XML 1109 R153.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Subsequent Events - Additional Information (Detail) (USD $) | 1 Months Ended | 12 Months Ended | 1 Months Ended | 2 Months Ended | 1 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2015 | Apr. 30, 2015 Contract | May 27, 2015 | May 31, 2015 Vessel | May 27, 2015 Vessel | Apr. 23, 2015 Vessel | May 27, 2015
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Amount remaining authorized to repurchase shares | $ 100,000,000 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 | $ 100,000,000 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 |  |  |  |  |  |
Number of Vessels, commitments | 21 tdw_SignificantCommitmentNumberOfVessel | 21 tdw_SignificantCommitmentNumberOfVessel |  |  |  |  |  |
Troms Offshore Supply AS | Notes Due April 2027 |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Debt instruments face amount | 29,500,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember | 29,500,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember |  |  |  |  |  |
Debt instrument maturity, month and year | 2027-01 |  |  |  |  |  |  |
Semi-annual principal payments | 1,200,000 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember |  |  |  |  |  |  |
Debt instrument bearing floating interest rate | 2.91%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember | 2.91%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember |  |  |  |  |  |
Indebtedness rate | 1.30%tdw_DebtInstrumentAggregateRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember |  |  |  |  |  |  |
Total capitalization rate | 4.21%tdw_CapitalizationRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember | 4.21%tdw_CapitalizationRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember |  |  |  |  |  |
Deepwater PSVs |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Aggregate installment payment | 1,000,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember | 1,000,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember |  |  |  |  |  |
7145 BHP towing-supply-class ATHS vessels |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Aggregate installment payment | 1,000,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselsUnderConstructionMember | 1,000,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselsUnderConstructionMember |  |  |  |  |  |
Current Credit Facility |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Credit facility expiration date |  | 2018-06 |  |  |  |  |  |
Revolving credit facility | 900,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember | 900,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember |  |  |  |  |  |
Credit facility term |  | 5 years |  |  |  |  |  |
Revolving line of credit |  | 600,000,000 tdw_LineOfCreditFacilityRevolvingLineOfCredit / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember |  |  |  |  |  |
Term loan |  | 300,000,000 tdw_LineOfCreditFacilityTermLoan / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Number of terminated contracts |  |  | 3 tdw_NumberOfContractsTerminated / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |  |
Subsequent Event | Troms Offshore Supply AS | Notes Due April 2027 |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Debt instruments face amount |  |  |  | 31,300,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 31,300,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 31,300,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Debt instrument maturity, month and year |  |  |  | 2027-04 |  |  |  |
Semi-annual principal payments |  |  |  | 1,300,000 us-gaap_DebtInstrumentPeriodicPaymentPrincipal / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Debt instrument bearing floating interest rate |  |  |  | 2.92%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 2.92%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 2.92%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Indebtedness rate |  |  |  | 1.30%tdw_DebtInstrumentAggregateRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Total capitalization rate |  |  |  | 4.22%tdw_CapitalizationRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 4.22%tdw_CapitalizationRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 4.22%tdw_CapitalizationRate / us-gaap_DebtInstrumentAxis = tdw_SeniorNotesDueTwentyTwentySevenMember / dei_LegalEntityAxis = tdw_TromsOffshoreSupplyAsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Subsequent Event | Deepwater PSVs |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Aggregate installment payment |  |  |  | 5,400,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 5,700,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 5,400,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 5,400,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Aggregate estimated remaining cost |  |  |  |  | 41,000,000 tdw_SignificantCommitmentRemainingBalanceOfVesselUnderConstruction / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |
Number of vessels under construction |  |  |  |  | 2 tdw_SignificantCommitmentsNewConstruction / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember | 2 tdw_SignificantCommitmentsNewConstruction / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |
Significant commitment, new construction delivery date |  |  |  | Jun. 30, 2016 | Jun. 30, 2016 |  |  |
Obligation to be relieved |  |  |  |  |  | 21,700,000 us-gaap_DebtInstrumentDecreaseForgiveness / tdw_SignificantPurchaseAndSupplyCommitmentAxis = tdw_DeepwaterPlatformSupplyVesselsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |
Subsequent Event | 7145 BHP towing-supply-class ATHS vessels |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Number of Vessels, commitments |  |  |  |  |  |  | 6 tdw_SignificantCommitmentNumberOfVessel / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselsUnderConstructionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Number of terminated contracts |  |  |  |  |  |  | 3 tdw_NumberOfContractsTerminated / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselsUnderConstructionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Aggregate installment payment |  |  |  |  |  |  | 36,100,000 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselsUnderConstructionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Aggregate estimated remaining cost |  |  |  |  |  |  | 12,700,000 tdw_SignificantCommitmentRemainingBalanceOfVesselUnderConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselsUnderConstructionMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |
Subsequent Event | Current Credit Facility |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Credit facility expiration date |  |  |  |  |  |  |  | 2019-06
Revolving credit facility |  |  |  | 900,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 900,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  | 900,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Credit facility term |  |  |  |  |  |  |  | 5 years
Revolving line of credit |  |  |  |  |  |  |  | 600,000,000 tdw_LineOfCreditFacilityRevolvingLineOfCredit / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Term loan |  |  |  |  |  |  |  | $ 300,000,000 tdw_LineOfCreditFacilityTermLoan / us-gaap_LineOfCreditFacilityAxis = tdw_CurrentCreditFacilityMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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