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ASSET IMPAIRMENTS (Tables) | 12 Months Ended
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Dec. 31, 2018
Asset Impairment Charges [Abstract] |
Summary of Vessels and ROVs Impaired, Amount of Impairment Incurred and Combined Fair Value of Assets after Impairment Charges | The table below summarizes the number of vessels and ROVs impaired, the amount of impairment incurred and the combined fair value of the assets after having recorded the impairment charges.
|  | Successor |  |  |  | Predecessor |
|  |  |  |  |  | Period from |  |  |  | Period from |  |  |  |  |
|  | Twelve Months |  |  | August 1, 2017 |  |  |  | April 1, 2017 |  |  | Twelve Months |
|  | Ended |  |  | through |  |  |  | through |  |  | Ended |
(In thousands) |  | December 31, 2018 |  |  | December 31, 2017 |  |  |  | July 31, 2017 |  |  | March 31, 2017 |
Number of vessels impaired during the period |  |  | 56 |  |  |  | 5 |  |  |  |  | 79 |  |  |  | 132 |
Number of ROVs impaired during the period |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | 8 |
Amount of impairment incurred (A) |  | $ | 61,132 |  |  | $ | 16,777 |  |  |  |  | 184,748 |  |  |  | 484,727 |
| (A) | The twelve months ended December 31, 2018, the period August 1, 2017 through December 31, 2017 and the twelve months ended March 31, 2017 included $3.5 million, $2.3 million and $2.2 million respectively, of impairments related to inventory and other non-vessel assets. There were no impairments to non-vessel assets during the period April 1, 2017 through July 31, 2017.

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