XML 43 R43.htm IDEA: XBRL DOCUMENT
v3.19.3

Stockholders' Equity and Dilutive Equity Instruments - Additional Information (Detail) - $ / shares | 9 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
In-the-money Warrants and Restricted Stock Awards and Units |  |
Stockholders Equity Note [Line Items] |  |
Incremental "in-the-money" warrants, and restricted stock awards and units | 3,397,110 | 5,143,206
Out-of-the-money Warrants |  |
Stockholders Equity Note [Line Items] |  |
Warrants outstanding | 5,923,399 | 5,062,089
Out-of-the-money Warrants | Series A Warrants |  |
Stockholders Equity Note [Line Items] |  |
Warrants exercise prices | $ 57.06 | $ 57.06
Out-of-the-money Warrants | Series B Warrants |  |
Stockholders Equity Note [Line Items] |  |
Warrants exercise prices | 62.28 | 62.28
Out-of-the-money Warrants | GLF Equity Warrants |  |
Stockholders Equity Note [Line Items] |  |
Warrants exercise prices | $ 100 | $ 100

X
- Definition Stockholders Equity Note [Line Items] + References No definition available. + Details
Name: | tdw_StockholdersEquityNoteLineItems
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=tdw_InTheMoneyOptionsWarrantsAndRestrictedStockAwardsAndUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=tdw_SeriesAWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=tdw_SeriesBWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=tdw_GLFEquityWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |