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Sale/ Leaseback Arrangements - Additional Information (Detail) (USD $)	3 Months Ended				9 Months Ended
	Dec. 31, 2014 Vessel	Sep. 30, 2014 Vessel	Jun. 30, 2014 Vessel	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Sale Leaseback Transaction [Line Items]
Number of vessels sold	3tdw_SaleLeasebackTransactionNumberOfVessels	1tdw_SaleLeasebackTransactionNumberOfVessels	1tdw_SaleLeasebackTransactionNumberOfVessels
Proceeds from sale	$ 78,200,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities	$ 19,400,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities	$ 13,400,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities		$ 110,694,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities	$ 207,435,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities
Deferred gain	45,000,000us-gaap_SaleLeasebackTransactionDeferredGainGross	11,200,000us-gaap_SaleLeasebackTransactionDeferredGainGross	9,400,000us-gaap_SaleLeasebackTransactionDeferredGainGross		45,000,000us-gaap_SaleLeasebackTransactionDeferredGainGross
Carrying value	33,200,000us-gaap_SaleLeasebackTransactionNetBookValue	8,200,000us-gaap_SaleLeasebackTransactionNetBookValue	4,000,000us-gaap_SaleLeasebackTransactionNetBookValue		33,200,000us-gaap_SaleLeasebackTransactionNetBookValue
Reacquisition percentage of original sales price		47.00%tdw_SaleLeasebackTransactionPercentageOfSalesPriceToReacquire	61.00%tdw_SaleLeasebackTransactionPercentageOfSalesPriceToReacquire
Length of extension period, months	24 months	24 months	24 months
Bareboat charter arrangements expenses incurred	7,200,000us-gaap_SaleLeasebackTransactionRentExpense			5,800,000us-gaap_SaleLeasebackTransactionRentExpense	20,200,000us-gaap_SaleLeasebackTransactionRentExpense	13,800,000us-gaap_SaleLeasebackTransactionRentExpense
Agreement during the second quarter of fiscal 2015
Sale Leaseback Transaction [Line Items]
Lease expiration date					Quarter ending March 2023
Agreement during the first quarter of fiscal 2015
Sale Leaseback Transaction [Line Items]
Lease expiration date					Quarter ending June 2021
Agreement during the third quarter of fiscal 2015 | First two Leases
Sale Leaseback Transaction [Line Items]
Number of leases expired					2tdw_NumberOfExpiringLeases / us-gaap_LeaseArrangementTypeAxis = tdw_LeaseOneAndLeaseTwoMember / us-gaap_SaleLeasebackTransactionDescriptionAxis = tdw_AgreementThreeMember
Lease expiration date					Quarter ending December 2022
Agreement during the third quarter of fiscal 2015 | Third Lease
Sale Leaseback Transaction [Line Items]
Number of leases expired					1tdw_NumberOfExpiringLeases / us-gaap_LeaseArrangementTypeAxis = tdw_LeaseThreeMember / us-gaap_SaleLeasebackTransactionDescriptionAxis = tdw_AgreementThreeMember
Lease expiration date					Quarter ending December 2023
First Two Vessels | Seventh Year
Sale Leaseback Transaction [Line Items]
Reacquisition percentage of original sales price	60.00%tdw_SaleLeasebackTransactionPercentageOfSalesPriceToReacquire / tdw_PeriodAxis = tdw_SeventhYearMember / us-gaap_SaleLeasebackTransactionDescriptionAxis = tdw_FirstTwoVesselsMember
Third Vessel | Eighth Year
Sale Leaseback Transaction [Line Items]
Reacquisition percentage of original sales price	60.00%tdw_SaleLeasebackTransactionPercentageOfSalesPriceToReacquire / tdw_PeriodAxis = tdw_EighthYearMember / us-gaap_SaleLeasebackTransactionDescriptionAxis = tdw_ThirdMember
Fiscal 2006 sale/Leaseback
Sale Leaseback Transaction [Line Items]
Repurchase of leased vessels	$ 11,200,000tdw_PurchasesOfLeasedInAssets / us-gaap_SaleLeasebackTransactionDescriptionAxis = tdw_TwoThousandSixMember

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The amount of the gain recorded in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller to be recognized in future periods.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 40

-Section 25

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Amount of cash inflow before closing and deferred financing costs received by a seller-lessee in a sale-leaseback recognized in investing activities.

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-Publisher FASB

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-Topic 840

-SubTopic 40

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The net book value of the asset(s) sold in connection with the sale of the property to another party and lease back to the seller.

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The amount of the current period expense recorded for use of the property in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

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