XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Schedule of Vessel Commitments (Detail) $ in Thousands | 1 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2015 USD ($) Vessel | Dec. 31, 2016 USD ($) Vessel
Vessel Commitments |  |  |  |
Significant Purchase and Supply Commitment [Line Items] |  |  |  |
Number of Vessels, commitments | Vessel |  |  | 3 |
Total cost, commitments |  |  | $ 164,279 |
Invested, commitments |  |  | 117,624 |
Remaining Balance, commitments |  |  | $ 46,655 |
Deepwater PSVs |  |  |  |
Significant Purchase and Supply Commitment [Line Items] |  |  |  |
Number of vessels under construction | Vessel |  | 2 | 3 | [1]
Total cost, under construction | [1] |  | $ 164,279 |
Invested, under construction |  | $ 5,400 | 117,624 | [1]
Remaining Balance, under construction | [1] |  | $ 46,655 |
[1] | two remaining 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: |