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Sale/ Leaseback Arrangements - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Mar. 31, 2015
Vessel
Mar. 31, 2014
Vessel
Jul. 31, 2009
Entity
Vessel
Jun. 30, 2009
Entity
Vessel
Mar. 31, 2006
Vessel
Leases
Mar. 31, 2015
Vessel
Dec. 31, 2014
Vessel
Sep. 30, 2014
Vessel
Jun. 30, 2014
Vessel
Mar. 31, 2014
Vessel
Dec. 31, 2013
Vessel
Sep. 30, 2013
Vessel
Mar. 31, 2015
Vessel
Mar. 31, 2014
Vessel
Mar. 31, 2010
Mar. 31, 2006
Leases
Nov. 30, 2014
Sep. 30, 2012
Oct. 31, 2012
Sale Leaseback Transaction [Line Items]                                      
Number of vessels sold 2tdw_SaleLeasebackTransactionNumberOfVessels 3tdw_SaleLeasebackTransactionNumberOfVessels 6tdw_SaleLeasebackTransactionNumberOfVessels 6tdw_SaleLeasebackTransactionNumberOfVessels   1tdw_SaleLeasebackTransactionNumberOfVessels 3tdw_SaleLeasebackTransactionNumberOfVessels 1tdw_SaleLeasebackTransactionNumberOfVessels 1tdw_SaleLeasebackTransactionNumberOfVessels 4tdw_SaleLeasebackTransactionNumberOfVessels 4tdw_SaleLeasebackTransactionNumberOfVessels 2tdw_SaleLeasebackTransactionNumberOfVessels 6tdw_SaleLeasebackTransactionNumberOfVessels 10tdw_SaleLeasebackTransactionNumberOfVessels          
Number of unrelated third-party companies     1tdw_SaleLeasebackTransactionNumberOfUnrelatedThirdPartyCompanies 1tdw_SaleLeasebackTransactionNumberOfUnrelatedThirdPartyCompanies                              
Proceeds from sale         $ 76,500,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 13,000,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 78,200,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 19,350,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 13,400,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 63,305,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 141,900,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 65,550,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 123,950,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 270,755,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities $ 101,800,000us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities        
Deferred gain                             39,600,000us-gaap_SaleLeasebackTransactionDeferredGainGross        
Carrying value                             62,200,000us-gaap_SaleLeasebackTransactionNetBookValue        
Charter hire operating lease terms                             5 years        
Repurchase of leased vessels                           78,800,000tdw_PurchasesOfLeasedInAssets          
Number of vessels to be sold that are under construction         5tdw_SaleLeasebackTransactionNumberOfVesselsUnderConstruction                            
Number of Operating Lease         5tdw_NumberOfOperatingLeases                     5tdw_NumberOfOperatingLeases      
Length of extension period, years                               8 years      
Third and Fourth PSV                                      
Sale Leaseback Transaction [Line Items]                                      
Repurchase of leased vessels   22,800,000tdw_PurchasesOfLeasedInAssets
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= tdw_ThirdAndFourthVesselsMember		                                  
Fifth Vessel                                      
Sale Leaseback Transaction [Line Items]                                      
Repurchase of leased vessels                                 11,200,000tdw_PurchasesOfLeasedInAssets
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= tdw_FifthVesselMember		    
First PSV                                      
Sale Leaseback Transaction [Line Items]                                      
Repurchase of leased vessels                                   8,800,000tdw_PurchasesOfLeasedInAssets
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= tdw_VesselOneMember		  
Second PSV                                      
Sale Leaseback Transaction [Line Items]                                      
Repurchase of leased vessels                                     $ 8,400,000tdw_PurchasesOfLeasedInAssets
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= tdw_VesselTwoMember