| 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: 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
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 | 
 
  Information by geographic area were as follows (in thousands):
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
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  | 
 | 
 | 
 | 
 
  
 |