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Status of Discussions With Lenders and Noteholders / Audit Opinion - Additional Information (Detail) | Mar. 31, 2016
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Minimum |
Status Of Discussions With Lenders And Noteholders Audit Opinion [Line Items] |
Interest coverage ratio | 300.00%

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- Definition Interest Coverage ratio + References No definition available. + Details
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Namespace Prefix: | tdw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Status of discussions with lenders and noteholders audit opinion. + References No definition available. + Details
Name: | tdw_StatusOfDiscussionsWithLendersAndNoteholdersAuditOpinionLineItems
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |