Selected Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Accrued Liabilities, Current	$ 411,781	$ 307,446
Equity Method Investments	30,455	30,049
Income Taxes Receivable	0	20,170
Deferred Income Taxes and Other Assets, Noncurrent	26,021	0
Inventory	209,798	184,375
Inventory [Line Items]
Inventory	209,798	184,375
Prepaid Expense, Current	68,464	56,170
Debt Securities, Available-for-sale, Current	0	6,369
Other Inventory, Net of Reserves	18,078	10,778
Other current assets	68,464	62,539
Intangible Assets, Net (Excluding Goodwill)	21,182	11,517
Cash surrender value of life insurance policies	36,588	33,012
Equity Method Investments	30,455	30,049
Other	23,040	27,476
Other Assets, Noncurrent	137,286	122,224
Payroll and related costs	$ 154,507	$ 122,380
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Accrued Liabilities, Current	Accounts Payable and Accrued Liabilities, Current
Accrued job costs	$ 56,112	$ 57,310
Accrued Income Taxes, Current	55,990	44,966
Interest Payable	12,667	10,180
Other	54,388	53,030
Accrued Liabilities, Current	411,781	307,446
Deferred Tax Liabilities, Gross, Noncurrent		2,228
Supplemental Executive Retirement Plan	35,679	29,635
Long-Term Incentive Plan	12,727	14,479
Liability for Uncertainty in Income Taxes, Noncurrent	27,093	10,869
Other	25,375	27,439
Liabilities, Other than Long-term Debt, Noncurrent	101,907	84,650
Manufactured Products
Schedule of Equity Method Investments [Line Items]
Inventory	104,364	91,896
Inventory [Line Items]
Inventory	104,364	91,896
Subsea Robotics
Schedule of Equity Method Investments [Line Items]
Inventory	87,356	81,701
Inventory [Line Items]
Inventory	$ 87,356	$ 81,701