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SEGMENT INFORMATION, GEOGRAPHICAL DATA AND MAJOR CUSTOMERS (Tables) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Segment Reporting [Abstract] |  |
Segment Information, Geographical Data and Major Customers | The following table provides a comparison of segment revenues, vessel operating profit (loss), depreciation and amortization, and additions to properties and equipment for the quarters and six month periods ended June 30, 2018 and 2017. Vessel revenues and operating costs relate to vessels owned and operated by the company while other operating revenues relate to brokered vessels and other miscellaneous marine-related businesses.
|  | Successor |  |  |  |  |  | Predecessor |  |  |  |  |  | Successor |  |  |  |  |  | Predecessor |
(In thousands) |  | Quarter Ended June 30, 2018 |  |  |  |  |  | Quarter Ended June 30, 2017 |  |  |  |  |  | Six Months Ended June 30, 2018 |  |  |  |  |  | Six Months Ended June 30, 2017 |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 32,601 |  |  |  |  |  |  |  | 31,887 |  |  |  |  |  |  |  | 58,682 |  |  |  |  |  |  |  | 112,420 |
Middle East/Asia Pacific |  |  | 22,406 |  |  |  |  |  |  |  | 27,766 |  |  |  |  |  |  |  | 40,794 |  |  |  |  |  |  |  | 54,444 |
Europe/Mediterranean Sea |  |  | 13,357 |  |  |  |  |  |  |  | 11,031 |  |  |  |  |  |  |  | 22,980 |  |  |  |  |  |  |  | 21,197 |
West Africa |  |  | 35,810 |  |  |  |  |  |  |  | 41,573 |  |  |  |  |  |  |  | 69,212 |  |  |  |  |  |  |  | 81,101 |
|  |  | 104,174 |  |  |  |  |  |  |  | 112,257 |  |  |  |  |  |  |  | 191,668 |  |  |  |  |  |  |  | 269,162 |
Other operating revenues (A) |  |  | 1,427 |  |  |  |  |  |  |  | 2,849 |  |  |  |  |  |  |  | 5,426 |  |  |  |  |  |  |  | 6,693 |
|  | $ | 105,601 |  |  |  |  |  |  |  | 115,106 |  |  |  |  |  |  |  | 197,094 |  |  |  |  |  |  |  | 275,855 |
Vessel operating profit (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 5,681 |  |  |  |  |  |  |  | (15,699 | ) |  |  |  |  |  |  | 10,592 |  |  |  |  |  |  |  | 14,919 |
Middle East/Asia Pacific |  |  | 625 |  |  |  |  |  |  |  | (1,316 | ) |  |  |  |  |  |  | (1,628 | ) |  |  |  |  |  |  | (7,480 | )
Europe/Mediterranean Sea |  |  | (1,142 | ) |  |  |  |  |  |  | (10,163 | ) |  |  |  |  |  |  | (4,696 | ) |  |  |  |  |  |  | (17,265 | )
West Africa |  |  | 1,705 |  |  |  |  |  |  |  | (2,774 | ) |  |  |  |  |  |  | (48 | ) |  |  |  |  |  |  | (8,127 | )
|  |  | 6,869 |  |  |  |  |  |  |  | (29,952 | ) |  |  |  |  |  |  | 4,220 |  |  |  |  |  |  |  | (17,953 | )
Other operating profit (loss) |  |  | 778 |  |  |  |  |  |  |  | 55 |  |  |  |  |  |  |  | 2,284 |  |  |  |  |  |  |  | (170 | )
|  |  | 7,647 |  |  |  |  |  |  |  | (29,897 | ) |  |  |  |  |  |  | 6,504 |  |  |  |  |  |  |  | (18,123 | )
Corporate general and administrative expenses |  |  | (7,810 | ) |  |  |  |  |  |  | (14,702 | ) |  |  |  |  |  |  | (14,494 | ) |  |  |  |  |  |  | (36,459 | )
Corporate depreciation |  |  | (100 | ) |  |  |  |  |  |  | (541 | ) |  |  |  |  |  |  | (200 | ) |  |  |  |  |  |  | (1,105 | )
Corporate expenses |  |  | (7,910 | ) |  |  |  |  |  |  | (15,243 | ) |  |  |  |  |  |  | (14,694 | ) |  |  |  |  |  |  | (37,564 | )
Gain on asset dispositions, net |  |  | 1,338 |  |  |  |  |  |  |  | 3,189 |  |  |  |  |  |  |  | 3,257 |  |  |  |  |  |  |  | 9,253 |
Asset impairments (B) |  |  | (1,215 | ) |  |  |  |  |  |  | (163,423 | ) |  |  |  |  |  |  | (7,401 | ) |  |  |  |  |  |  | (228,280 | )
Operating loss |  | $ | (140 | ) |  |  |  |  |  |  | (205,374 | ) |  |  |  |  |  |  | (12,334 | ) |  |  |  |  |  |  | (274,714 | )
Foreign exchange loss |  |  | (1,002 | ) |  |  |  |  |  |  | (1,157 | ) |  |  |  |  |  |  | (1,350 | ) |  |  |  |  |  |  | (493 | )
Equity in net earnings (losses) of unconsolidated companies |  |  | 390 |  |  |  |  |  |  |  | 4,517 |  |  |  |  |  |  |  | (15,049 | ) |  |  |  |  |  |  | 7,358 |
Interest income and other, net |  |  | 2,914 |  |  |  |  |  |  |  | 1,680 |  |  |  |  |  |  |  | 2,786 |  |  |  |  |  |  |  | 3,268 |
Reorganization items |  |  | — |  |  |  |  |  |  |  | (313,176 | ) |  |  |  |  |  |  | — |  |  |  |  |  |  |  | (313,176 | )
Interest and other debt costs, net |  |  | (7,547 | ) |  |  |  |  |  |  | (10,605 | ) |  |  |  |  |  |  | (15,146 | ) |  |  |  |  |  |  | (31,613 | )
Loss before income taxes |  | $ | (5,385 | ) |  |  |  |  |  |  | (524,115 | ) |  |  |  |  |  |  | (41,093 | ) |  |  |  |  |  |  | (609,370 | )
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 3,530 |  |  |  |  |  |  |  | 10,748 |  |  |  |  |  |  |  | 6,843 |  |  |  |  |  |  |  | 22,045 |
Middle East/Asia Pacific |  |  | 2,844 |  |  |  |  |  |  |  | 7,746 |  |  |  |  |  |  |  | 5,613 |  |  |  |  |  |  |  | 16,245 |
Europe/Mediterranean Sea |  |  | 2,239 |  |  |  |  |  |  |  | 6,803 |  |  |  |  |  |  |  | 4,043 |  |  |  |  |  |  |  | 13,364 |
West Africa |  |  | 4,067 |  |  |  |  |  |  |  | 9,595 |  |  |  |  |  |  |  | 8,093 |  |  |  |  |  |  |  | 19,411 |
|  |  | 12,680 |  |  |  |  |  |  |  | 34,892 |  |  |  |  |  |  |  | 24,592 |  |  |  |  |  |  |  | 71,065 |
Other |  |  | 5 |  |  |  |  |  |  |  | 854 |  |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  | 1,709 |
Corporate |  |  | 100 |  |  |  |  |  |  |  | 541 |  |  |  |  |  |  |  | 200 |  |  |  |  |  |  |  | 1,105 |
|  | $ | 12,785 |  |  |  |  |  |  |  | 36,287 |  |  |  |  |  |  |  | 24,802 |  |  |  |  |  |  |  | 73,879 |
Additions to properties and equipment: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 1,230 |  |  |  |  |  |  |  | 27 |  |  |  |  |  |  |  | 2,267 |  |  |  |  |  |  |  | 27 |
Middle East/Asia Pacific |  |  | 1,073 |  |  |  |  |  |  |  | 648 |  |  |  |  |  |  |  | 1,496 |  |  |  |  |  |  |  | 1,673 |
Europe/Mediterranean Sea |  |  | 135 |  |  |  |  |  |  |  | — |  |  |  |  |  |  |  | 135 |  |  |  |  |  |  |  | — |
West Africa |  |  | — |  |  |  |  |  |  |  | 274 |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  | 368 |
|  |  | 2,438 |  |  |  |  |  |  |  | 949 |  |  |  |  |  |  |  | 3,899 |  |  |  |  |  |  |  | 2,068 |
Other |  |  | — |  |  |  |  |  |  |  | — |  |  |  |  |  |  |  | — |  |  |  |  |  |  |  | — |
Corporate (C) |  |  | 1,659 |  |  |  |  |  |  |  | 678 |  |  |  |  |  |  |  | 1,876 |  |  |  |  |  |  |  | 7,632 |
|  | $ | 4,097 |  |  |  |  |  |  |  | 1,627 |  |  |  |  |  |  |  | 5,775 |  |  |  |  |  |  |  | 9,700 |
(A) | Included in other operating revenues for the quarter and six months ended June 30, 2017, were $0.5 million and $0.8 million, respectively, of revenues related to the company’s subsea business. The eight ROVs representing substantially all of the company’s subsea assets were sold in December 2017.
(B) | Refer to Note (14) for additional information regarding asset impairment.
(C) | Included in Corporate are additions to properties and equipment relating to a vessel under construction which has not yet been assigned to a non-corporate reporting segment as of the dates presented.
| The following table provides a comparison of revenues, vessel operating profit, depreciation and amortization, and additions to properties and equipment. Vessel revenues and operating costs relate to vessels owned and operated by the company while other operating revenues relate to the activities of the company’s shipyards, brokered vessels and other miscellaneous marine-related businesses.
|  | Successor |  |  | Predecessor |
(In thousands) |  | Period from August 1, 2017 through December 31, 2017 |  |  | Period from April 1, 2017 through July 31, 2017 |  |  | Year Ended March 31, 2017 |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues: |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 45,784 |  |  |  | 40,848 |  |  |  | 239,843 |
Middle East/Asia Pacific |  |  | 39,845 |  |  |  | 36,313 |  |  |  | 114,618 |
Europe/Mediterranean Sea |  |  | 19,895 |  |  |  | 15,466 |  |  |  | 42,667 |
West Africa |  |  | 66,360 |  |  |  | 53,970 |  |  |  | 186,688 |
|  |  | 171,884 |  |  |  | 146,597 |  |  |  | 583,816 |
Other operating revenues |  |  | 6,869 |  |  |  | 4,772 |  |  |  | 17,795 |
|  | $ | 178,753 |  |  |  | 151,369 |  |  |  | 601,611 |
Vessel operating profit (loss): |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | (1,599 | ) |  |  | (22,549 | ) |  |  | 18,873 |
Middle East/Asia Pacific |  |  | 451 |  |  |  | (1,434 | ) |  |  | (25,310 | )
Europe/Mediterranean Sea |  |  | (1,497 | ) |  |  | (12,680 | ) |  |  | (26,733 | )
West Africa |  |  | 2,308 |  |  |  | (8,828 | ) |  |  | (24,662 | )
|  |  | (337 | ) |  |  | (45,491 | ) |  |  | (57,832 | )
Other operating profit (loss) |  |  | 1,614 |  |  |  | 876 |  |  |  | (1,548 | )
|  |  | 1,277 |  |  |  | (44,615 | ) |  |  | (59,380 | )
Corporate general and administrative expenses (A) |  |  | (14,823 | ) |  |  | (17,542 | ) |  |  | (55,389 | )
Corporate depreciation |  |  | (166 | ) |  |  | (704 | ) |  |  | (2,456 | )
Corporate expenses |  |  | (14,989 | ) |  |  | (18,246 | ) |  |  | (57,845 | )
Gain on asset dispositions, net |  |  | 6,616 |  |  |  | 3,561 |  |  |  | 24,099 |
Asset impairments |  |  | (16,777 | ) |  |  | (184,748 | ) |  |  | (484,727 | )
Operating loss |  |  | (23,873 | ) |  |  | (244,048 | ) |  |  | (577,853 | )
Foreign exchange loss |  |  | (407 | ) |  |  | (3,181 | ) |  |  | (1,638 | )
Equity in net earnings of unconsolidated companies |  |  | 2,130 |  |  |  | 4,786 |  |  |  | 5,710 |
Interest income and other, net |  |  | 2,771 |  |  |  | 2,384 |  |  |  | 5,193 |
Reorganization items |  |  | (4,299 | ) |  |  | (1,396,905 | ) |  |  | — |
Interest and other debt costs |  |  | (13,009 | ) |  |  | (11,179 | ) |  |  | (75,026 | )
Loss before income taxes |  | $ | (36,687 | ) |  |  | (1,648,143 | ) |  |  | (643,614 | )
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 5,767 |  |  |  | 13,945 |  |  |  | 48,814 |
Middle East/Asia Pacific |  |  | 4,716 |  |  |  | 9,967 |  |  |  | 40,849 |
Europe/Mediterranean Sea |  |  | 2,794 |  |  |  | 9,060 |  |  |  | 26,538 |
West Africa |  |  | 6,067 |  |  |  | 12,632 |  |  |  | 44,204 |
|  |  | 19,344 |  |  |  | 45,604 |  |  |  | 160,405 |
Other |  |  | 827 |  |  |  | 1,139 |  |  |  | 4,430 |
Corporate |  |  | 166 |  |  |  | 704 |  |  |  | 2,456 |
|  | $ | 20,337 |  |  |  | 47,447 |  |  |  | 167,291 |
Additions to properties and equipment: |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 144 |  |  |  | 27 |  |  |  | 93 |
Middle East/Asia Pacific |  |  | 2,596 |  |  |  | 1,042 |  |  |  | 1,612 |
Europe/Mediterranean Sea |  |  | — |  |  |  | — |  |  |  | — |
West Africa |  |  | 195 |  |  |  | 375 |  |  |  | 743 |
|  |  | 2,935 |  |  |  | 1,444 |  |  |  | 2,448 |
Corporate |  |  | 6,899 |  |  |  | 821 |  |  |  | 28,099 |
|  | $ | 9,834 |  |  |  | 2,265 |  |  |  | 30,547 |
Total assets (B): |  |  |  |  |  |  |  |  |  |  |  |
Americas |  | $ | 164,958 |  |  |  | 714,891 |  |  |  | 779,778 |
Middle East/Asia Pacific |  |  | 48,268 |  |  |  | 424,896 |  |  |  | 583,385 |
Europe/Mediterranean Sea |  |  | 171,157 |  |  |  | 597,819 |  |  |  | 588,519 |
West Africa |  |  | 864,299 |  |  |  | 1,277,552 |  |  |  | 1,308,836 |
|  |  | 1,248,682 |  |  |  | 3,015,158 |  |  |  | 3,260,518 |
Other |  |  | 2,443 |  |  |  | 20,392 |  |  |  | 21,580 |
|  |  | 1,251,125 |  |  |  | 3,035,550 |  |  |  | 3,282,098 |
Investments in and advances to unconsolidated companies |  |  | 29,216 |  |  |  | 49,367 |  |  |  | 45,115 |
|  |  | 1,280,341 |  |  |  | 3,084,917 |  |  |  | 3,327,213 |
Corporate (C) |  |  | 465,839 |  |  |  | 799,752 |  |  |  | 863,486 |
|  | $ | 1,746,180 |  |  |  | 3,884,669 |  |  |  | 4,190,699 |
(A) | Restructuring-related professional services costs for the five month period from August 1, 2017 through December 31, 2017 are included in reorganization items. Included in corporate general and administrative expenses for the period four month period April 1, 2017 through July 31, 2017 (Predecessor) and year ended March 31, 2017 (Predecessor) were $6.7 million and $29 million of restructuring-related professional service costs, respectively.
(B) | Marine support services are conducted worldwide with assets that are highly mobile. Revenues are principally derived from offshore service vessels, which regularly and routinely move from one operating area to another, often to and from offshore operating areas in different continents. Because of this asset mobility, revenues and long-lived assets attributable to the company’s international marine operations in any one country are not material.
(C) | Included in Corporate are vessels currently under construction which had not yet been assigned to a non-corporate reporting segment. The vessel construction costs will be reported in Corporate until the earlier of the vessels being assigned to a non-corporate reporting segment or the vessels’ delivery. At December 31, 2017 (Successor), July 31, 2017 (Predecessor) and March 31, 2017 (Predecessor), was $9.3 million, $47.5 million and $52.4 million, respectively, of vessel construction costs were included in Corporate.
Schedule of Segment Reporting Information, Revenue by Vessel Class | The following table compares revenue by segment, and in total for the worldwide fleet, along with the respective percentage of total vessel revenue for the quarters and six month periods ended June 30, 2018 (Successor) and June 30, 2017 (Predecessor):
|  | Successor |  |  | Predecessor |  |  |  |  |  | Successor |  |  |  |  |  | Predecessor |
|  | Quarter Ended June 30, 2018 |  |  | Quarter Ended June 30, 2017 |  |  |  |  |  | Six Months Ended June 30, 2018 |  |  |  |  |  | Six Months Ended June 30, 2017 |
Vessel revenue by vessel class (In thousands) |  | % of Vessel Revenue |  |  | % of Vessel Revenue |  |  |  |  |  | % of Vessel Revenue |  |  |  |  |  | % of Vessel Revenue |
Americas fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 22,661 |  |  |  | 22 | % |  |  |  |  |  |  | 17,313 |  |  |  | 15 | % |  |  |  |  |  | $ | 38,866 |  |  |  | 20 | % |  |  |  |  |  |  | 80,144 |  |  |  | 30 | %
Towing-supply |  |  | 7,560 |  |  |  | 7 | % |  |  |  |  |  |  | 11,274 |  |  |  | 10 | % |  |  |  |  |  |  | 14,406 |  |  |  | 8 | % |  |  |  |  |  |  | 26,012 |  |  |  | 10 | %
Other |  |  | 2,380 |  |  |  | 2 | % |  |  |  |  |  |  | 3,300 |  |  |  | 3 | % |  |  |  |  |  |  | 5,410 |  |  |  | 3 | % |  |  |  |  |  |  | 6,264 |  |  |  | 2 | %
Total |  | $ | 32,601 |  |  |  | 31 | % |  |  |  |  |  |  | 31,887 |  |  |  | 28 | % |  |  |  |  |  | $ | 58,682 |  |  |  | 31 | % |  |  |  |  |  |  | 112,420 |  |  |  | 42 | %
Middle East/Asia Pacific fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 9,603 |  |  |  | 9 | % |  |  |  |  |  |  | 10,701 |  |  |  | 10 | % |  |  |  |  |  | $ | 19,167 |  |  |  | 10 | % |  |  |  |  |  |  | 20,134 |  |  |  | 7 | %
Towing-supply |  |  | 12,783 |  |  |  | 12 | % |  |  |  |  |  |  | 17,065 |  |  |  | 15 | % |  |  |  |  |  |  | 21,607 |  |  |  | 11 | % |  |  |  |  |  |  | 34,310 |  |  |  | 13 | %
Other |  |  | 20 |  |  |  | <1 | % |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |  |  |  | 20 |  |  |  | <1 | % |  |  |  |  |  |  | — |  |  |  | — |
Total |  | $ | 22,406 |  |  |  | 21 | % |  |  |  |  |  |  | 27,766 |  |  |  | 25 | % |  |  |  |  |  | $ | 40,794 |  |  |  | 21 | % |  |  |  |  |  |  | 54,444 |  |  |  | 20 | %
Europe/Mediterranean Sea fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 12,596 |  |  |  | 12 | % |  |  |  |  |  |  | 8,237 |  |  |  | 8 | % |  |  |  |  |  | $ | 21,616 |  |  |  | 11 | % |  |  |  |  |  |  | 18,090 |  |  |  | 7 | %
Towing-supply |  |  | 761 |  |  |  | 1 | % |  |  |  |  |  |  | 2,794 |  |  |  | 2 | % |  |  |  |  |  |  | 1,364 |  |  |  | 1 | % |  |  |  |  |  |  | 3,116 |  |  |  | 1 | %
Other |  |  | — |  |  |  | — |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  |  |  |  |  | (9 | ) |  |  | (<1 | %)
Total |  | $ | 13,357 |  |  |  | 13 | % |  |  |  |  |  |  | 11,031 |  |  |  | 10 | % |  |  |  |  |  | $ | 22,980 |  |  |  | 12 | % |  |  |  |  |  |  | 21,197 |  |  |  | 8 | %
West Africa fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 14,314 |  |  |  | 14 | % |  |  |  |  |  |  | 13,921 |  |  |  | 12 | % |  |  |  |  |  | $ | 28,252 |  |  |  | 15 | % |  |  |  |  |  |  | 27,100 |  |  |  | 10 | %
Towing-supply |  |  | 17,321 |  |  |  | 17 | % |  |  |  |  |  |  | 24,225 |  |  |  | 22 | % |  |  |  |  |  |  | 33,460 |  |  |  | 17 | % |  |  |  |  |  |  | 46,697 |  |  |  | 17 | %
Other |  |  | 4,175 |  |  |  | 4 | % |  |  |  |  |  |  | 3,427 |  |  |  | 3 | % |  |  |  |  |  |  | 7,500 |  |  |  | 4 | % |  |  |  |  |  |  | 7,304 |  |  |  | 3 | %
Total |  | $ | 35,810 |  |  |  | 35 | % |  |  |  |  |  |  | 41,573 |  |  |  | 37 | % |  |  |  |  |  | $ | 69,212 |  |  |  | 36 | % |  |  |  |  |  |  | 81,101 |  |  |  | 30 | %
Worldwide fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 59,174 |  |  |  | 57 | % |  |  |  |  |  |  | 50,172 |  |  |  | 45 | % |  |  |  |  |  | $ | 107,901 |  |  |  | 56 | % |  |  |  |  |  |  | 145,468 |  |  |  | 54 | %
Towing-supply |  |  | 38,425 |  |  |  | 37 | % |  |  |  |  |  |  | 55,358 |  |  |  | 49 | % |  |  |  |  |  |  | 70,837 |  |  |  | 37 | % |  |  |  |  |  |  | 110,135 |  |  |  | 41 | %
Other |  |  | 6,575 |  |  |  | 6 | % |  |  |  |  |  |  | 6,727 |  |  |  | 6 | % |  |  |  |  |  |  | 12,930 |  |  |  | 7 | % |  |  |  |  |  |  | 13,559 |  |  |  | 5 | %
Total |  | $ | 104,174 |  |  |  | 100 | % |  |  |  |  |  |  | 112,257 |  |  |  | 100 | % |  |  |  |  |  | $ | 191,668 |  |  |  | 100 | % |  |  |  |  |  |  | 269,162 |  |  |  | 100 | %
| The following table discloses the amount of revenue by segment, and in total for the worldwide fleet, along with the respective percentage of total vessel revenue:
|  | Successor |  |  | Predecessor |
|  | Period from August 1, 2017 through December 31, 2017 |  |  | Period from April 1, 2017 through July 31, 2017 |  |  | Year Ended March 31, 2017 |
Revenue by vessel class: (In thousands): |  |  |  |  | % of Vessel Revenue |  |  |  |  |  | % of Vessel Revenue |  |  |  |  |  | % of Vessel Revenue |
Americas fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 26,860 |  |  |  | 16 | % |  |  | 21,617 |  |  |  | 15 | % |  |  | 171,334 |  |  |  | 29 | %
Towing-supply |  |  | 13,835 |  |  |  | 8 | % |  |  | 15,021 |  |  |  | 10 | % |  |  | 56,561 |  |  |  | 10 | %
Other |  |  | 5,089 |  |  |  | 3 | % |  |  | 4,210 |  |  |  | 3 | % |  |  | 11,948 |  |  |  | 2 | %
Total |  | $ | 45,784 |  |  |  | 27 | % |  |  | 40,848 |  |  |  | 28 | % |  |  | 239,843 |  |  |  | 41 | %
Middle East/Asia Pacific fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 14,792 |  |  |  | 9 | % |  |  | 13,368 |  |  |  | 9 | % |  |  | 35,526 |  |  |  | 6 | %
Towing-supply |  |  | 25,053 |  |  |  | 14 | % |  |  | 22,945 |  |  |  | 16 | % |  |  | 79,092 |  |  |  | 13 | %
Other |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 39,845 |  |  |  | 23 | % |  |  | 36,313 |  |  |  | 25 | % |  |  | 114,618 |  |  |  | 19 | %
Europe/Mediterranean Sea fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 18,204 |  |  |  | 10 | % |  |  | 11,620 |  |  |  | 8 | % |  |  | 39,492 |  |  |  | 7 | %
Towing-supply |  |  | 1,691 |  |  |  | 1 | % |  |  | 3,846 |  |  |  | 3 | % |  |  | 2,659 |  |  |  | 1 | %
Other |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 516 |  |  |  | <1 | %
Total |  | $ | 19,895 |  |  |  | 11 | % |  |  | 15,466 |  |  |  | 11 | % |  |  | 42,667 |  |  |  | 8 | %
West Africa fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 24,131 |  |  |  | 13 | % |  |  | 18,126 |  |  |  | 12 | % |  |  | 62,882 |  |  |  | 11 | %
Towing-supply |  |  | 33,806 |  |  |  | 20 | % |  |  | 31,297 |  |  |  | 21 | % |  |  | 100,073 |  |  |  | 17 | %
Other |  |  | 8,423 |  |  |  | 5 | % |  |  | 4,547 |  |  |  | 3 | % |  |  | 23,733 |  |  |  | 4 | %
Total |  | $ | 66,360 |  |  |  | 39 | % |  |  | 53,970 |  |  |  | 36 | % |  |  | 186,688 |  |  |  | 32 | %
Worldwide fleet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater |  | $ | 83,987 |  |  |  | 49 | % |  |  | 64,731 |  |  |  | 44 | % |  |  | 309,234 |  |  |  | 53 | %
Towing-supply |  |  | 74,385 |  |  |  | 43 | % |  |  | 73,109 |  |  |  | 50 | % |  |  | 238,385 |  |  |  | 41 | %
Other |  |  | 13,512 |  |  |  | 8 | % |  |  | 8,757 |  |  |  | 6 | % |  |  | 36,197 |  |  |  | 6 | %
Total |  | $ | 171,884 |  |  |  | 100 | % |  |  | 146,597 |  |  |  | 100 | % |  |  | 583,816 |  |  |  | 100 | %
Entity Wide Major Customer Amount |  | The following table discloses our customers that accounted for 10% or more of total revenues:
|  | Successor |  |  | Predecessor |
|  | Period from August 1, 2017 through December 31, 2017 |  |  | Period from April 1, 2017 through July 31, 2017 |  |  | Year Ended March 31, 2017 |
Chevron Corporation |  |  | 17.4 | % |  |  | 17.5 | % |  |  | 16.3 | %
Freeport McMoRan (A) |  |  | — |  |  |  | — |  |  |  | 11.3 | %
Saudi Aramco |  |  | 10.1 | % |  |  | 11.7 | % |  |  | 10.0 | %
(A) | A significant portion of this customer’s year ended March 31, 2017 revenue was the result of the early termination of a long-term vessel charter contract.
Comparison of Total Assets | The following table provides a comparison of total assets at June 30, 2018 and December 31, 2017:
(In thousands) |  | June 30, 2018 |  |  | December 31, 2017 |
Total assets (A): |  |  |  |  |  |  |  |
Americas (B) |  | $ | 310,121 |  |  |  | 164,958 |
Middle East/Asia Pacific |  |  | 215,105 |  |  |  | 48,268 |
Europe/Mediterranean Sea |  |  | 167,695 |  |  |  | 171,157 |
West Africa (C) |  |  | 486,333 |  |  |  | 864,299 |
|  |  | 1,179,254 |  |  |  | 1,248,682 |
Other |  |  | 363 |  |  |  | 2,443 |
|  |  | 1,179,617 |  |  |  | 1,251,125 |
Investments in, at equity, and advances to unconsolidated companies |  |  | 1,335 |  |  |  | 29,216 |
|  |  | 1,180,953 |  |  |  | 1,280,341 |
Corporate (D) |  |  | 462,589 |  |  |  | 465,839 |
|  | $ | 1,643,542 |  |  |  | 1,746,180 |
(A) | The company’s segment level assets as of June 30, 2018, reflect the elimination of certain intersegment balances.
(B) | Americas segment assets include cash held by non-corporate subsidiaries of $94.6 million and 95.1 million, as of June 30, 2018 and December 31, 2017, respectively.
(C) | West Africa segment assets include due from related parties of $197.1 million and $263.7 million as of June 30, 2018 and December 31, 2017, respectively.
(D) | Corporate includes cash (including restricted cash) of $353.2 million and $336.4 million as of June 30, 2018 and December 31. 2017, respectively. Also included in Corporate is a vessel under construction which has not yet been assigned to a non-corporate reporting segment. A vessel’s construction costs are reported in Corporate until the earlier of the date the vessel is assigned to a non-corporate reporting segment or the date it is delivered. At June 30, 2018 and December 31, 2017, $11.2 million and $9.3 million, respectively, of vessel construction costs are included in Corporate.

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