XML 63 R36.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 9 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 | May 31, 2014 | May 31, 2013
May 2014 Authorized Amount |  |  |
Stockholders Equity Note [Line Items] |  |  |
Amount authorized to repurchase shares |  | $ 200.0 us-gaap_StockRepurchaseProgramAuthorizedAmount1 / us-gaap_ShareRepurchaseProgramAxis = tdw_MayTwoThousandFourteenAuthorizedAmountMember |
Amount remaining to repurchase shares | 100.0 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 / us-gaap_ShareRepurchaseProgramAxis = tdw_MayTwoThousandFourteenAuthorizedAmountMember |  |
May 2013 Authorized Amount |  |  |
Stockholders Equity Note [Line Items] |  |  |
Amount authorized to repurchase shares |  |  | $ 200.0 us-gaap_StockRepurchaseProgramAuthorizedAmount1 / us-gaap_ShareRepurchaseProgramAxis = tdw_MayTwoThousandThirteenAuthorizedAmountMember
Number of shares repurchased | 0 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_ShareRepurchaseProgramAxis = tdw_MayTwoThousandThirteenAuthorizedAmountMember |  |

X
- Details
Name: | tdw_StockholdersEquityNoteLineItems
Namespace Prefix: | tdw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 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=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=tdw_MayTwoThousandFourteenAuthorizedAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=tdw_MayTwoThousandThirteenAuthorizedAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |