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

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- Definition

Significant purchase commitment, vessels to acquire

+ References

No definition available.

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