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Commitments and Contingencies (Tables) | 9 Months Ended
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Dec. 31, 2014
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 and ROVs, by vessel type, as of December 31, 2014:
(In thousands, except vessel count) |  | Number of Vessels/ROVs |  |  | Total Cost |  |  |  | Invested Through 12/31/14 |  |  |  | Remaining Balance 12/31/14 |
Vessels under construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deepwater PSVs |  | 21 |  | $ | 713,903 |  |  |  | 258,460 |  |  |  | 455,443 |
Towing-supply vessels |  | 6 |  |  | 112,284 |  |  |  | 64,542 |  |  |  | 47,742 |
Other |  | 1 |  |  | 8,014 |  |  |  | 8,014 |  |  |  | — |
Total vessel commitments |  | 28 |  |  | 834,201 |  |  |  | 331,016 |  |  |  | 503,185 |
Total ROV commitments |  | 2 |  |  | 13,640 |  |  |  | 12,940 |  |  |  | 700 |
Total commitments |  | 30 |  | $ | 847,841 |  |  |  | 343,956 |  |  |  | 503,885 |

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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
Name: | tdw_VesselConstructionAndAcquisitionCommitmentTableTextBlock
Namespace Prefix: | tdw_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration