Selected Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Inventory [Line Items]
Inventory, net	$ 226,590	$ 222,849
Inventory, net:
Inventory, net	226,590	222,849
Other Assets, Noncurrent	154,080	144,282
Accrued liabilities:
Payroll and related costs	151,852	153,273
Accounts Payable, Other, Current	50,972	62,390
Income taxes payable	43,431	49,097
Current operating lease liability	114,502	131,415
Interest Payable, Current	12,417	12,667
Other	70,113	65,894
Total	443,287	474,736
Disclosure Text Block Supplement [Abstract]
Prepaid Expense, Current	84,849	81,668
Short-term Investments	7,000	7,000
Other Assets, Current	91,849	88,668
Subsea Robotics Member
Inventory [Line Items]
Inventory, Parts and Components, Net of Reserves	121,157	113,104
Disclosure Text Block Supplement [Abstract]
Inventory, Parts and Components, Net of Reserves	121,157	113,104
Manufactured Products Member
Inventory [Line Items]
Inventory, Parts and Components, Net of Reserves	90,404	92,149
Disclosure Text Block Supplement [Abstract]
Inventory, Parts and Components, Net of Reserves	90,404	92,149
Corporate Segment and Other Operating Segment
Inventory [Line Items]
Inventory, net	15,029	17,596
Inventory, net:
Inventory, net	$ 15,029	$ 17,596

Amount of obligations incurred classified as other, payable within one year or the normal operating cycle, if longer.

Name:	us-gaap_AccountsPayableOtherCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).