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Schedule of Segment Reporting Information, Revenue by Vessel Class (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 378,126us-gaap_SalesRevenueServicesNet	$ 360,713us-gaap_SalesRevenueServicesNet	$ 1,150,588us-gaap_SalesRevenueServicesNet	$ 1,056,011us-gaap_SalesRevenueServicesNet
Americas Fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	94,298us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember	72,048us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember	267,983us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember	188,891us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember
Percentage of revenue	25.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember	20.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember	23.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember	18.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember
Americas Fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	33,607us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember	30,451us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember	97,511us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember	88,982us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember
Percentage of revenue	9.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember	9.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember	9.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember	9.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember
Americas Fleet Other
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	6,649us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember	7,349us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember	23,056us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember	24,148us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember
Percentage of revenue	2.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember	2.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember	2.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember	2.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember
Americas Fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	134,554us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember	109,848us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember	388,550us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember	302,021us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember
Percentage of revenue	36.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember	31.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember	34.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember	29.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember
Asia and Pacific Fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	20,575us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember	20,142us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember	72,492us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember	64,357us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember
Percentage of revenue	5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember	6.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember	6.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember	6.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember
Asia/Pacific Fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	13,487us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember	15,235us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember	45,862us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember	49,516us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember
Percentage of revenue	4.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember	4.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember	4.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember	5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember
Asia and Pacific Fleet Other
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	984us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember	948us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember	2,930us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember	2,838us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember
Asia and Pacific Fleet Other | Maximum
Segment and Geographic Distribution of Operations [Line Items]
Percentage of revenue	1.00%tdw_SalesRevenueServicesPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember	1.00%tdw_SalesRevenueServicesPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember	1.00%tdw_SalesRevenueServicesPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember	1.00%tdw_SalesRevenueServicesPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember
Asia/Pacific Fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	35,046us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember	36,325us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember	121,284us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember	116,711us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember
Percentage of revenue	9.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember	10.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember	10.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember	11.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember
Middle East/North Africa Fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	25,615us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember	18,805us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember	64,336us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember	50,389us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember
Percentage of revenue	7.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember	5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember	6.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember	5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember
Middle East/North Africa Fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	29,441us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember	31,481us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember	93,435us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember	84,741us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember
Percentage of revenue	8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember	9.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember	8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember	8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember
Middle East and North Africa Fleet Other
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	869us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember	872us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember	2,530us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember	2,611us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember
Middle East and North Africa Fleet Other | Maximum
Segment and Geographic Distribution of Operations [Line Items]
Percentage of revenue	1.00%tdw_SalesRevenueServicesPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember	1.00%tdw_SalesRevenueServicesPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember	1.00%tdw_SalesRevenueServicesPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember	1.00%tdw_SalesRevenueServicesPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember
Middle East/North Africa fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	55,925us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember	51,158us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember	160,301us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember	137,741us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember
Percentage of revenue	15.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember	14.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember	14.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember	13.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember
Sub-Saharan Africa/Europe Fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	81,129us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember	84,866us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember	262,013us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember	278,658us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember
Percentage of revenue	21.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember	23.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember	23.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember	26.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember
Sub-Saharan Africa/Europe Fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	52,532us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember	59,789us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember	162,585us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember	171,421us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember
Percentage of revenue	14.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember	17.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember	14.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember	16.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember
Sub Saharan Africa And Europe Fleet Other
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	18,940us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember	18,727us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember	55,855us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember	49,459us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember
Percentage of revenue	5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember	5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember	5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember	5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember
Sub-Saharan Africa/Europe Fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	152,601us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember	163,382us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember	480,453us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember	499,538us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember
Percentage of revenue	40.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember	45.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember	42.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember	47.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember
Worldwide Fleet Deepwater vessels
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	221,617us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember	195,861us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember	666,824us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember	582,295us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember
Percentage of revenue	58.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember	54.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember	58.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember	55.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember
Worldwide Fleet Towing-Supply/supply
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	129,067us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember	136,956us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember	399,393us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember	394,660us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember
Percentage of revenue	35.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember	39.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember	35.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember	38.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember
Worldwide Fleet Other
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	27,442us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember	27,896us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember	84,371us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember	79,056us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember
Percentage of revenue	7.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember	7.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember	7.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember	7.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember
Worldwide Fleet
Segment and Geographic Distribution of Operations [Line Items]
Vessel revenues	$ 378,126us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember	$ 360,713us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember	$ 1,150,588us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember	$ 1,056,011us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember
Percentage of revenue	100.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember	100.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember	100.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember	100.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember

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

-Publisher FASB

-Name Accounting Standards Codification

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