XML 68 R60.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Fresh-Start Accounting - Additional Information (Detail) $ in Thousands | Jul. 31, 2017 USD ($)
--- | ---
Fresh Start Accounting [Line Items] |
Enterprise value of successor entity | $ 1,050,000
Enterprise value for deriving equity value | 1,055,000
Minimum |
Fresh Start Accounting [Line Items] |
Enterprise value of successor entity | 850,000
Enterprise value for deriving equity value | 743,000
Maximum |
Fresh Start Accounting [Line Items] |
Enterprise value of successor entity | 1,250,000
Enterprise value for deriving equity value | $ 1,143,000
Plan of Reorganization |
Fresh Start Accounting [Line Items] |
Fresh start adjustment, description | Upon the company's emergence from Chapter 11 bankruptcy, the company qualified for and adopted fresh-start accounting in accordance with the provisions set forth in ASC 852 as (i) holders of existing shares of the Predecessor immediately before the Effective Date received less than 50 percent of the voting shares of the Successor entity and (ii) the reorganization value of the Successor was less than its post-petition liabilities and estimated allowed claims immediately before the Effective Date.
Predecessor shareholders percentage of voting shares of successor entity | 50.00%
Percentage of weighted average cost of capital | 12.00%

X
- Definition Enterprise value for deriving equity value. + References No definition available. + Details
Name: | tdw_EnterpriseValueForDerivingEquityValue
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fresh start accounting. + References No definition available. + Details
Name: | tdw_FreshStartAccountingLineItems
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of weighted average cost of capital. + References No definition available. + Details
Name: | tdw_PercentageOfWeightedAverageCostOfCapital
Namespace Prefix: | tdw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Predecessor shareholders percentage of voting shares of successor entity. + References No definition available. + Details
Name: | tdw_PredecessorShareholdersPercentageOfVotingSharesOfSuccessorEntity
Namespace Prefix: | tdw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The effect of the fresh-start adjustment on asset, liability and equity accounts included in the preconfirmation balance sheet that is the basis to arrive at the postconfirmation balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a)-(b) -URI http://asc.fasb.org/extlink&oid=6918054&loc=SL2890621-112765 + Details
Name: | us-gaap_FreshStartAdjustmentDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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://fasb.org/us-gaap/role/ref/legacyRef -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 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -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
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringPlanAxis=tdw_PlanOfReorganizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |