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Schedule of Vessel Commitments (Detail) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Dec. 31, 2014 Vessel
Significant Purchase and Supply Commitment [Line Items] |
Number of Vessels, commitments | 30 tdw_SignificantCommitmentNumberOfVessel
Total cost, commitments | $ 847,841 tdw_SignificantCommitmentsTotalExpenditure
Invested, commitments | 343,956 tdw_SignificantCommitmentProgressPaymentsInvestedThroughPeriod
Remaining Balance, commitments | 503,885 tdw_CommitmentsRemainingExpenditures
Deepwater PSVs |
Significant Purchase and Supply Commitment [Line Items] |
Number of vessels under construction | 21 tdw_SignificantCommitmentsNewConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_DeepwaterPlatformSupplyVesselsMember
Total cost, under construction | 713,903 tdw_SignificantCommitmentTotalCostOfVesselUnderConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_DeepwaterPlatformSupplyVesselsMember
Invested, under construction | 258,460 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_DeepwaterPlatformSupplyVesselsMember
Remaining Balance, under construction | 455,443 tdw_SignificantCommitmentRemainingBalanceOfVesselUnderConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_DeepwaterPlatformSupplyVesselsMember
Towing Supply Vessels |
Significant Purchase and Supply Commitment [Line Items] |
Number of vessels under construction | 6 tdw_SignificantCommitmentsNewConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_TowingSupplyAndSupplyMember
Total cost, under construction | 112,284 tdw_SignificantCommitmentTotalCostOfVesselUnderConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_TowingSupplyAndSupplyMember
Invested, under construction | 64,542 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_TowingSupplyAndSupplyMember
Remaining Balance, under construction | 47,742 tdw_SignificantCommitmentRemainingBalanceOfVesselUnderConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_TowingSupplyAndSupplyMember
Other |
Significant Purchase and Supply Commitment [Line Items] |
Number of vessels under construction | 1 tdw_SignificantCommitmentsNewConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_OthersMember
Total cost, under construction | 8,014 tdw_SignificantCommitmentTotalCostOfVesselUnderConstruction / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_OthersMember
Invested, under construction | 8,014 tdw_SignificantCommitmentsNewConstructionProgressPaymentsInvested / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_OthersMember
Vessel Commitments |
Significant Purchase and Supply Commitment [Line Items] |
Number of Vessels, commitments | 28 tdw_SignificantCommitmentNumberOfVessel / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselCommitmentsMember
Total cost, commitments | 834,201 tdw_SignificantCommitmentsTotalExpenditure / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselCommitmentsMember
Invested, commitments | 331,016 tdw_SignificantCommitmentProgressPaymentsInvestedThroughPeriod / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselCommitmentsMember
Remaining Balance, commitments | 503,185 tdw_CommitmentsRemainingExpenditures / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_VesselCommitmentsMember
Remotely Operated Vehicles Commitments |
Significant Purchase and Supply Commitment [Line Items] |
Number of Vessels, commitments | 2 tdw_SignificantCommitmentNumberOfVessel / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_RemotelyOperatedVehiclesCommitmentsMember
Total cost, commitments | 13,640 tdw_SignificantCommitmentsTotalExpenditure / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_RemotelyOperatedVehiclesCommitmentsMember
Invested, commitments | 12,940 tdw_SignificantCommitmentProgressPaymentsInvestedThroughPeriod / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_RemotelyOperatedVehiclesCommitmentsMember
Remaining Balance, commitments | $ 700 tdw_CommitmentsRemainingExpenditures / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = tdw_RemotelyOperatedVehiclesCommitmentsMember

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