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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 | 3 tdw_SaleLeasebackTransactionNumberOfVessels | 1 tdw_SaleLeasebackTransactionNumberOfVessels | 1 tdw_SaleLeasebackTransactionNumberOfVessels |  |  |
Proceeds from sale | $ 78,200,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities | $ 19,400,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities | $ 13,400,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities |  | $ 110,694,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities | $ 207,435,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities
Deferred gain | 45,000,000 us-gaap_SaleLeasebackTransactionDeferredGainGross | 11,200,000 us-gaap_SaleLeasebackTransactionDeferredGainGross | 9,400,000 us-gaap_SaleLeasebackTransactionDeferredGainGross |  | 45,000,000 us-gaap_SaleLeasebackTransactionDeferredGainGross |
Carrying value | 33,200,000 us-gaap_SaleLeasebackTransactionNetBookValue | 8,200,000 us-gaap_SaleLeasebackTransactionNetBookValue | 4,000,000 us-gaap_SaleLeasebackTransactionNetBookValue |  | 33,200,000 us-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 | 7,200,000 us-gaap_SaleLeasebackTransactionRentExpense |  |  | 5,800,000 us-gaap_SaleLeasebackTransactionRentExpense | 20,200,000 us-gaap_SaleLeasebackTransactionRentExpense | 13,800,000 us-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 |  |  |  |  | 2 tdw_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 |  |  |  |  | 1 tdw_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 | $ 11,200,000 tdw_PurchasesOfLeasedInAssets / us-gaap_SaleLeasebackTransactionDescriptionAxis = tdw_TwoThousandSixMember |  |  |  |  |

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- Definition 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 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6456126&loc=d3e49567-112750 + Details
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- Definition Amount of cash inflow before closing and deferred financing costs received by a seller-lessee in a sale-leaseback recognized in investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51840-112757 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51831-112757 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51843-112757 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51840-112757 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51831-112757 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51843-112757 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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