XML 1071 R136.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Fair Value Measurements and Disclosures - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Mar. 31, 2015 Contract | Mar. 31, 2014 Contract
Derivatives, Fair Value [Line Items] |  |
Cash equivalents maturity period, days | 90 days |
Number of contracts outstanding | 2 us-gaap_DerivativeNumberOfInstrumentsHeld | 4 us-gaap_DerivativeNumberOfInstrumentsHeld
Notional value of foreign exchange contract | $ 2.3 tdw_NotionalValueEquivalentOfForwardContract | $ 2.3 tdw_NotionalValueEquivalentOfForwardContract

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- Definition Notional Value Equivalent of Forward Contract + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Short Term Deposits Maximum Maturity Period + References No definition available. + Details
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Namespace Prefix: | tdw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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