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Schedule of Accrued Property and Liability Losses (Detail) (Accrued property and liability losses, USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accrued property and liability losses
Schedule of Accrued Liabilities [Line Items]
Accrued property and liability losses	$ 14,203us-gaap_AccruedLiabilitiesCurrentAndNoncurrent / tdw_AccruedExpensesAndOtherPayablesAxis = tdw_AccruedLiabilitiesAndOtherLiabilitiesMember	$ 8,917us-gaap_AccruedLiabilitiesCurrentAndNoncurrent / tdw_AccruedExpensesAndOtherPayablesAxis = tdw_AccruedLiabilitiesAndOtherLiabilitiesMember

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

-Article 7



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

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