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Summary of Goodwill as a Percentage of Total Assets and Stockholders' Equity (Detail)	Mar. 31, 2014
Goodwill [Line Items]
Goodwill as a percentage of total assets	6.00%tdw_GoodwillPercentageOfTotalAssets
Goodwill as a percentage of stockholders' equity	11.00%tdw_GoodwillPercentageOfStockholdersEquity

X

- Definition

Goodwill, Percentage of Stockholders' Equity

+ References

No definition available.

+ Details

Name:	tdw_GoodwillPercentageOfStockholdersEquity
Namespace Prefix:	tdw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Goodwill, Percentage of Total Assets

+ References

No definition available.

+ Details

Name:	tdw_GoodwillPercentageOfTotalAssets
Namespace Prefix:	tdw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_GoodwillLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration