Summary Of Major Accounting Policies Summary Of Major Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Revenue Recognition	Revenue Recognition. All of our revenue is realized through contracts with customers. We recognize our revenue according to the contract type. On a daily basis, we recognize service revenue over time for contracts that provide for specific time, material and equipment charges, which we bill periodically, ranging from weekly to monthly. We use the input method to recognize revenue, because each day of service provided represents value to the customer. The performance obligations in these contracts are satisfied, and revenue is recognized, as the work is performed. When appropriate, we apply the practical expedient to recognize revenue for the amount invoiced when the invoice corresponds directly to the value of our performance to date. We account for significant fixed-price contracts, mainly relating to our Manufactured Products segment, and to a lesser extent in our Offshore Projects Group (“OPG”) and Aerospace and Defense Technologies (“ADTech”) segments, by recognizing revenue over time using the cost-to-cost input method. The performance obligation is satisfied as we create a product on behalf of the customer over the life of the contract. In 2023, 2022 and 2021, we accounted for 19%, 15% and 16%, respectively, of our revenue using the cost-to-cost input method to measure progress toward satisfying the related performance obligations on our contracts. The remainder of our revenue is recognized at the point in time when control transfers to the customer, thus satisfying the performance obligation. We have elected to recognize the cost for freight and shipping as an expense when incurred. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by us from customers, are excluded from revenue. In our service-based business lines, we principally charge on a dayrate basis for services provided. In our product-based business lines, predominantly in our Manufactured Products segment, we recognize revenue and profit using the percentage-of-completion method and exclude uninstalled materials and significant inefficiencies from the measure of progress. We apply judgment in the determination and allocation of transaction price to performance obligations and the subsequent recognition of revenue, based on the facts and circumstances of each contract. We routinely review estimates related to our contracts and, when required, reflect revisions to profitability in earnings immediately. If an element of variable consideration has the potential for a significant future reversal of revenue, we will constrain that variable consideration to a level intended to remove the potential future reversal. If a current estimate of total contract cost indicates an ultimate loss on a contract, we recognize the projected loss in full when we determine it. During the year ended December 31, 2023, we recognized a projected loss of $9.8 million for contracts in our Manufactured Products segment. During the year ended December 31, 2022, we recognized a projected loss of $5.2 million for contracts in our Manufactured Products segment. During the year ended December 31, 2021, we recognized a projected loss of $3.6 million for a contract in our Subsea Robotics segment. There could be significant adjustments to overall contract costs in the future, due to changes in facts and circumstances. In general, our payment terms consist of those services billed regularly as provided and those products delivered at a point in time, which are invoiced after the performance obligation is satisfied. Our product and service contracts with milestone payments due at agreed progress points during the contract are invoiced when those milestones are reached, which may differ from the timing of revenue recognition. Our payment terms generally do not provide financing of contracts to customers, nor do we receive financing from customers as a result of these terms. See Note 3—“Revenue” for more information on our revenue from contracts with customers.
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	2. ACCOUNTING STANDARDS UPDATE Recently Issued Accounting Standards. In November 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” (“Topic 280”), which requires enhanced disclosures about significant segment expenses. Under Topic 280, companies are required to disclose, on an annual and interim basis, any significant segment expense that is regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit or loss. The title and position of the CODM must be disclosed plus an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. Topic 280 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024,and must be applied retrospectively to all prior periods presented in the financial statements. We anticipate that Topic 280 will only impact our disclosures and therefore do not expect that Topic 280 will have a material impact on our consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740):Improvements to Income Tax Disclosures” (“Topic 740”), which applies to all entities subject to income taxes. Topic 740 requires disaggregated information about a reporting entity’s effective tax rate reconciliation, including percentages and amounts, as well as information on income taxes paid, net of refunds disaggregated by federal, state, local and foreign and by jurisdiction if the amount is 5% or more of total income tax payments, net of refunds. Topic 740 is effective for annual periods beginning after December 15, 2024. The guidance will be applied on a prospective basis with the option to apply the standard retrospectively. We anticipate that Topic 740 will only impact our disclosures and therefore do not expect that Topic 740 will have a material impact on our consolidated financial statements.
Percentage of Completion Percent of Revenue	19.00%	15.00%	16.00%
Revenues	$ 2,424,706	$ 2,066,084	$ 1,869,275
Cost of Goods and Services Sold	2,025,735	1,758,707	1,605,210
Income Tax Expense (Benefit)	63,652	53,111	43,598
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	97,403	25,941	$ (49,307)
Inventory, Net	209,798	184,375
Accrued Liabilities, Current	411,781	307,446
Liabilities, Other than Long-term Debt, Noncurrent	101,907	84,650
Retained Earnings (Accumulated Deficit)	$ 1,425,257	$ 1,327,854

Summary Of Major Accounting Policies Summary Of Major Accounting Policies - Revenue Recognition (Details) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Accounting Policies [Abstract]

Revenue Recognition

Revenue Recognition. All of our revenue is realized through contracts with customers. We recognize our revenue according to the contract type. On a daily basis, we recognize service revenue over time for contracts that provide for specific time, material and equipment charges, which we bill periodically, ranging from weekly to monthly. We use the input method to recognize revenue, because each day of service provided represents value to the customer. The performance obligations in these contracts are satisfied, and revenue is recognized, as the work is performed. When appropriate, we apply the practical expedient to recognize revenue for the amount invoiced when the invoice corresponds directly to the value of our performance to date.

We account for significant fixed-price contracts, mainly relating to our Manufactured Products segment, and to a lesser extent in our Offshore Projects Group (“OPG”) and Aerospace and Defense Technologies (“ADTech”) segments, by recognizing revenue over time using the cost-to-cost input method. The performance obligation is satisfied as we create a product on behalf of the customer over the life of the contract. In 2023, 2022 and 2021, we accounted for 19%, 15% and 16%, respectively, of our revenue using the cost-to-cost input method to measure progress toward satisfying the related performance obligations on our contracts. The remainder of our revenue is recognized at the point in time when control transfers to the customer, thus satisfying the performance obligation.

We have elected to recognize the cost for freight and shipping as an expense when incurred. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by us from customers, are excluded from revenue.

In our service-based business lines, we principally charge on a dayrate basis for services provided. In our product-based business lines, predominantly in our Manufactured Products segment, we recognize revenue and profit using the percentage-of-completion method and exclude uninstalled materials and significant inefficiencies from the measure of progress.

We apply judgment in the determination and allocation of transaction price to performance obligations and the subsequent recognition of revenue, based on the facts and circumstances of each contract. We routinely review estimates related to our contracts and, when required, reflect revisions to profitability in earnings immediately. If an element of variable consideration has the potential for a significant future reversal of revenue, we will constrain that variable consideration to a level intended to remove the potential future reversal. If a current estimate of total contract cost indicates an ultimate loss on a contract, we recognize the projected loss in full when we determine it. During the year ended December 31, 2023, we recognized a projected loss of $9.8 million for contracts in our Manufactured Products segment. During the year ended December 31, 2022, we recognized a projected loss of $5.2 million for contracts in our Manufactured Products segment. During the year ended December 31, 2021, we recognized a projected loss of $3.6 million for a contract in our Subsea Robotics segment. There could be significant adjustments to overall contract costs in the future, due to changes in facts and circumstances.

In general, our payment terms consist of those services billed regularly as provided and those products delivered at a point in time, which are invoiced after the performance obligation is satisfied. Our product and service contracts with milestone payments due at agreed progress points during the contract are invoiced when those milestones are reached, which may differ from the timing of revenue recognition. Our payment terms generally do not provide financing of contracts to customers, nor do we receive financing from customers as a result of these terms.

See Note 3—“Revenue” for more information on our revenue from contracts with customers.

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

New Accounting Pronouncements and Changes in Accounting Principles [Text Block]

2. ACCOUNTING STANDARDS UPDATE

Recently Issued Accounting Standards. In November 2023, the Financial Accounting Standards Board (“FASB”) issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures” (“Topic 280”), which requires enhanced disclosures about significant segment expenses. Under Topic 280, companies are required to disclose, on an annual and interim basis, any significant segment expense that is regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit or loss. The title and position of the CODM must be disclosed plus an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. Topic 280 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024,and must be applied retrospectively to all prior periods presented in the financial statements. We anticipate that Topic 280 will only impact our disclosures and therefore do not expect that Topic 280 will have a material impact on our consolidated financial statements.

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740):Improvements to Income Tax Disclosures” (“Topic 740”), which applies to all entities subject to income taxes. Topic 740 requires disaggregated information about a reporting entity’s effective tax rate reconciliation, including percentages and amounts, as well as information on income taxes paid, net of refunds disaggregated by federal, state, local and foreign and by jurisdiction if the amount is 5% or more of total income tax payments, net of refunds. Topic 740 is effective for annual periods beginning after December 15, 2024. The guidance will be applied on a prospective basis with the option to apply the standard retrospectively. We anticipate that Topic 740 will only impact our disclosures and therefore do not expect that Topic 740 will have a material impact on our consolidated financial statements.

Percentage of Completion Percent of Revenue

19.00%

15.00%

16.00%

Revenues

$ 2,424,706

$ 2,066,084

$ 1,869,275

Cost of Goods and Services Sold

2,025,735

1,758,707

1,605,210