XML 64 R49.htm IDEA: XBRL DOCUMENT v3.8.0.1

Components of Basic and Diluted Loss Per Share (Parenthetical) (Detail) - shares	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Shares issuable upon exercise of warrants	108,044
Common shares outstanding	23,988,075	22,115,916
Warrants outstanding	6,021,696
Common shares and new creditor warrants outstanding	30,009,771
Out-of-the-money Warrants
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Warrants outstanding	5,062,089

X

- Definition

Common stock shares and class of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	tdw_CommonStockSharesAndClassOfWarrantsOrRightsOutstanding
Namespace Prefix:	tdw_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Schedule Of Earnings Per Share Basic And Diluted [Line Items]

+ References

No definition available.

+ Details

Name:	tdw_ScheduleOfEarningsPerShareBasicAndDilutedLineItems
Namespace Prefix:	tdw_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: 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(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=tdw_OutOfTheMoneyWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: