XML 75 R61.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Commitments and Contingencies (Brazilian Customs) - Additional Information (Detail) BRL in Millions, $ in Millions | 1 Months Ended |
--- | --- | ---
Apr. 30, 2011 BRL Vessel | Dec. 31, 2015 USD ($) | Dec. 31, 2015 BRL
Commitments And Contingencies Disclosure [Abstract] |  |  |
Fines assessed | BRL 155 | $ 39.0 |
Number of Tidewater vessels that the subsidiaries failed to obtain import licenses from | 17 |  |
Fines assessed |  | $ 8.3 | BRL 33

X
- Definition Assessed fine original. + References No definition available. + Details
Name: | tdw_AssessedFineOriginal
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Assessed fine reduced. + References No definition available. + Details
Name: | tdw_AssessedFineReduced
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of vessels that subsidiaries failed to obtain import licenses. + References No definition available. + Details
Name: | tdw_NumberOfVesselsThatSubsidiariesFailedToObtainImportLicenses
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration