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ASSET IMPAIRMENTS (Tables) | 6 Months Ended
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Sep. 30, 2016
Asset Impairment Charges [Abstract] |
Summary of Combined Fair Value of Assets Incurred Impairments | The below table summarizes the combined fair value of the assets that incurred impairments during the quarters and six-month periods ended September 30, 2016 and 2015, along with the amount of impairment.
|  | Quarter Ended |  |  | Six Months Ended |
|  | September 30, |  |  | September 30, |
(In thousands) |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Number of vessels impaired during the period |  |  | 42 |  |  |  | 19 |  |  |  | 54 |  |  |  | 33 |
Number of ROVs impaired during the period |  |  | 8 |  |  |  | — |  |  |  | 8 |  |  |  | — |
Amount of impairment incurred |  | $ | 129,562 |  |  |  | 31,672 |  |  |  | 166,448 |  |  |  | 46,630 |
Combined fair value of assets incurring impairment |  |  | 322,550 |  |  |  | 107,445 |  |  |  | 477,950 |  |  |  | 154,300 |

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