402	113,104
Manufactured Products Member
Inventory [Line Items]
Inventory, Parts and Components, Net of Reserves	92,212	92,149
Disclosure Text Block Supplement [Abstract]
Inventory, Parts and Components, Net of Reserves	$ 92,212	$ 92,149