XML 145 R131.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Schedule of Vessel Commitments (Detail) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 Vessel | Apr. 30, 2015 Vessel | Mar. 31, 2016 USD ($) Vessel | May. 31, 2015 USD ($)
Significant Purchase and Supply Commitment [Line Items] |  |  |  |  |  |
Number of Vessels, commitments | Vessel |  |  |  | 6 |  |
Number of vessels under construction | Vessel |  | 9 |  |  |  |
Vessel Commitments |  |  |  |  |  |
Significant Purchase and Supply Commitment [Line Items] |  |  |  |  |  |
Number of Vessels, commitments | Vessel | [1] |  |  | 6 |  |
Total cost, commitments | [1] |  |  | $ 251,420 |  |
Invested, commitments | [1] |  |  | 183,904 |  |
Remaining Balance, commitments | [1] |  |  | $ 67,516 |  |
Deepwater PSVs |  |  |  |  |  |
Significant Purchase and Supply Commitment [Line Items] |  |  |  |  |  |
Number of vessels under construction | Vessel |  | 6 | 2 | 6 | [1] |
Total cost, under construction | [1] |  |  | $ 251,420 |  |
Invested, under construction |  |  |  | 183,904 | [1] | $ 5,400
Remaining Balance, under construction | [1] |  |  | $ 67,516 |  |
[1] | (A) Six additional option vessels and a fast supply boat are not included in the table above.

X
- Definition Commitments, remaining expenditures. + References No definition available. + Details
Name: | tdw_CommitmentsRemainingExpenditures
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Significant commitment cost of vessel under construction. + References No definition available. + Details
Name: | tdw_SignificantCommitmentCostOfVesselUnderConstruction
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Significant commitment number of vessel. + References No definition available. + Details
Name: | tdw_SignificantCommitmentNumberOfVessel
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Significant commitment progress payments invested through the period. + References No definition available. + Details
Name: | tdw_SignificantCommitmentProgressPaymentsInvestedThroughPeriod
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Significant commitment remaining balance of vessel under construction. + References No definition available. + Details
Name: | tdw_SignificantCommitmentRemainingBalanceOfVesselUnderConstruction
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Significant commitments cost. + References No definition available. + Details
Name: | tdw_SignificantCommitmentsCost
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Significant commitments, new construction. + References No definition available. + Details
Name: | tdw_SignificantCommitmentsNewConstruction
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Significant commitments, new construction progress payments invested. + References No definition available. + Details
Name: | tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Significant Purchase and Supply Commitment [Line Items] + References No definition available. + Details
Name: | tdw_SignificantPurchaseAndSupplyCommitmentLineItems
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=tdw_VesselCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=tdw_DeepwaterPlatformSupplyVesselsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |