| Segment Reporting [Table Text Block] |
The tables that follow present information about our business segments, as well as the Unallocated Expenses category, and include a reconciliation to income (loss) before income taxes: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the Three Months Ended June 30, 2026 | | (in thousands) | | Subsea Robotics | | Manufactured Products | | OPG | | IMDS | | ADTech | | Unallocated Expenses | | Total | | | | | | | | | | | | | | | | | | Revenue | | $ | 232,016 | | | $ | 149,030 | | | $ | 182,843 | | | $ | 70,844 | | | $ | 133,451 | | | $ | — | | | $ | 768,184 | | | Cost of services and products | | 150,146 | | | 117,173 | | | 142,672 | | | 62,944 | | | 108,611 | | | 29,656 | | | 611,202 | | | | | | | | | | | | | | | | | Selling, general and administrative 1 | | 15,545 | | | 9,922 | | | 10,152 | | | 7,800 | | | 8,415 | | | 16,911 | | | 68,745 | | | Operating income (loss) | | 66,325 | | | 21,935 | | | 30,019 | | | 100 | | | 16,425 | | | (46,567) | | | 88,237 | | | Interest income | | — | | | — | | | — | | | — | | | — | | | 4,904 | | | 4,904 | | | Interest expense, net of amounts capitalized | | — | | | — | | | — | | | — | | | — | | | (8,456) | | | (8,456) | | | Equity in income (losses) of unconsolidated affiliates | | — | | | — | | | — | | | — | | | — | | | 1,210 | | | 1,210 | | | Other income (expense), net | | — | | | — | | | — | | | — | | | — | | | 182 | | | 182 | | | Income (loss) before income taxes | | $ | 66,325 | | | $ | 21,935 | | | $ | 30,019 | | | $ | 100 | | | $ | 16,425 | | | $ | (48,727) | | | $ | 86,077 | | | | | | | | | | | | | | | | | | | Depreciation and amortization | | $ | 14,220 | | | $ | 2,779 | | | $ | 4,679 | | | $ | 1,966 | | | $ | 1,016 | | | $ | 2,769 | | | $ | 27,429 | | | Capital expenditures, including business acquisitions | | $ | 11,495 | | | $ | 1,642 | | | $ | 4,408 | | | $ | 1,636 | | | $ | 2,567 | | | $ | 1,432 | | | $ | 23,180 | | | | | | | | | | | | | | | | | | | | | 1 | For all reportable segments, Selling, general and administrative expense primarily includes payroll and related costs including subcontractors and temporary labor, lease and rental expense, maintenance and supplies expense, insurance expense and certain overhead expenses. | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the Six Months Ended June 30, 2026 | | (in thousands) | | Subsea Robotics | | Manufactured Products | | OPG | | IMDS | | ADTech | | Unallocated Expenses | | Total | | | | | | | | | | | | | | | | | | Revenue | | $ | 446,289 | | | $ | 292,678 | | | $ | 318,219 | | | $ | 138,728 | | | $ | 264,699 | | | $ | — | | | $ | 1,460,613 | | | Cost of services and products | | 294,479 | | | 224,815 | | | 249,639 | | | 124,131 | | | 223,490 | | | 59,807 | | | 1,176,361 | | | | | | | | | | | | | | | | | Selling, general and administrative 1 | | 29,977 | | | 19,843 | | | 20,217 | | | 15,495 | | | 16,673 | | | 36,022 | | | 138,227 | | | Operating income (loss) | | 121,833 | | | 48,020 | | | 48,363 | | | (898) | | | 24,536 | | | (95,829) | | | 146,025 | | | Interest income | | — | | | — | | | — | | | — | | | — | | | 9,965 | | | 9,965 | | | Interest expense, net of amounts capitalized | | — | | | — | | | — | | | — | | | — | | | (17,561) | | | (17,561) | | | Equity in income (losses) of unconsolidated affiliates | | — | | | — | | | — | | | — | | | — | | | 1,487 | | | 1,487 | | | Other income (expense), net | | — | | | — | | | — | | | — | | | — | | | 990 | | | 990 | | | Income (loss) before income taxes | | $ | 121,833 | | | $ | 48,020 | | | $ | 48,363 | | | $ | (898) | | | $ | 24,536 | | | $ | (100,948) | | | $ | 140,906 | | | | | | | | | | | | | | | | | | | Depreciation and amortization | | $ | 27,938 | | | $ | 5,553 | | | $ | 9,434 | | | $ | 3,908 | | | $ | 2,022 | | | $ | 5,745 | | | $ | 54,600 | | | Capital expenditures, including business acquisitions | | $ | 20,018 | | | $ | 2,724 | | | $ | 6,809 | | | $ | 3,877 | | | $ | 3,914 | | | $ | 3,243 | | | $ | 40,585 | | | | | | | | | | | | | | | | | | | | | 1 | For all reportable segments, Selling, general and administrative expense primarily includes payroll and related costs including subcontractors and temporary labor, lease and rental expense, maintenance and supplies expense, insurance expense and certain overhead expenses. | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | (in thousands) | | Subsea Robotics | | Manufactured Products | | OPG | | IMDS | | ADTech | | Corporate and Other | | Total | | | | | | | | | | | | | | | | | Assets | | $ | 567,134 | | | $ | 381,065 | | | $ | 490,504 | | | $ | 149,121 | | | $ | 152,032 | | | $ | 948,982 | | | $ | 2,688,838 | | | Property and Equipment, Net | | $ | 206,959 | | | $ | 57,274 | | | $ | 139,777 | | | $ | 17,086 | | | $ | 10,568 | | | $ | 11,565 | | | $ | 443,229 | | | Goodwill | | $ | 23,809 | | | $ | — | | | $ | — | | | $ | 16,526 | | | $ | 10,454 | | | $ | — | | | $ | 50,789 | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the Three Months Ended June 30, 2025 | | (in thousands) | | Subsea Robotics | | Manufactured Products | | OPG | | IMDS | | ADTech | | Unallocated Expenses | | Total | | | | | | | | | | | | | | | | | | Revenue | | $ | 218,786 | | | $ | 145,134 | | | $ | 149,281 | | | $ | 75,367 | | | $ | 109,593 | | | $ | — | | | $ | 698,161 | | | Cost of services and products | | 138,839 | | | 116,474 | | | 117,307 | | | 62,882 | | | 85,640 | | | 28,592 | | | 549,734 | | Selling, general and administrative 1 | | 15,442 | | | 9,888 | | | 10,311 | | | 7,838 | | | 7,654 | | | 18,105 | | | 69,238 | | | Operating income (loss) | | 64,505 | | | 18,772 | | | 21,663 | | | 4,647 | | | 16,299 | | | (46,697) | | | 79,189 | | | Interest income | | — | | | — | | | — | | | — | | | — | | | 3,017 | | | 3,017 | | | Interest expense, net of amounts capitalized | | — | | | — | | | — | | | — | | | — | | | (9,472) | | | (9,472) | | | Equity in income (losses) of unconsolidated affiliates | | — | | | — | | | — | | | — | | | — | | | 311 | | | 311 | | | Other income (expense), net | | — | | | — | | | — | | | — | | | — | | | 5,371 | | | 5,371 | | | Income (loss) before income taxes | | $ | 64,505 | | | $ | 18,772 | | | $ | 21,663 | | | $ | 4,647 | | | $ | 16,299 | | | $ | (47,470) | | | $ | 78,416 | | | | | | | | | | | | | | | | | | | Depreciation and amortization | | $ | 12,385 | | | $ | 2,741 | | | $ | 4,663 | | | $ | 1,839 | | | $ | 900 | | | $ | 2,872 | | | $ | 25,400 | | | Capital expenditures, including business acquisitions | | $ | 20,800 | | | $ | 549 | | | $ | 5,810 | | | $ | 515 | | | $ | 1,251 | | | $ | 1,347 | | | $ | 30,272 | | | | | | | | | | | | | | | | | | | | | 1 | For all reportable segments, Selling, general and administrative expense primarily includes payroll and related costs including subcontractors and temporary labor, lease and rental expense, maintenance and supplies expense, insurance expense and certain overhead expenses. | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the Six Months Ended June 30, 2025 | | (in thousands) | | Subsea Robotics | | Manufactured Products | | OPG | | IMDS | | ADTech | | Unallocated Expenses | | Total | | | | | | | | | | | | | | | | | | Revenue | | $ | 424,762 | | | $ | 280,171 | | | $ | 314,222 | | | $ | 146,785 | | | $ | 206,744 | | | $ | — | | | $ | 1,372,684 | | | Cost of services and products | | 272,401 | | | 234,141 | | | 237,370 | | | 123,770 | | | 165,133 | | | 56,431 | | | 1,089,246 | | Selling, general and administrative 1 | | 28,224 | | | 18,591 | | | 19,523 | | | 14,906 | | | 14,647 | | | 34,886 | | | 130,777 | | | Operating income (loss) | | 124,137 | | | 27,439 | | | 57,329 | | | 8,109 | | | 26,964 | | | (91,317) | | | 152,661 | | | Interest income | | — | | | — | | | — | | | — | | | — | | | 6,661 | | | 6,661 | | | Interest expense, net of amounts capitalized | | — | | | — | | | — | | | — | | | — | | | (18,547) | | | (18,547) | | | Equity in income (losses) of unconsolidated affiliates | | — | | | — | | | — | | | — | | | — | | | 673 | | | 673 | | | Other income (expense), net | | — | | | — | | | — | | | — | | | — | | | 6,346 | | | 6,346 | | | Income (loss) before income taxes | | $ | 124,137 | | | $ | 27,439 | | | $ | 57,329 | | | $ | 8,109 | | | $ | 26,964 | | | $ | (96,184) | | | $ | 147,794 | | | | | | | | | | | | | | | | | | | Depreciation and amortization | | $ | 24,121 | | | $ | 5,391 | | | $ | 9,352 | | | $ | 3,569 | | | $ | 1,733 | | | $ | 5,682 | | | $ | 49,848 | | | Capital expenditures, including business acquisitions | | $ | 39,716 | | | $ | 1,333 | | | $ | 10,105 | | | $ | 1,966 | | | $ | 1,851 | | | $ | 1,389 | | | $ | 56,360 | | | | | | | | | | | | | | | | | | | | | 1 | For all reportable segments, Selling, general and administrative expense primarily includes payroll and related costs including subcontractors and temporary labor, lease and rental expense, maintenance and supplies expense, insurance expense and certain overhead expenses. | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2025 | | (in thousands) | | Subsea Robotics | | Manufactured Products | | OPG | | IMDS | | ADTech | | Corporate and Other | | Total | | | | | | | | | | | | | | | | | Assets | | $ | 504,997 | | | $ | 371,000 | | | $ | 456,908 | | | $ | 128,980 | | | $ | 138,144 | | | $ | 727,553 | | | $ | 2,327,582 | | | Property and Equipment, Net | | $ | 219,903 | | | $ | 61,495 | | | $ | 130,655 | | | $ | 15,408 | | | $ | 7,141 | | | $ | 11,065 | | | $ | 445,667 | | | Goodwill | | $ | 23,813 | | | $ | — | | | $ | — | | | $ | 17,116 | | | $ | 10,454 | | | $ | — | | | $ | 51,383 | | | | | | | | | | | | | | | | |
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