XML 59 R47.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | Jul. 31, 2017 | Sep. 30, 2017 | Mar. 31, 2017
--- | --- | --- | ---
Stockholders Equity Note [Line Items] |  |  |
Common stock, par value |  | $ 0.001 |
Warrants issued |  | 410,262 |
Enterprise Value | $ 1,050,000 |  |
Maximum |  |  |
Stockholders Equity Note [Line Items] |  |  |
Enterprise Value | 1,250,000 |  |
Minimum |  |  |
Stockholders Equity Note [Line Items] |  |  |
Enterprise Value | $ 850,000 |  |
Predecessor |  |  |
Stockholders Equity Note [Line Items] |  |  |
Common stock, par value |  |  | $ 0.10
Reorganization Adjustments |  |  |
Stockholders Equity Note [Line Items] |  |  |
Shares issued | 18,500,000 |  |
Common stock, par value | $ 0.001 |  |
Reorganization Adjustments | Maximum |  |  |
Stockholders Equity Note [Line Items] |  |  |
Reserved shares of new common stock for issuance upon exercise | 3,000,000 |  |
Reorganization Adjustments | Common stock |  |  |
Stockholders Equity Note [Line Items] |  |  |
Per share value | $ 25 |  |
Reorganization Adjustments | Predecessor |  |  |
Stockholders Equity Note [Line Items] |  |  |
Shares issued | 1,500,000 |  |
Reorganization Adjustments | New Creditor Warrant |  |  |
Stockholders Equity Note [Line Items] |  |  |
Nominal exercise price of warrants | $ 25 |  |
Enterprise Value | $ 288,600 |  |
Reorganization Adjustments | New Creditor Warrant | Maximum |  |  |
Stockholders Equity Note [Line Items] |  |  |
Warrants exercisable period | 25 years |  |
Reorganization Adjustments | New Creditor Warrant | Common stock |  |  |
Stockholders Equity Note [Line Items] |  |  |
Nominal exercise price of warrants | $ 0.001 |  |
Reorganization Adjustments | New Creditor Warrant | Common stock | Maximum |  |  |
Stockholders Equity Note [Line Items] |  |  |
Warrants issued | 3,900,000 |  |
Reorganization Adjustments | Series A |  |  |
Stockholders Equity Note [Line Items] |  |  |
Shares issued | 2,400,000 |  |
Warrants issued | 2,400,000 |  |
Nominal exercise price of warrants | $ 2.27 |  |
Enterprise Value | $ 5,500 |  |
Reorganization Adjustments | Series A | Maximum |  |  |
Stockholders Equity Note [Line Items] |  |  |
Warrants issued | 2,400,000 |  |
Warrants exercisable period | 6 years |  |
Reorganization Adjustments | Series A | Predecessor |  |  |
Stockholders Equity Note [Line Items] |  |  |
Nominal exercise price of warrants | $ 57.06 |  |
Reorganization Adjustments | Series B |  |  |
Stockholders Equity Note [Line Items] |  |  |
Shares issued | 2,600,000 |  |
Warrants issued | 2,600,000 |  |
Nominal exercise price of warrants | $ 1.88 |  |
Enterprise Value | $ 4,900 |  |
Reorganization Adjustments | Series B | Maximum |  |  |
Stockholders Equity Note [Line Items] |  |  |
Warrants issued | 2,600,000 |  |
Reorganization Adjustments | Series B | Predecessor |  |  |
Stockholders Equity Note [Line Items] |  |  |
Nominal exercise price of warrants | $ 62.28 |  |
Reorganization Adjustments | General Unsecured Creditors |  |  |
Stockholders Equity Note [Line Items] |  |  |
Shares issued | 17,000,000 |  |
Reorganization Adjustments | General Unsecured Creditors | New Creditor Warrant |  |  |
Stockholders Equity Note [Line Items] |  |  |
Shares issued | 7,700,000 |  |
Reorganization Adjustments | Unresolved Sale Leaseback Claim | New Creditor Warrant |  |  |
Stockholders Equity Note [Line Items] |  |  |
Shares issued | 3,900,000 |  |

X
- Definition Class of warrant or right exercisable period. + References No definition available. + Details
Name: | tdw_ClassOfWarrantOrRightExercisablePeriod
Namespace Prefix: | tdw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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 Exercise price per share or per unit 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)(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 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 Aggregate number of common shares reserved for future issuance. + 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 + Details
Name: | us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of common stock. + 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 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56239-112766 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 05 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=49179835&loc=d3e54813-112758 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 + Details
Name: | us-gaap_ReorganizationValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + 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 Reference 3: 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FreshStartAdjustmentsTypeOfFreshStartAdjustmentAxis=tdw_ReorganizationAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=tdw_GeneralUnsecuredCreditorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=tdw_UnresolvedSaleLeasebackClaimMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |