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Valuation and Qualifying Accounts (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2014
Venezuela Customer
Valuation and Qualifying Accounts Disclosure [Line Items]
Amount uncollectible and removed from account receivable	$ 637us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs / tdw_SubsidiaryAxis = tdw_VenezuelaOperationsMember
Revaluation allowance for doubtful accounts	3,852us-gaap_DebtorReorganizationItemsRevaluationOfCustomerRelatedObligations / tdw_SubsidiaryAxis = tdw_VenezuelaOperationsMember
Mexico Customer
Valuation and Qualifying Accounts Disclosure [Line Items]
Collections from accounts receivable		3,151us-gaap_ProceedsFromCustomers / us-gaap_ValuationAllowancesAndReservesTypeAxis = tdw_MexicoCustomerMember
Amount uncollectible and removed from account receivable		$ 8,843us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs / us-gaap_ValuationAllowancesAndReservesTypeAxis = tdw_MexicoCustomerMember

X

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.4)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 954

-SubTopic 310

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35755819&loc=SL9156395-115594

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of reorganization items related to revaluation of customer-related obligations such as, for example, changes in frequent flyer obligations in the airline industry.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 55

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56145-112766



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=6916575&loc=d3e55730-112764

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Cash receipts from customers during the current period which are usually for sales of goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

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Period Type:	duration

X

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Details

Name:	tdw_SubsidiaryAxis=tdw_VenezuelaOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: