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ASSET IMPAIRMENTS (Tables) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Asset Impairment Charges [Abstract] |  |
Summary of Vessels and ROVs Impaired, Amount of Impairment Incurred and Combined Fair Value of Assets after Impairment Charges | The below table summarizes the number of vessels impaired and the amount of the impairment incurred during the quarters and six month periods ended June 30, 2018 and 2017.
|  | Successor |  |  |  |  |  | Predecessor |  |  |  |  |  | Successor |  |  |  |  |  | Predecessor |
(In thousands, except number of vessels impaired) |  | Quarter Ended June 30, 2018 |  |  |  |  |  | Quarter Ended June 30, 2017 |  |  |  |  |  | Six Months Ended June 30, 2018 |  |  |  |  |  | Six Months Ended June 30, 2017 |
Number of vessels impaired in the period (A) |  |  | 2 |  |  |  |  |  |  |  | 77 |  |  |  |  |  |  |  | 15 |  |  |  |  |  |  |  | 89 |
Amount of impairment incurred |  | $ | 1,215 |  |  |  |  |  |  |  | 163,423 |  |  |  |  |  |  |  | 7,401 |  |  |  |  |  |  |  | 228,280 |
(A) | For the quarter and six months periods ended June 30, 2018, there were 2 and 15 stacked vessels impaired, respectively. For the quarter ended June 30, 2017, there were 72 stacked vessels and 5 active vessels impaired, respectively and for the six month period ended June 30, 2017 there were 83 stacked vessels and 6 active vessels impaired, respectively.
| 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 |
(In thousands) |  | Period from August 1, 2017 through December 31, 2017 |  |  | Period from April 1, 2017 through July 31, 2017 |  |  | Year Ended March 31, 2017 |
Number of vessels impaired during the period |  |  | 5 |  |  |  | 79 |  |  |  | 132 |
Number of ROVs impaired during the period |  |  | — |  |  |  | — |  |  |  | 8 |
Amount of impairment incurred (A) |  | $ | 16,777 |  |  |  | 184,748 |  |  |  | 484,727 |
Combined fair value of assets incurring impairment after having recorded impairment charges |  |  | 8,763 |  |  |  | 571,821 |  |  |  | 933,068 |
(A) | The period August 1, 2017 through December 31, 2017 and the year ended March 31, 2017 included $2.3 million and $2.2 million, respectively, of impairments related to inventory and other non-vessel assets.

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