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v2.4.1.9

Schedule of Tax Rate Applicable to Pre-Tax Earning, U.S. Federal Statutory Rate (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Reconciliation of Statutory Federal Tax Rate [Line Items] |  |  |
Computed "expected" tax expense | $ (23,193)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 60,567 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 68,307 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Foreign income taxed at different rates | (13,570)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (18,536)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (23,965)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Foreign tax credits not previously recognized |  | (483)tdw_ForeignTaxCreditsNotPreviouslyRecognized | (398)tdw_ForeignTaxCreditsNotPreviouslyRecognized
Expenses which are not deductible for tax purposes | 472 tdw_IncomeTaxExpensesNotDeductibleForTaxPurposes | 720 tdw_IncomeTaxExpensesNotDeductibleForTaxPurposes | 498 tdw_IncomeTaxExpensesNotDeductibleForTaxPurposes
Non-deductible goodwill | 15,811 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses | 2,941 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses |
Reversal of basis difference - sale leaseback |  | (3,369)tdw_SaleLeasebackTransactionTransferTaxes |
Valuation allowance - deferred tax assets | 17,829 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | (5,821)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 5,821 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Amortization of deferrals associated with intercompany sales to foreign tax jurisdictions | (2,358)us-gaap_IncomeTaxReconciliationNondeductibleExpenseAmortization | (1,475)us-gaap_IncomeTaxReconciliationNondeductibleExpenseAmortization | (6,232)us-gaap_IncomeTaxReconciliationNondeductibleExpenseAmortization
Expenses which are not deductible for book purposes | (832)tdw_IncomeTaxExpensesNotDeductibleForBookPurposes | (2,144)tdw_IncomeTaxExpensesNotDeductibleForBookPurposes |
Foreign taxes | 5,688 us-gaap_IncomeTaxReconciliationTaxCreditsForeign |  |
State taxes | (6)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 3 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | (203)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Other, net | (918)us-gaap_IncomeTaxReconciliationOtherAdjustments | 390 us-gaap_IncomeTaxReconciliationOtherAdjustments | 585 us-gaap_IncomeTaxReconciliationOtherAdjustments
Income tax expense (benefit), Total | $ (1,077)us-gaap_IncomeTaxExpenseBenefit | $ 32,793 us-gaap_IncomeTaxExpenseBenefit | $ 44,413 us-gaap_IncomeTaxExpenseBenefit

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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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