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COMMITMENTS AND CONTINGENCIES (Tables) | 6 Months Ended
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Sep. 30, 2016
Commitments And Contingencies Disclosure [Abstract] |
Schedule of Vessel Commitments to Acquire and Construct New Vessels and ROVs, by Vessel Type | The table below summarizes the company’s various vessel commitments to acquire and construct new vessels, by vessel type, as of September 30, 2016:
|  | Number |  |  |  |  |  |  | Invested |  |  | Remaining |
|  | of |  |  | Total |  |  | Through |  |  | Balance |
(In thousands, except vessel count) |  | Vessels |  |  | Cost |  |  | 9/30/16 |  |  | 9/30/16 |
Vessels under construction (A): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater PSVs |  |  | 3 |  |  | $ | 163,657 |  |  |  | 115,683 |  |  |  | 47,974 |
Total vessel commitments (B) |  |  | 3 |  |  | $ | 163,657 |  |  |  | 115,683 |  |  |  | 47,974 |
| (A) | Six additional option vessels and a fast supply boat are not included in the table above.
| (B) | The company is entitled to receive a refund of prior shipyard payments totaling $14.3 million which would reduce the remaining balance of vessel commitments. See further discussion below.

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- Definition Tabular disclosure of arrangements in which the entity has agreed to acquire or construct assets. May include identification of assets to be acquired or constructed, pricing, effects on pricing, cancellation rights, and termination provisions. + References No definition available. + Details
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