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v2.4.1.9

Schedule of Segment Reporting Information, Revenue by Vessel Class (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | $ 1,468,358 us-gaap_SalesRevenueServicesNet | $ 1,418,461 us-gaap_SalesRevenueServicesNet | $ 1,229,998 us-gaap_SalesRevenueServicesNet
Americas Fleet Deepwater vessels |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 353,232 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember | 263,750 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember | 179,032 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember
Percentage of revenue | 24.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember | 18.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember | 15.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetDeepwaterVesselsMember
Americas Fleet Towing-Supply/supply |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 125,029 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember | 115,055 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember | 120,817 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember
Percentage of revenue | 9.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember | 8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember | 10.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetTowingSupplyOrSupplyMember
Americas Fleet Other |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 27,438 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember | 31,926 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember | 27,210 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember
Percentage of revenue | 2.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetOtherMember | 3.00%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 | 505,699 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember | 410,731 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember | 327,059 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember
Percentage of revenue | 35.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember | 29.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember | 27.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AmericasFleetMember
Asia and Pacific Fleet Deepwater vessels |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 94,538 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember | 88,191 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember | 96,118 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember
Percentage of revenue | 6.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember | 6.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember | 8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetDeepwaterVesselsMember
Asia/Pacific Fleet Towing-Supply/supply |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 53,281 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember | 62,630 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember | 84,217 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember
Percentage of revenue | 4.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember | 5.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember | 7.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetTowingSupplyAndSupplyMember
Asia and Pacific Fleet Other |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 3,001 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember | 3,797 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetOtherMember | 3,679 us-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
Asia/Pacific Fleet |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 150,820 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember | 154,618 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember | 184,014 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember
Percentage of revenue | 10.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember | 11.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember | 15.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_AsiaAndPacificFleetMember
Middle East/North Africa Fleet Deepwater vessels |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 85,279 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember | 66,503 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember | 55,945 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember
Percentage of revenue | 6.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetDeepwaterVesselsMember | 5.00%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 | 117,232 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember | 116,720 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember | 89,902 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember
Percentage of revenue | 8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember | 8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember | 7.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetTowingSupplyAndSupplyMember
Middle East and North Africa Fleet Other |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 3,276 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember | 3,301 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetOtherMember | 3,565 us-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
Middle East/North Africa fleet |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 205,787 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember | 186,524 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember | 149,412 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember
Percentage of revenue | 14.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember | 13.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember | 12.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_MiddleEastAndNorthAfricaFleetMember
Sub-Saharan Africa/Europe Fleet Deepwater vessels |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 326,315 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember | 364,722 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember | 273,544 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember
Percentage of revenue | 22.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember | 26.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember | 22.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetDeepwaterVesselsMember
Sub-Saharan Africa/Europe Fleet Towing-Supply/supply |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 208,324 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember | 231,224 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember | 226,357 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember
Percentage of revenue | 14.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember | 16.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember | 18.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetTowingSupplyAndSupplyMember
Sub Saharan Africa And Europe Fleet Other |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 71,413 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember | 70,642 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember | 69,612 us-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 | 6.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetOtherMember
Sub-Saharan Africa/Europe Fleet |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 606,052 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember | 666,588 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember | 569,513 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember
Percentage of revenue | 41.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember | 47.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember | 46.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_SubSaharanAfricaAndEuropeFleetMember
Worldwide Fleet Deepwater vessels |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 859,364 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember | 783,166 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember | 604,639 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember
Percentage of revenue | 58.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember | 55.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember | 50.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetDeepwaterVesselsMember
Worldwide Fleet Towing-Supply/supply |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 503,866 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember | 525,629 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember | 521,293 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember
Percentage of revenue | 35.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember | 37.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember | 42.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetTowingSupplyAndSupplyMember
Worldwide Fleet Other |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | 105,128 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember | 109,666 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember | 104,066 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember
Percentage of revenue | 7.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember | 8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember | 8.00%tdw_SalesRevenueServicesPercentage / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetOtherMember
Worldwide Fleet |  |  |
Segment and Geographic Distribution of Operations [Line Items] |  |  |
Vessel revenues | $ 1,468,358 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember | $ 1,418,461 us-gaap_SalesRevenueServicesNet / tdw_RevenuesByVesselClassAxis = tdw_WorldwideFleetMember | $ 1,229,998 us-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

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