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Schedule of Stock Option Compensation Expense (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option compensation expense	$ 71us-gaap_AllocatedShareBasedCompensationExpense	$ 12us-gaap_AllocatedShareBasedCompensationExpense	$ 2,049us-gaap_AllocatedShareBasedCompensationExpense
Basic earnings per share reduced by	$ 0.00tdw_ShareBasedCompensationEffectOfChangeOnBasicEarningsPerShare	$ 0.00tdw_ShareBasedCompensationEffectOfChangeOnBasicEarningsPerShare	$ 0.03tdw_ShareBasedCompensationEffectOfChangeOnBasicEarningsPerShare
Diluted earnings per share reduced by	$ 0.00tdw_ShareBasedCompensationEffectOfChangeOnDilutedEarnings	$ 0.00tdw_ShareBasedCompensationEffectOfChangeOnDilutedEarnings	$ 0.03tdw_ShareBasedCompensationEffectOfChangeOnDilutedEarnings

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- Definition

Share Based Compensation, Effect of Change on Basic Earnings Per Share

+ References

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- Definition

Share Based Compensation, Effect of Change on Diluted Earnings

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Paragraph 2

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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