Annual report [Section 13 and 15(d), not S-K Item 405]

SEGMENT AND GEOGRAPHIC AREA INFORMATION - Capital expenditures by segment And Long lived assets by operating segments (Details)

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SEGMENT AND GEOGRAPHIC AREA INFORMATION - Capital expenditures by segment And Long lived assets by operating segments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting Information [Line Items]      
Total capital expenditures $ 255,393 $ 81,507 $ 49,574
Long-lived assets 1,340,491 1,215,705 1,156,228
Construction-in-progress      
Segment Reporting Information [Line Items]      
Long-lived assets 244,181 99,320 35,352
Total Segment      
Segment Reporting Information [Line Items]      
Long-lived assets 1,093,154 1,112,314 1,115,857
Offshore Energy Services      
Segment Reporting Information [Line Items]      
Total capital expenditures 57,501 22,260 6,184
Long-lived assets 596,687 624,192 696,642
Government Services      
Segment Reporting Information [Line Items]      
Total capital expenditures 189,311 50,119 30,410
Long-lived assets 433,721 427,317 353,715
Other Operating Segment      
Segment Reporting Information [Line Items]      
Total capital expenditures 8,581 9,128 12,980
Long-lived assets 62,746 60,805 65,500
Corporate      
Segment Reporting Information [Line Items]      
Long-lived assets $ 3,156 $ 4,071 $ 5,019