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Segment Information, Geographical Data and Major Customers (Detail) - USD ($) $ in Thousands | 1 Months Ended | 2 Months Ended | 3 Months Ended | 4 Months Ended | 5 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Jul. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | $ 151,369 | $ 178,753 | $ 486,549 | $ 406,520
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (44,615) | 1,277 | 6,894 | 6,066
Corporate expenses |  |  |  |  |  |  |  |  |  |  |  |  | (18,246) | (14,989) | (57,988) | (42,972)
Gain on asset dispositions, net |  |  |  |  |  |  |  |  |  |  |  |  | 3,561 | 6,616 | 2,263 | 10,624
Impairment of due from affiliate |  |  |  |  |  |  | $ (20,083) |  |  |  |  |  |  |  |  | (20,083)
Asset impairments and other | $ (21,325) |  | $ (32,549) | $ (5,224) |  |  | (36,878) | $ (16,853) | $ (1,215) | $ (6,186) | $ (16,777) | $ (163,423) | (184,748) | (16,777) | (37,773) | (61,132)
Operating loss | (38,674) | $ (5,782) | (50,039) | $ (22,551) | $ (4,394) | $ (9,620) | (70,077) | $ (25,086) | $ (140) | $ (12,194) | (18,091) | $ (205,374) | (244,048) | (23,873) | (86,604) | (107,497)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 47,447 | 20,337 | 101,931 | 58,293
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  | 2,265 | 9,834 | 17,998 | 21,391
Total assets | 3,884,669 |  | 1,579,528 |  |  |  | 1,827,739 |  |  |  | 1,759,595 |  | 3,884,669 | 1,759,595 | 1,579,528 | 1,827,739
Investments in, at equity, and advances to unconsolidated companies | 49,367 |  |  |  |  |  | 1,039 |  |  |  | 29,216 |  | 49,367 | 29,216 |  | 1,039
All Other Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  | 876 | 1,614 | 6,734 | 3,742
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 1,139 | 827 |  | 21
Total assets | 20,392 |  |  |  |  |  | 7,440 |  |  |  | 2,443 |  | 20,392 | 2,443 |  | 7,440
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (45,491) | (337) | 160 | 2,324
Operating Segments | Americas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (22,549) | (1,599) | (805) | 8,860
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 13,945 | 5,767 | 27,493 | 16,047
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  | 27 | 144 | 969 | 3,771
Total assets | 714,891 |  | 375,297 |  |  |  | 380,168 |  |  |  | 164,958 |  | 714,891 | 164,958 | 375,297 | 380,168
Operating Segments | Middle East/Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (1,434) | 451 | (6,044) | (4,417)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 9,967 | 4,716 | 21,440 | 11,871
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  | 1,042 | 2,596 | 5,237 | 2,982
Total assets | 424,896 |  | 270,413 |  |  |  | 233,611 |  |  |  | 48,268 |  | 424,896 | 48,268 | 270,413 | 233,611
Operating Segments | Europe/Mediterranean |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (12,680) | (1,497) | (1,289) | (9,359)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 9,060 | 2,794 | 30,053 | 11,385
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,001 | 185
Total assets | 597,819 |  | 358,943 |  |  |  | 316,524 |  |  |  | 171,156 |  | 597,819 | 171,156 | 358,943 | 316,524
Operating Segments | West Africa Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (8,828) | 2,308 | 8,298 | 7,240
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 12,632 | 6,067 | 21,166 | 16,612
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  | 375 | 195 | 2,721 | 10,135
Total assets | 1,277,552 |  | 376,087 |  |  |  | 483,234 |  |  |  | 864,300 |  | 1,277,552 | 864,300 | 376,087 | 483,234
Corporate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  | 704 | 166 | 1,779 | 2,357
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  | 821 | 6,899 | 5,070 | 4,318
Total assets | $ 799,752 |  | $ 198,788 |  |  |  | $ 405,723 |  |  |  | $ 479,254 |  | 799,752 | 479,254 | 198,788 | 405,723
Service | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 146,597 | 171,884 | 477,015 | 397,206
Service | Operating Segments | Americas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 40,848 | 45,784 | 136,958 | 118,534
Service | Operating Segments | Middle East/Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 36,313 | 39,845 | 90,321 | 80,195
Service | Operating Segments | Europe/Mediterranean |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 15,466 | 19,895 | 123,711 | 56,263
Service | Operating Segments | West Africa Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | 53,970 | 66,360 | 126,025 | 142,214
Other Operating Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,772 | $ 6,869 | $ 9,534 | $ 9,314

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