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Schedule of Segment Reporting Information, Revenue by Vessel (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ 105,601 |  | $ 197,094 |
Vessel Revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 104,174 |  | 191,668 |
Vessel Revenues | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 32,601 |  | 58,682 |
Vessel Revenues | Middle East/Asia Pacific |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 22,406 |  | 40,794 |
Vessel Revenues | Europe/Mediterranean Sea |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | 13,357 |  | 22,980 |
Vessel Revenues | West Africa |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues | $ 35,810 |  | $ 69,212 |
Predecessor |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | $ 115,106 |  | $ 275,855
Predecessor | Vessel Revenues |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | 112,257 |  | 269,162
Predecessor | Vessel Revenues | Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | 31,887 |  | 112,420
Predecessor | Vessel Revenues | Middle East/Asia Pacific |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | 27,766 |  | 54,444
Predecessor | Vessel Revenues | Europe/Mediterranean Sea |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | 11,031 |  | 21,197
Predecessor | Vessel Revenues | West Africa |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  | $ 41,573 |  | $ 81,101

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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