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Employee Retirement Plans - Additional Information (Detail) (USD $)
 1 Months Ended 12 Months Ended 3 Months Ended
Dec. 31, 2010
Person
Mar. 31, 2015
Person
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2012
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Number of employers participated in defined benefit plan 60tdw_DefinedBenefitPlanNumberOfEmployeesParticipating        
Number of employers still remains in defined benefit plan   45tdw_DefinedBenefitPlanNumberOfEmployeesRemainingInPlan      
Percentage of defined benefit plan, actuarial discount rate assumption   4.00%tdw_DefinedBenefitPlanActuarialDiscountRateAssumption      
Defined benefit plan, significant concentrations of risk   The pension plan and the supplemental plan assets are periodically evaluated for concentration risks. As of March 31, 2015, the company did not have any individual asset investments that comprised 10% or more of each plan's overall assets.      
Defined benefit plan, concentration risk, assets, debt securities, maximum single issuer   5.00%tdw_DefinedBenefitPlanConcentrationRiskAssetsDebtSecuritiesMaximumSingleIssuer      
Defined benefit plan, concentration risk, assets, debt securities, maximum value single issuer   $ 2,500,000tdw_DefinedBenefitPlanConcentrationRiskAssetsDebtSecuritiesMaximumValueSingleIssuer      
Defined benefit plan, concentration risk, assets, equity securities, difference plan assets and liabilities   15.00%tdw_DefinedBenefitPlanConcentrationRiskAssetsEquitySecuritiesDifferencePlanAssetsAndLiabilities      
Defined benefit plan, concentration risk, assets, equity securities, maximum single investment   5.00%tdw_DefinedBenefitPlanConcentrationRiskAssetsEquitySecuritiesMaximumSingleInvestment      
Defined benefit plan, concentration risk, assets, equity securities, maximum foreign and us stock   10.00%tdw_DefinedBenefitPlanConcentrationRiskAssetsEquitySecuritiesMaximumOfForeignAndUsStock      
Defined benefit plan, concentration risk, diversification, equity limit, single industry   25.00%tdw_DefinedBenefitPlanConcentrationRiskDiversificationEquityLimitSingleIndustry      
Defined benefit plan, concentration risk, diversification, equity limit, single corporation   10.00%tdw_DefinedBenefitPlanConcentrationRiskDiversificationEquityLimitSingleCorporation      
Defined benefit plan, concentration risk, diversification, debt limit, single issuer   10.00%tdw_DefinedBenefitPlanConcentrationRiskDiversificationDebtLimitSingleIssuer      
Retirement Contributions          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined contribution plan, company contribution percentage   3.00%tdw_DefinedContributionPlanCompanyContributionPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_RetirementPlansContributionsMember		      
Defined contribution plan, company contribution, vesting period, years   5tdw_DefinedContributionPlanCompanyContributionVestingPeriod
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_RetirementPlansContributionsMember		      
Retirement Contributions | Minimum          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined contribution plan, company contribution percentage additional percentage   1.00%tdw_DefinedContributionPlanCompanyContributionPercentageAdditionalPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_RetirementPlansContributionsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
Retirement Contributions | Maximum          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined contribution plan, company contribution percentage additional percentage   8.00%tdw_DefinedContributionPlanCompanyContributionPercentageAdditionalPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_RetirementPlansContributionsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		      
Defined Contribution Pension Plan 401k          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined contribution plan, company contribution, vesting period, years   5tdw_DefinedContributionPlanCompanyContributionVestingPeriod
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_DefinedContributionPensionPlanFourZeroOneKMember		      
Percentage of defined plan, minimum employee contribution   2.00%tdw_DefinedContributionPlanPercentContributedByEmployeeMinimum
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_DefinedContributionPensionPlanFourZeroOneKMember		      
Percentage of defined plan, maximum employee contribution   75.00%tdw_DefinedContributionPlanPercentContributedByEmployeeMaximum
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_DefinedContributionPensionPlanFourZeroOneKMember		      
Defined contribution plan, company contribution percentage match, common stock   50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_DefinedContributionPensionPlanFourZeroOneKMember		      
Defined contribution plan, company contribution percentage match, common stock   8.00%tdw_DefinedContributionPlanCompanyContributionPercentageMatchCommonStock
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_DefinedContributionPensionPlanFourZeroOneKMember		      
Non-Qualified Supplemental Savings Plan Executives          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined contribution plan, company contribution percentage match, common stock   50.00%tdw_DefinedContributionPlanCompanyContributionPercentageMatchCommonStock
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_NonQualifiedSupplementalSavingsPlanExecutivesMember		      
Deferred compensation arrangement with individual, deferred compensation percentage   50.00%tdw_DeferredCompensationArrangementWithIndividualDeferredCompensationPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_NonQualifiedSupplementalSavingsPlanExecutivesMember		      
Deferred compensation arrangement with individual, deferred bonus percentage   100.00%tdw_DeferredCompensationArrangementWithIndividualDeferredBonusPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_NonQualifiedSupplementalSavingsPlanExecutivesMember		      
Defined contribution plan, restoration benefit   3.00%tdw_DefinedContributionPlanRestorationBenefit
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_NonQualifiedSupplementalSavingsPlanExecutivesMember		      
Non-Qualified Supplemental Savings Plan Executives | Minimum          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined contribution plan, company contribution percentage additional percentage   1.00%tdw_DefinedContributionPlanCompanyContributionPercentageAdditionalPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_NonQualifiedSupplementalSavingsPlanExecutivesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
Non-Qualified Supplemental Savings Plan Executives | Maximum          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined contribution plan, company contribution percentage additional percentage   8.00%tdw_DefinedContributionPlanCompanyContributionPercentageAdditionalPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_NonQualifiedSupplementalSavingsPlanExecutivesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		      
Multinational Pension Savings Plan          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined contribution plan, company contribution, vesting period, years   6tdw_DefinedContributionPlanCompanyContributionVestingPeriod
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_MultinationalPensionSavingsPlanMember		      
Percentage of defined plan, minimum employee contribution   1.00%tdw_DefinedContributionPlanPercentContributedByEmployeeMinimum
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_MultinationalPensionSavingsPlanMember		      
Percentage of defined plan, maximum employee contribution   15.00%tdw_DefinedContributionPlanPercentContributedByEmployeeMaximum
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_MultinationalPensionSavingsPlanMember		      
Percentage of defined plan, company contribution match, cash   50.00%tdw_DefinedContributionPlanCompanyContributionPercentageMatchCash
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_MultinationalPensionSavingsPlanMember		      
Percentage of defined plan, company contribution match, employee deferred compensation   6.00%tdw_DefinedContributionPlanCompanyContributionPercentageMatchDeferredCompensation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= tdw_MultinationalPensionSavingsPlanMember		      
Pension Plans, Defined Benefit          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined benefit plan, employer contributions     0us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		 0us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		  
Supplemental Executive Retirement Plan          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Defined benefit plan, employer contributions   0us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember		 0us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember		    
Chief Executive Officer          
Schedule Of Defined Benefit Plans Disclosures [Line Items]          
Distribution in settlement of plan obligation         13,000,000us-gaap_DefinedBenefitPlanBenefitsPaid
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
Settlement loss recognized       $ (5,200,000)us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember		 $ 5,200,000us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember