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ASSET IMPAIRMENTS (Tables) | 9 Months Ended
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Dec. 31, 2016
Asset Impairment Charges [Abstract] |
Summary of Combined Fair Value of Assets Incurred Impairments | The table below summarizes the combined fair value of the assets that incurred impairments during the quarters and nine-month periods ended December 31, 2016 and 2015, along with the amount of impairment.
|  | Quarter Ended |  |  | Nine Months Ended |
|  | December 31, |  |  | December 31, |
(In thousands) |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Number of vessels impaired during the period |  |  | 74 |  |  |  | 14 |  |  |  | 115 |  |  |  | 47 |
Number of ROVs impaired during the period |  |  | — |  |  |  | — |  |  |  | 8 |  |  |  | — |
Amount of impairment incurred |  | $ | 253,422 |  |  |  | 15,141 |  |  |  | 419,870 |  |  |  | 61,771 |
Combined fair value of assets incurring impairment |  |  | 523,495 |  |  |  | 90,010 |  |  |  | 813,851 |  |  |  | 244,310 |

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