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Note 7 - Affiliates Balances (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2022
Notes Tables |
Schedule of Related Party Transactions [Table Text Block] |
(In Thousands) |  |  |  |  |  |  |  |
|  | March 31, 2022 |  |  | December 31, 2021 |
Due from affiliates: |  |  |  |  |  |  |  |
Angolan joint venture (Sonatide) |  | $ | — |  |  | $ | 49,011 |
Nigerian joint venture (DTDW) |  |  | 21,191 |  |  |  | 21,123 |
|  |  | 21,191 |  |  |  | 70,134 |
Due to affiliates: |  |  |  |  |  |  |  |
Sonatide |  | $ | — |  |  | $ | 40,432 |
DTDW |  |  | 21,191 |  |  |  | 21,123 |
|  |  | 21,191 |  |  |  | 61,555 |
Net due from affiliates |  | $ | — |  |  | $ | 8,579 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed [Table Text Block] |
(In Thousands) |  |  |  |
Assets |  |  |  |
Current assets |  | $ | 12,894 |
Net properties and equipment and other assets |  |  | 2,908 |
Total assets |  |  | 15,802 |
Liabilities |  |  |  |
Current liabilities |  |  | 283 |
Other liabilities |  |  | 2,996 |
Total liabilities |  |  | 3,279 |
Net assets acquired |  |  | 11,223 |
Bargain purchase gain |  | $ | 1,300 |

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- Definition Tabular disclosure of the acquisition of assets and assumptions of liabilities in the business combination. + References No definition available. + Details
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Namespace Prefix: | tdw_
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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration