XML 54 R40.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Schedule of Unrecognized Tax Benefits Which Would Lower Effective Tax Rate if Realized (Detail) - State and Local Jurisdiction $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2016 USD ($)
Income Tax Contingency [Line Items] |
Unrecognized tax benefit related to state tax issues | $ 11,992
Interest receivable on unrecognized tax benefit related to state tax issues | $ 42

X
- Definition This element represents an interest income receivable on an uncertain tax position. + References No definition available. + Details
Name: | tdw_UnrecognizedTaxBenefitInterestIncomeReceivable
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The gross amount of unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return. + References No definition available. + Details
Name: | tdw_UnrecognizedTaxBenefitsCurrentAndPriorPeriodTaxPositions
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_IncomeTaxContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |