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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 9 Months Ended
Dec. 31, 2013
Vessel
Dec. 31, 2014
T
Significant Purchase and Supply Commitment [Line Items]    
Number of Vessels, commitments   30tdw_SignificantCommitmentNumberOfVessel
Vessel Commitments    
Significant Purchase and Supply Commitment [Line Items]    
Number of Vessels, commitments   28tdw_SignificantCommitmentNumberOfVessel
/ us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis
= tdw_VesselCommitmentsMember
Deepwater PSVs    
Significant Purchase and Supply Commitment [Line Items]    
Significant commitment, new construction deadweight tons capacity range, low   3,000tdw_SignificantCommitmentNewConstructionDeadWeightTonsCapacityRangeLow
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_DeepwaterPlatformSupplyVesselsMember
Significant commitment, new construction deadweight tons capacity range, high   6,360tdw_SignificantCommitmentNewConstructionDeadWeightTonsCapacityRangeHigh
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_DeepwaterPlatformSupplyVesselsMember
Significant commitment, new construction final delivery date   August 2016
Number of vessels took for delivery 2tdw_SignificantDeliveryCommitmentNumberOfVessels
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_DeepwaterPlatformSupplyVesselsMember		  
Amount held as escrow $ 11.7us-gaap_EscrowDeposit
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_DeepwaterPlatformSupplyVesselsMember		  
Number of vessels 2tdw_NumberOfVessels
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_DeepwaterPlatformSupplyVesselsMember		  
Number of vessels, sold 1tdw_NumberOfVesselsSold
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_DeepwaterPlatformSupplyVesselsMember		  
Deferred gain amortization period 10 years  
Towing Supply Vessels    
Significant Purchase and Supply Commitment [Line Items]    
Significant commitment, new construction brake horsepower   7,145tdw_SignificantCommitmentNewConstructionBrakeHorsepower
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_TowingSupplyAndSupplyMember
Remotely Operated Vehicles Commitments    
Significant Purchase and Supply Commitment [Line Items]    
Number of vessels took for delivery   2tdw_SignificantDeliveryCommitmentNumberOfVessels
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_RemotelyOperatedVehiclesCommitmentsMember
Shallow Water Towing Supply Vessels    
Significant Purchase and Supply Commitment [Line Items]    
Insurance coverage by the third party credit support for the carrying value of the accumulated costs   2.5tdw_CommitmentsAndContingenciesCarryingValueOfAccumulatedCosts
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_ShallowWaterTowingSupplyVesselsMember
Fast, Crew/Supply Boat    
Significant Purchase and Supply Commitment [Line Items]    
Insurance coverage by the third party credit support for the carrying value of the accumulated costs   2.4tdw_CommitmentsAndContingenciesCarryingValueOfAccumulatedCosts
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_FastCrewSupplyBoatMember
Number of vessels under construction   1tdw_SignificantCommitmentsNewConstruction
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_FastCrewSupplyBoatMember
Insurance coverage for the progress payments made on the vessel by the third party credit support   90.00%tdw_CommitmentsAndContingenciesPercentageOfThirdPartyCredit
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_FastCrewSupplyBoatMember
Committed and invested amount   8.0tdw_FundedInvestmentCommitments
/ tdw_SignificantPurchaseAndSupplyCommitmentAxis
= tdw_FastCrewSupplyBoatMember