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Summary of Combined Fair Value of Assets Incurred Impairments (Parenthetical) (Detail) - Vessel | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Schedule of Combined Fair Value of Assets that Incurred Impairments [Line Items] |  |  |
Number of vessels impaired in the period | [1] | 13 |
Stacked Vessels |  |  |
Schedule of Combined Fair Value of Assets that Incurred Impairments [Line Items] |  |  |
Number of vessels impaired in the period |  | 13 |
Predecessor |  |  |
Schedule of Combined Fair Value of Assets that Incurred Impairments [Line Items] |  |  |
Number of vessels impaired in the period | [1] |  | 28
Predecessor | Stacked Vessels |  |  |
Schedule of Combined Fair Value of Assets that Incurred Impairments [Line Items] |  |  |
Number of vessels impaired in the period |  |  | 25
Predecessor | Active Vessels |  |  |
Schedule of Combined Fair Value of Assets that Incurred Impairments [Line Items] |  |  |
Number of vessels impaired in the period |  |  | 3
[1] | For the quarter ended March 31, 2018, there were 13 stacked vessels impaired, and for the quarter ended March 31, 2017, there were 25 stacked vessels and 3 active vessels impaired.

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- Definition Schedule of combined fair value of assets that incurred impairments. + References No definition available. + Details
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- Details
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