XML 45 R32.htm IDEA: XBRL DOCUMENT
v3.19.1

ASSET IMPAIRMENTS (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2019
Asset Impairment Charges [Abstract] |
Summary of Impairments | The below table summarizes impairments during the quarters ended March 31, 2019 and 2018, along with the amount of impairment.
|  | Three Months |  |  | Three Months |
|  | Ended |  |  | Ended |
(Dollars in thousands) |  | March 31, 2019 |  |  | March 31, 2018 |
Number of vessels impaired in the period |  |  | — |  |  |  | 13 |
Amount of impairment incurred |  | $ | — |  |  |  | 6,186 |

X
- Definition Asset Impairment Charges Table [Text Block] + References No definition available. + Details
Name: | tdw_AssetImpairmentChargesTableTextBlock
Namespace Prefix: | tdw_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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