XML 37 R52.htm IDEA: XBRL DOCUMENT v2.4.1.9
Indebtedness - Additional Information (Detail)
 9 Months Ended 3 Months Ended
Dec. 31, 2013
USD ($)
Sep. 30, 2013
Troms Offshore Supply AS
Public bonds
USD ($)
Sep. 30, 2013
Troms Offshore Supply AS
Public bonds
NOK
Sep. 30, 2013
Minimum
Troms Offshore Supply AS
Public bonds
Debt [Line Items]        
Debt extinguished amount   $ 82,100,000us-gaap_RepaymentsOfSecuredDebt
/ us-gaap_InvestmentTypeAxis
= us-gaap_BondsMember
/ dei_LegalEntityAxis
= tdw_TromsOffshoreSupplyAsMember		 500,000,000us-gaap_RepaymentsOfSecuredDebt
/ us-gaap_InvestmentTypeAxis
= us-gaap_BondsMember
/ dei_LegalEntityAxis
= tdw_TromsOffshoreSupplyAsMember		  
Repayment of bond at average price as a percentage of par value   105.00%tdw_LongTermDebtAveragePricePercentageOfParValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_BondsMember
/ dei_LegalEntityAxis
= tdw_TromsOffshoreSupplyAsMember		 105.00%tdw_LongTermDebtAveragePricePercentageOfParValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_BondsMember
/ dei_LegalEntityAxis
= tdw_TromsOffshoreSupplyAsMember		  
Loss on early extinguishment of bond $ (4,144,000)us-gaap_GainsLossesOnExtinguishmentOfDebt $ (4,100,000)us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_InvestmentTypeAxis
= us-gaap_BondsMember
/ dei_LegalEntityAxis
= tdw_TromsOffshoreSupplyAsMember		 (26,000,000)us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_InvestmentTypeAxis
= us-gaap_BondsMember
/ dei_LegalEntityAxis
= tdw_TromsOffshoreSupplyAsMember		  
Interest rate       5.40%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_InvestmentTypeAxis
= us-gaap_BondsMember
/ dei_LegalEntityAxis
= tdw_TromsOffshoreSupplyAsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Debt instrument maturity, month and year   2016-04 2016-04