XML 71 R57.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Schedule of Vessel Commitments (Parenthetical) (Detail) $ in Thousands | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) Vessel | Sep. 30, 2015 USD ($)
Significant Purchase and Supply Commitment [Line Items] |  |  |
Refunds from cancelled vessel construction contracts |  | $ 43,000 | $ 31,000
Refunds from cancelled vessel construction contracts |  | $ 36,190 |
Option Agreement |  |  |
Significant Purchase and Supply Commitment [Line Items] |  |  |
Number of vessels under construction | Vessel |  | 6 |
Subsequent Event |  |  |
Significant Purchase and Supply Commitment [Line Items] |  |  |
Refunds from cancelled vessel construction contracts | $ 12,000 |  |

X
- Definition Proceeds From Refunds From Cancelled Vessel Construction Contracts + References No definition available. + Details
Name: | tdw_ProceedsFromRefundsFromCancelledVesselConstructionContracts
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Refunds from cancelled vessel construction contracts. + References No definition available. + Details
Name: | tdw_RefundsFromCancelledVesselConstructionContracts
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 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_OptionAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |