XML 79 R63.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Note 7 - Assets Held for Sale, Asset Sales and Asset Impairments - Activity in Assets Held for Sale (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Beginning balance | 23 |  |
Additions | 7 | 32 | 46
Sales |  | (53) |
Reactivation | (1) | 0 | 0
Ending balance | 18 | 23 |
Vessels Held for Sale [Member] |  |  |
Beginning balance | 23 | 46 | 0
Beginning balance | $ 34,396 | $ 39,287 | $ 0
Additions | 7 | 32 | 46
Additions | $ 18,096 | $ 97,663 | $ 66,033
Sales | (9) | (53) | 0
Sales | $ (15,433) | $ (26,877) | $ 0
Reactivation | (3) | (2) | 0
Reactivation | $ (7,250) | $ (500) | $ 0
Impairment | $ (15,388) | $ (75,177) | $ (26,746)
Ending balance | 18 | 23 | 46
Ending balance | $ 14,421 | $ 34,396 | $ 39,287

X
- Definition Additional impairment from assets held for sale. + References No definition available. + Details
Name: | tdw_AdditionalImpairmentFromAssetsHeldForSale
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of additions to assets held for sale during the period. + References No definition available. + Details
Name: | tdw_AssetsHeldForSaleAdditions
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The value of assets held for sale are reactivated during period. + References No definition available. + Details
Name: | tdw_AssetsHeldForSaleReactivation
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of sales of assets held for sale during the period. + References No definition available. + Details
Name: | tdw_AssetsHeldForSaleSales
Namespace Prefix: | tdw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of vessels classified as held for sale. + References No definition available. + Details
Name: | tdw_NumberOfVesselsHeldForSale
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of vessels are classified as held for sale during period. + References No definition available. + Details
Name: | tdw_NumberOfVesselsHeldForSaleAddition
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of vessels classified as held for sale reactivated during period. + References No definition available. + Details
Name: | tdw_NumberOfVesselsHeldForSaleReactivation
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of vessels classified as held for sale are sold during period. + References No definition available. + Details
Name: | tdw_NumberOfVesselsHeldForSaleSold
Namespace Prefix: | tdw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of assets held-for-sale that are not part of a disposal group. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 15 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123398962&loc=d3e400-110220 + Details
Name: | us-gaap_AssetsHeldForSaleNotPartOfDisposalGroup
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=tdw_VesselsHeldForSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |