XML 1018 R142.htm IDEA: XBRL DOCUMENT 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                 $ 1,468,358us-gaap_SalesRevenueServicesNet $ 1,418,461us-gaap_SalesRevenueServicesNet $ 1,229,998us-gaap_SalesRevenueServicesNet
Other operating revenues                 27,159us-gaap_OtherSalesRevenueNet 16,642us-gaap_OtherSalesRevenueNet 14,167us-gaap_OtherSalesRevenueNet
Revenues 324,762us-gaap_Revenues 387,554us-gaap_Revenues 397,524us-gaap_Revenues 385,677us-gaap_Revenues 367,833us-gaap_Revenues 365,248us-gaap_Revenues 367,937us-gaap_Revenues 334,085us-gaap_Revenues 1,495,517us-gaap_Revenues 1,435,103us-gaap_Revenues 1,244,165us-gaap_Revenues
Operating profit                 285,934us-gaap_GrossProfit 296,878us-gaap_GrossProfit 251,718us-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 4,275us-gaap_GainLossOnDispositionOfAssets (1,537)us-gaap_GainLossOnDispositionOfAssets 3,590us-gaap_GainLossOnDispositionOfAssets 2,943us-gaap_GainLossOnDispositionOfAssets 2,363us-gaap_GainLossOnDispositionOfAssets 7,170us-gaap_GainLossOnDispositionOfAssets 49us-gaap_GainLossOnDispositionOfAssets 2,140us-gaap_GainLossOnDispositionOfAssets 9,271us-gaap_GainLossOnDispositionOfAssets 11,722us-gaap_GainLossOnDispositionOfAssets 6,609us-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) 25,672us-gaap_OperatingIncomeLoss [2] (213,580)us-gaap_OperatingIncomeLoss [2] 84,723us-gaap_OperatingIncomeLoss [2] 66,004us-gaap_OperatingIncomeLoss [2] 61,063us-gaap_OperatingIncomeLoss [2] 20,488us-gaap_OperatingIncomeLoss [2] 76,565us-gaap_OperatingIncomeLoss [2] 43,425us-gaap_OperatingIncomeLoss [2] (37,181)us-gaap_OperatingIncomeLoss 201,541us-gaap_OperatingIncomeLoss 206,232us-gaap_OperatingIncomeLoss
Foreign exchange gain                 8,678us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 1,541us-gaap_ForeignCurrencyTransactionGainLossBeforeTax 3,011us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Equity in net earnings of unconsolidated companies                 10,179us-gaap_IncomeLossFromEquityMethodInvestments 15,801us-gaap_IncomeLossFromEquityMethodInvestments 12,189us-gaap_IncomeLossFromEquityMethodInvestments
Interest income and other, net                 1,927us-gaap_InvestmentIncomeNonoperating 2,123us-gaap_InvestmentIncomeNonoperating 3,476us-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 173,048us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 195,163us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Depreciation and amortization                 175,204us-gaap_DepreciationAndAmortization 167,480us-gaap_DepreciationAndAmortization 147,299us-gaap_DepreciationAndAmortization
Additions to properties and equipment                 366,563us-gaap_PropertyPlantAndEquipmentAdditions 806,484us-gaap_PropertyPlantAndEquipmentAdditions 452,582us-gaap_PropertyPlantAndEquipmentAdditions
Assets 4,756,162us-gaap_Assets       4,885,829us-gaap_Assets       4,756,162us-gaap_Assets 4,885,829us-gaap_Assets 4,168,055us-gaap_Assets
Investments in and advances to unconsolidated companies 65,844us-gaap_EquityMethodInvestments       63,928us-gaap_EquityMethodInvestments       65,844us-gaap_EquityMethodInvestments 63,928us-gaap_EquityMethodInvestments 46,047us-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                 293,956us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 298,808us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 252,551us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
Depreciation and amortization                 167,217us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 164,112us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 143,895us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
Additions to properties and equipment                 223,581us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 599,410us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 273,524us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
Assets 4,253,391us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 [3]       4,435,925us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 [3]       4,253,391us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 [3] 4,435,925us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 [3] 3,701,393us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember		 [3]
Operating Segments | Americas                      
Segment Reporting Information [Line Items]                      
Vessel revenues                 505,699us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 410,731us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 327,059us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember
Operating profit                 122,988us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 90,936us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 40,318us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember
Depreciation and amortization                 47,682us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 43,298us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 40,454us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember
Additions to properties and equipment                 94,137us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 99,798us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 52,299us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember
Assets 1,016,133us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 [3]       1,017,736us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 [3]       1,016,133us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 [3] 1,017,736us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AmericasSegmentMember		 [3] 880,368us-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                 150,820us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 154,618us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 184,014us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember
Operating profit                 11,541us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 29,044us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 43,704us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember
Depreciation and amortization                 18,383us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 17,174us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 19,416us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember
Additions to properties and equipment                 91,497us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 2,586us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 19,858us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember
Assets 506,265us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 [3]       421,379us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 [3]       506,265us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 [3] 421,379us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		 [3] 607,546us-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                 205,787us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 186,524us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 149,412us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember
Operating profit                 37,258us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 42,736us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 39,069us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember
Depreciation and amortization                 27,538us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 24,441us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 18,784us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember
Additions to properties and equipment                 1,842us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 8,042us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 3,833us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember
Assets 666,983us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 [3]       613,303us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 [3]       666,983us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 [3] 613,303us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_MiddleEastAndNorthAfricaMember		 [3] 507,124us-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                 606,052us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 666,588us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 569,513us-gaap_SalesRevenueServicesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember
Operating profit                 122,169us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 136,092us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 129,460us-gaap_GrossProfit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember
Depreciation and amortization                 73,614us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 79,199us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 65,241us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember
Additions to properties and equipment                 36,105us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 [4] 488,984us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 [4] 197,534us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 [4]
Assets 2,064,010us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 [3]       2,383,507us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 [3]       2,064,010us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 [3] 2,383,507us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 [3] 1,706,355us-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                 3,973us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember		 295us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember		 13us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember
Additions to properties and equipment                 18,571us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember		 31,841us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember		  
Assets 49,554us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember		       31,545us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember		       49,554us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember		 31,545us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_OtherActivityMember		 5,102us-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                 4,014us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 3,073us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 3,391us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Additions to properties and equipment                 124,411us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 [6] 175,233us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 [6] 179,058us-gaap_PropertyPlantAndEquipmentAdditions
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 [6]
Assets 387,373us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 [7]       354,431us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 [7]       387,373us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 [7] 354,431us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 [7] 415,513us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 [7]
Assets Before Equity Method Investments                      
Segment Reporting Information [Line Items]                      
Assets 4,302,945us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeEquityMethodInvestmentsMember		       4,467,470us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeEquityMethodInvestmentsMember		       4,302,945us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeEquityMethodInvestmentsMember		 4,467,470us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeEquityMethodInvestmentsMember		 3,706,495us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeEquityMethodInvestmentsMember
Assets Before Corporate Assets                      
Segment Reporting Information [Line Items]                      
Assets $ 4,368,789us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeCorporateAssetsMember		       $ 4,531,398us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeCorporateAssetsMember		       $ 4,368,789us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeCorporateAssetsMember		 $ 4,531,398us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= tdw_AssetsBeforeCorporateAssetsMember		 $ 3,752,542us-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.