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Schedule of Segment Reporting Information, Revenue by Vessel (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Segment Reporting Information [Line Items] |  |
Vessel revenues | $ 87,494 |
Predecessor |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues |  | $ 156,905
Americas |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues | 26,081 |
Americas | Predecessor |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues |  | 80,533
Middle East/Asia Pacific |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues | 18,388 |
Middle East/Asia Pacific | Predecessor |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues |  | 26,678
Europe/Mediterranean Sea |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues | 9,623 |
Europe/Mediterranean Sea | Predecessor |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues |  | 10,166
West Africa |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues | $ 33,402 |
West Africa | Predecessor |  |
Segment Reporting Information [Line Items] |  |
Vessel revenues |  | $ 39,528

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