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v2.4.1.9

Segment Information, Geographical Data and Major Customers (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,468,358 us-gaap_SalesRevenueServicesNet |  | $ 1,418,461 us-gaap_SalesRevenueServicesNet |  | $ 1,229,998 us-gaap_SalesRevenueServicesNet |
Other operating revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,159 us-gaap_OtherSalesRevenueNet |  | 16,642 us-gaap_OtherSalesRevenueNet |  | 14,167 us-gaap_OtherSalesRevenueNet |
Revenues | 324,762 us-gaap_Revenues |  | 387,554 us-gaap_Revenues |  | 397,524 us-gaap_Revenues |  | 385,677 us-gaap_Revenues |  | 367,833 us-gaap_Revenues |  | 365,248 us-gaap_Revenues |  | 367,937 us-gaap_Revenues |  | 334,085 us-gaap_Revenues |  | 1,495,517 us-gaap_Revenues |  | 1,435,103 us-gaap_Revenues |  | 1,244,165 us-gaap_Revenues |
Operating profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 285,934 us-gaap_GrossProfit |  | 296,878 us-gaap_GrossProfit |  | 251,718 us-gaap_GrossProfit |
General and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (189,819)us-gaap_GeneralAndAdministrativeExpense |  | (187,976)us-gaap_GeneralAndAdministrativeExpense |  | (175,609)us-gaap_GeneralAndAdministrativeExpense |
Corporate expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (44,635)tdw_CorporateExpenses |  | (50,776)tdw_CorporateExpenses |  | (52,095)tdw_CorporateExpenses |
Gain on asset dispositions, net | 4,275 us-gaap_GainLossOnDispositionOfAssets |  | (1,537)us-gaap_GainLossOnDispositionOfAssets |  | 3,590 us-gaap_GainLossOnDispositionOfAssets |  | 2,943 us-gaap_GainLossOnDispositionOfAssets |  | 2,363 us-gaap_GainLossOnDispositionOfAssets |  | 7,170 us-gaap_GainLossOnDispositionOfAssets |  | 49 us-gaap_GainLossOnDispositionOfAssets |  | 2,140 us-gaap_GainLossOnDispositionOfAssets |  | 9,271 us-gaap_GainLossOnDispositionOfAssets |  | 11,722 us-gaap_GainLossOnDispositionOfAssets |  | 6,609 us-gaap_GainLossOnDispositionOfAssets |
Goodwill impairment |  |  | (283,699)us-gaap_GoodwillImpairmentLoss |  |  |  |  |  |  |  | (56,283)us-gaap_GoodwillImpairmentLoss |  |  |  |  |  | (283,699)us-gaap_GoodwillImpairmentLoss | [1] | (56,283)us-gaap_GoodwillImpairmentLoss |  |  |
Restructuring charge | (4,100)us-gaap_RestructuringCharges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,052)us-gaap_RestructuringCharges |  |  |  |  |
Operating income (loss) | 25,672 us-gaap_OperatingIncomeLoss | [2] | (213,580)us-gaap_OperatingIncomeLoss | [2] | 84,723 us-gaap_OperatingIncomeLoss | [2] | 66,004 us-gaap_OperatingIncomeLoss | [2] | 61,063 us-gaap_OperatingIncomeLoss | [2] | 20,488 us-gaap_OperatingIncomeLoss | [2] | 76,565 us-gaap_OperatingIncomeLoss | [2] | 43,425 us-gaap_OperatingIncomeLoss | [2] | (37,181)us-gaap_OperatingIncomeLoss |  | 201,541 us-gaap_OperatingIncomeLoss |  | 206,232 us-gaap_OperatingIncomeLoss |
Foreign exchange gain |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,678 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax |  | 1,541 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax |  | 3,011 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax |
Equity in net earnings of unconsolidated companies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,179 us-gaap_IncomeLossFromEquityMethodInvestments |  | 15,801 us-gaap_IncomeLossFromEquityMethodInvestments |  | 12,189 us-gaap_IncomeLossFromEquityMethodInvestments |
Interest income and other, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,927 us-gaap_InvestmentIncomeNonoperating |  | 2,123 us-gaap_InvestmentIncomeNonoperating |  | 3,476 us-gaap_InvestmentIncomeNonoperating |
Loss on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,144)us-gaap_GainsLossesOnExtinguishmentOfDebt |  |  |
Interest and other debt costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (50,029)us-gaap_InterestExpense |  | (43,814)us-gaap_InterestExpense |  | (29,745)us-gaap_InterestExpense |
Earnings (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (66,426)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |  | 173,048 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |  | 195,163 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 175,204 us-gaap_DepreciationAndAmortization |  | 167,480 us-gaap_DepreciationAndAmortization |  | 147,299 us-gaap_DepreciationAndAmortization |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 366,563 us-gaap_PropertyPlantAndEquipmentAdditions |  | 806,484 us-gaap_PropertyPlantAndEquipmentAdditions |  | 452,582 us-gaap_PropertyPlantAndEquipmentAdditions |
Assets | 4,756,162 us-gaap_Assets |  |  |  |  |  |  |  | 4,885,829 us-gaap_Assets |  |  |  |  |  |  |  | 4,756,162 us-gaap_Assets |  | 4,885,829 us-gaap_Assets |  | 4,168,055 us-gaap_Assets |
Investments in and advances to unconsolidated companies | 65,844 us-gaap_EquityMethodInvestments |  |  |  |  |  |  |  | 63,928 us-gaap_EquityMethodInvestments |  |  |  |  |  |  |  | 65,844 us-gaap_EquityMethodInvestments |  | 63,928 us-gaap_EquityMethodInvestments |  | 46,047 us-gaap_EquityMethodInvestments |
Americas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (114,237)us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  |  |  |  |
Asia/Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  |  |  |  |  |  | (56,300)us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  |  |  |  |  |  |  | (56,283)us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  |  |
Sub-Saharan Africa/Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (169,462)us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  |  |  |  |
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 293,956 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  | 298,808 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  | 252,551 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 167,217 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  | 164,112 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  | 143,895 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 223,581 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  | 599,410 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  | 273,524 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Assets | 4,253,391 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | [3] |  |  |  |  |  |  | 4,435,925 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | [3] |  |  |  |  |  |  | 4,253,391 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | [3] | 4,435,925 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | [3] | 3,701,393 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember | [3]
Operating Segments | Americas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 505,699 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  | 410,731 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  | 327,059 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |
Operating profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 122,988 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  | 90,936 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  | 40,318 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 47,682 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  | 43,298 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  | 40,454 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 94,137 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  | 99,798 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |  | 52,299 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember |
Assets | 1,016,133 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember | [3] |  |  |  |  |  |  | 1,017,736 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember | [3] |  |  |  |  |  |  | 1,016,133 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember | [3] | 1,017,736 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember | [3] | 880,368 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AmericasSegmentMember | [3]
Operating Segments | Asia/Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,820 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  | 154,618 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  | 184,014 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |
Operating profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,541 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  | 29,044 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  | 43,704 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,383 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  | 17,174 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  | 19,416 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 91,497 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  | 2,586 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  | 19,858 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |
Assets | 506,265 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember | [3] |  |  |  |  |  |  | 421,379 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember | [3] |  |  |  |  |  |  | 506,265 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember | [3] | 421,379 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember | [3] | 607,546 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember | [3]
Operating Segments | Middle East/North Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 205,787 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |  | 186,524 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |  | 149,412 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |
Operating profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 37,258 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |  | 42,736 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |  | 39,069 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,538 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |  | 24,441 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |  | 18,784 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,842 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |  | 8,042 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |  | 3,833 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember |
Assets | 666,983 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember | [3] |  |  |  |  |  |  | 613,303 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember | [3] |  |  |  |  |  |  | 666,983 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember | [3] | 613,303 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember | [3] | 507,124 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_MiddleEastAndNorthAfricaMember | [3]
Operating Segments | Sub-Saharan Africa/Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 606,052 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  | 666,588 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  | 569,513 us-gaap_SalesRevenueServicesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |
Operating profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 122,169 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  | 136,092 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  | 129,460 us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73,614 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  | 79,199 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  | 65,241 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,105 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember | [4] | 488,984 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember | [4] | 197,534 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember | [4]
Assets | 2,064,010 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember | [3] |  |  |  |  |  |  | 2,383,507 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember | [3] |  |  |  |  |  |  | 2,064,010 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember | [3] | 2,383,507 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember | [3] | 1,706,355 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember | [3]
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (8,022)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  | (1,930)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  | (833)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,973 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  | 295 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  | 13 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,571 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  | 31,841 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  |  |
Assets | 49,554 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  |  |  |  |  |  |  | 31,545 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  |  |  |  |  |  |  | 49,554 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  | 31,545 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |  | 5,102 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_OtherActivityMember |
Corporate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
General and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (40,621)us-gaap_GeneralAndAdministrativeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [5] | (47,703)us-gaap_GeneralAndAdministrativeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [5] | (48,704)us-gaap_GeneralAndAdministrativeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [5]
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,014 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | 3,073 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | 3,391 us-gaap_DepreciationAndAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 124,411 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [6] | 175,233 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [6] | 179,058 us-gaap_PropertyPlantAndEquipmentAdditions / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [6]
Assets | 387,373 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [7] |  |  |  |  |  |  | 354,431 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [7] |  |  |  |  |  |  | 387,373 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [7] | 354,431 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [7] | 415,513 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember | [7]
Assets Before Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets | 4,302,945 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeEquityMethodInvestmentsMember |  |  |  |  |  |  |  | 4,467,470 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeEquityMethodInvestmentsMember |  |  |  |  |  |  |  | 4,302,945 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeEquityMethodInvestmentsMember |  | 4,467,470 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeEquityMethodInvestmentsMember |  | 3,706,495 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeEquityMethodInvestmentsMember |
Assets Before Corporate Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets | $ 4,368,789 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeCorporateAssetsMember |  |  |  |  |  |  |  | $ 4,531,398 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeCorporateAssetsMember |  |  |  |  |  |  |  | $ 4,368,789 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeCorporateAssetsMember |  | $ 4,531,398 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeCorporateAssetsMember |  | $ 3,752,542 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = tdw_AssetsBeforeCorporateAssetsMember |
[1] | The total carrying amount of goodwill at December 31, 2014 is net of accumulated impairment charges of $370.9 million.
[2] | Operating income consists of revenues less operating costs and expenses, depreciation, vessel operating leases, goodwill impairment, general and administrative expenses and gain on asset dispositions, net, of the company's operations. Goodwill impairment by quarter for fiscal 2015 and 2014 and gain on asset dispositions, net, by quarter for fiscal 2015 and 2014, are as follows:
[3] | Marine support services are conducted worldwide with assets that are highly mobile. Revenues are principally derived from offshore service vessels, which regularly and routinely move from one operating area to another, often to and from offshore operating areas in different continents. Because of this asset mobility, revenues and long-lived assets attributable to the company's international marine operations in any one country are not material.
[4] | Included in Sub-Saharan Africa/Europe for the year ended March 31, 2014 is $245.6 million related to vessels acquired through the acquisition of Troms Offshore.
[5] | Included in Corporate general and administrative expenses for the year ended March 31, 2014 and 2013 are transaction costs of $3.7 million related to the acquisition of Troms Offshore and a settlement charge of $5.2 million related to the payment of retirement benefits to a former Chief Executive Officer, respectively.
[6] | Included in Corporate are additions to properties and equipment relating to vessels currently under construction which have not yet been assigned to a non-corporate reporting segment as of the dates presented.
[7] | Included in Corporate are vessels currently under construction which have not yet been assigned to a non-corporate reporting segment. The vessel construction costs will be reported in Corporate until the earlier of the vessels being assigned to a non-corporate reporting segment or the vessels' delivery. At March 31, 2015, 2014 and 2013, $235.2 million, $228.9 million and $229.3 million, respectively, of vessel construction costs are included in Corporate.

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