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Commitments and Contingencies (Merchant Navy Officers Pension Fund) - Additional Information (Detail) (Merchant Navy Officers Pension Fund) | 0 Months Ended
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Jul. 15, 2013 Vessel
Merchant Navy Officers Pension Fund |
Commitments and Contingencies Disclosure [Line Items] |
Number of Vessels to be purchased | 7 tdw_SignificantPurchaseCommitmentVesselsToAcquire / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = tdw_MerchantNavyOfficersPensionFundMember

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- Details
Name: | tdw_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Significant purchase commitment, vessels to acquire + References No definition available. + Details
Name: | tdw_SignificantPurchaseCommitmentVesselsToAcquire
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration