| Schedule of Operating Performance and Total Assets by Segment | Financial information by segment for the twelve months ended December 31, 2024 and 2023 and for the nine months ended December 31, 2022 is summarized below (in thousands): 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Offshore Energy Services |  | Government Services |  | Other Services |  | Corporate |  | Consolidated |  
| Twelve Months Ended December 31, 2024
 |  |  |  |  |  |  |  |  |  |  
| Revenues | $ | 966,064 |  |  | $ | 329,654 |  |  | $ | 119,773 |  |  | $ | — |  |  | $ | 1,415,491 |  |  
| Less: |  |  |  |  |  |  |  |  |  |  
| Personnel | 218,811 |  |  | 97,256 |  |  | 24,493 |  |  | — |  |  | 340,560 |  |  
| Repairs and maintenance | 211,791 |  |  | 48,893 |  |  | 12,600 |  |  | — |  |  | 273,284 |  |  
| Insurance | 16,464 |  |  | 7,296 |  |  | 1,147 |  |  | — |  |  | 24,907 |  |  
| Fuel | 58,318 |  |  | 9,072 |  |  | 19,556 |  |  | — |  |  | 86,946 |  |  
| Leased-in equipment | 60,515 |  |  | 37,995 |  |  | 5,030 |  |  | — |  |  | 103,540 |  |  
| Other segment costs | 144,741 |  |  | 43,392 |  |  | 24,748 |  |  | — |  |  | 212,881 |  |  
| Total operating expenses | 710,640 |  |  | 243,904 |  |  | 87,574 |  |  | — |  |  | 1,042,118 |  |  
| General and administrative expenses | 98,972 |  |  | 36,986 |  |  | 7,082 |  |  | 32,510 |  |  | 175,550 |  |  
| Depreciation and amortization expense | 28,404 |  |  | 27,694 |  |  | 11,370 |  |  | 819 |  |  | 68,287 |  |  
| Total costs and expenses | 838,016 |  |  | 308,584 |  |  | 106,026 |  |  | 33,329 |  |  | 1,285,955 |  |  
| Losses on disposal of assets | — |  |  | — |  |  | — |  |  | (1,045) |  |  | (1,045) |  |  
| Earnings from unconsolidated affiliates | 4,117 |  |  | — |  |  | — |  |  | — |  |  | 4,117 |  |  
| Operating income (loss) | $ | 132,165 |  |  | $ | 21,070 |  |  | $ | 13,747 |  |  | $ | (34,374) |  |  | $ | 132,608 |  | 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Offshore Energy Services |  | Government Services |  | Other |  | Corporate |  | Consolidated |  
| Twelve Months Ended December 31, 2023
 |  |  |  |  |  |  |  |  |  |  
| Revenues | $ | 852,956 |  |  | $ | 337,280 |  |  | $ | 107,193 |  |  | $ | — |  |  | $ | 1,297,429 |  |  
| Less: |  |  |  |  |  |  |  |  |  |  
| Personnel | 210,138 |  |  | 90,498 |  |  | 23,045 |  |  | — |  |  | 323,681 |  |  
| Repairs and maintenance | 191,699 |  |  | 49,859 |  |  | 12,358 |  |  | — |  |  | 253,916 |  |  
| Insurance | 14,893 |  |  | 7,898 |  |  | 994 |  |  | — |  |  | 23,785 |  |  
| Fuel | 63,823 |  |  | 10,446 |  |  | 17,230 |  |  | — |  |  | 91,499 |  |  
| Leased-in equipment | 56,971 |  |  | 38,033 |  |  | 4,092 |  |  | — |  |  | 99,096 |  |  
| Other segment costs | 139,529 |  |  | 41,765 |  |  | 17,132 |  |  | — |  |  | 198,426 |  |  
| Total operating expenses | 677,053 |  |  | 238,499 |  |  | 74,851 |  |  | — |  |  | 990,403 |  |  
| General and administrative expenses | 104,471 |  |  | 40,070 |  |  | 7,176 |  |  | 30,028 |  |  | 181,745 |  |  
| Merger and integration costs | 2,201 |  |  | — |  |  | — |  |  | — |  |  | 2,201 |  |  
| Depreciation and amortization expense | 30,783 |  |  | 29,101 |  |  | 9,768 |  |  | 954 |  |  | 70,606 |  |  
| Total costs and expenses | 814,508 |  |  | 307,670 |  |  | 91,795 |  |  | 30,982 |  |  | 1,244,955 |  |  
| Gains on disposal of assets | — |  |  | — |  |  | — |  |  | 1,112 |  |  | 1,112 |  |  
| Earnings from unconsolidated affiliates | 7,165 |  |  | — |  |  | — |  |  | — |  |  | 7,165 |  |  
| Operating income (loss) | $ | 45,613 |  |  | $ | 29,610 |  |  | $ | 15,398 |  |  | $ | (29,870) |  | $ | — |  | $ | 60,751 |  | 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Offshore Energy Services |  | Government Services |  | Other |  | Corporate |  | Consolidated |  
| Nine Months Ended December 31, 2022 |  |  |  |  |  |  |  |  |  |  
| Revenues | $ | 625,199 |  |  | $ | 217,360 |  |  | $ | 80,010 |  |  | $ | — |  |  | $ | 922,569 |  |  
| Less: |  |  |  |  |  |  |  |  |  |  
| Personnel | 151,380 |  |  | 53,159 |  |  | 15,633 |  |  | — |  |  | 220,172 |  |  
| Repairs and maintenance | 154,279 |  |  | 32,984 |  |  | 12,491 |  |  | — |  |  | 199,754 |  |  
| Insurance | 8,454 |  |  | 4,142 |  |  | 712 |  |  | — |  |  | 13,308 |  |  
| Fuel | 61,390 |  |  | 8,921 |  |  | 15,591 |  |  | — |  |  | 85,902 |  |  
| Leased-in equipment | 41,650 |  |  | 24,374 |  |  | 5,899 |  |  | — |  |  | 71,923 |  |  
| Other segment costs | 94,238 |  |  | 17,397 |  |  | 12,176 |  |  | — |  |  | 123,811 |  |  
| Total operating expenses | 511,391 |  |  | 140,977 |  |  | 62,502 |  |  | — |  |  | 714,870 |  |  
| General and administrative expenses | 69,625 |  |  | 27,473 |  |  | 4,709 |  |  | 21,234 |  |  | 123,041 |  |  
| Merger and integration costs | 652 |  |  | 191 |  |  | — |  |  | 151 |  |  | 994 |  |  
| Depreciation and amortization expense | 24,404 |  |  | 18,953 |  |  | 5,776 |  |  | 454 |  |  | 49,587 |  |  
| Total costs and expenses | 606,072 |  |  | 187,594 |  |  | 72,987 |  |  | 21,839 |  |  | 888,492 |  |  
| Loss on impairment | (4,580) |  |  | (40) |  |  | (567) |  |  | — |  |  | (5,187) |  |  
| Losses on disposal of assets | — |  |  | — |  |  | — |  |  | (480) |  |  | (480) |  |  
| Earnings from unconsolidated affiliates | 1,461 |  |  | — |  |  | — |  |  | — |  |  | 1,461 |  |  
| Operating income (loss) | $ | 16,008 |  |  | $ | 29,726 |  |  | $ | 6,456 |  |  | $ | (22,319) |  |  | $ | 29,871 |  | Total depreciation and amortization expense by segment for the periods reflected below were as follows: 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Offshore Energy Services |  | Government Services |  | Other |  | Corporate |  | Consolidated |  
|  |  |  |  |  |  |  |  |  |  |  
| Twelve Months Ended December 31, 2024 |  |  |  |  |  |  |  |  |  |  
| Depreciation and amortization expense | $ | 28,404 |  |  | $ | 27,694 |  |  | $ | 11,370 |  |  | $ | 819 |  |  | $ | 68,287 |  |  
| PBH amortization | 12,230 |  |  | 2,002 |  |  | 669 |  |  | — |  |  | 14,901 |  |  
| Total depreciation and amortization expense | $ | 40,634 |  |  | $ | 29,696 |  |  | $ | 12,039 |  |  | $ | 819 |  |  | $ | 83,188 |  |  
|  |  |  |  |  |  |  |  |  |  |  
| Twelve Months Ended December 31, 2023 |  |  |  |  |  |  |  |  |  |  
| Depreciation and amortization expense | $ | 30,783 |  |  | $ | 29,101 |  |  | $ | 9,768 |  |  | $ | 954 |  |  | $ | 70,606 |  |  
| PBH amortization | 12,377 |  |  | 1,940 |  |  | 663 |  |  | — |  |  | 14,980 |  |  
| Total depreciation and amortization expense | $ | 43,160 |  |  | $ | 31,041 |  |  | $ | 10,431 |  |  | $ | 954 |  |  | $ | 85,586 |  |  
|  |  |  |  |  |  |  |  |  |  |  
| Nine Months Ended December 31, 2022 |  |  |  |  |  |  |  |  |  |  
| Depreciation and amortization expense | $ | 24,404 |  |  | $ | 18,953 |  |  | $ | 5,776 |  |  | $ | 454 |  |  | $ | 49,587 |  |  
| PBH amortization | 9,061 |  |  | 841 |  |  | 328 |  |  | — |  |  | 10,230 |  |  
| Total depreciation and amortization expense | $ | 33,465 |  |  | $ | 19,794 |  |  | $ | 6,104 |  |  | $ | 454 |  |  | $ | 59,817 |  | Capital expenditures by segment for the periods reflected below were as follows: 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Twelve Months Ended |  | Nine Months Ended |  
|  | December 31, 2024 |  | December 31, 2023 |  | December 31, 2022 |  
| Offshore Energy Services | $ | 57,501 |  | $ | 22,260 |  |  | $ | 6,184 |  |  
| Government Services | 189,311 |  | 50,119 |  |  | 30,410 |  |  
| Other Services | 8,581 |  | 9,128 |  |  | 12,980 |  |  
| Total capital expenditures | $ | 255,393 |  | $ | 81,507 |  |  | $ | 49,574 |  |  
|  |  |  |  |  |  |  
|  |  |  |  |  |  | Segment assets consisting of property and equipment (excluding construction in progress), net of accumulated depreciation and ROU assets, are reflected below for the periods indicated: Information by geographic area were as follows (in thousands):
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | December 31, 2024 |  | December 31, 2023 |  | December 31, 2022 |  
| Offshore Energy Services | $ | 596,687 |  | $ | 624,192 |  |  | $ | 696,642 |  |  
| Government Services | 433,721 |  | 427,317 |  |  | 353,715 |  |  
| Other Services | 62,746 |  | 60,805 |  |  | 65,500 |  |  
| Total segment assets | $ | 1,093,154 |  | $ | 1,112,314 |  |  | $ | 1,115,857 |  |  
| Corporate | 3,156 |  | 4,071 |  |  | 5,019 |  |  
| Construction-in-progress | 244,181 |  | 99,320 |  |  | 35,352 |  |  
| Total long-lived assets | $ | 1,340,491 |  | $ | 1,215,705 |  | $ | 1,156,228 | 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | Twelve Months Ended |  | Nine Months Ended |  
|  | December 31, 2024
 |  | December 31, 2023
 |  | December 31, 2022
 |  
| Revenues: |  |  |  |  |  |  
| U.K. | $ | 394,659 |  |  | $ | 436,419 |  |  | $ | 305,862 |  |  
| Norway | 270,862 |  |  | 240,793 |  |  | 179,724 |  |  
| U.S. | 226,932 |  |  | 216,588 |  |  | 149,171 |  |  
| Nigeria | 170,006 |  |  | 122,637 |  |  | 76,370 |  |  
| Other | 353,032 |  |  | 280,992 |  |  | 211,442 |  |  
| Total revenues | $ | 1,415,491 |  |  | $ | 1,297,429 |  |  | $ | 922,569 |  |  
|  |  |  |  |  |  |  
|  | December 31, 2024
 |  | December 31, 2023
 |  |  |  
| Long-lived assets: |  |  |  |  |  |  
| UK | $ | 687,315 |  |  | $ | 643,592 |  |  |  |  
| Norway | 156,698 |  |  | 176,424 |  |  |  |  
| U.S. | 169,946 |  |  | 183,363 |  |  |  |  
| Other | 326,532 |  |  | 212,326 |  |  |  |  
| Total long-lived assets | $ | 1,340,491 |  |  | $ | 1,215,705 |  |  |  |  |