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Allocation of Purchase Price for Acquisition (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Mar. 31, 2013 | Jun. 30, 2013 | Jun. 04, 2013
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Business Combination Allocation of Purchase Price [Line Items] |  |  |  |  |  |  |
Goodwill | $ 283,699 us-gaap_Goodwill | [1],[2] | $ 297,822 us-gaap_Goodwill | [1] |  |  |
Troms Offshore Supply AS |  |  |  |  |  |  |
Business Combination Allocation of Purchase Price [Line Items] |  |  |  |  |  |  |
Cash |  |  |  |  |  | 22,263 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = tdw_TromsOffshoreSupplyAsMember |
Trade receivables and other current assets |  |  |  |  |  | 9,816 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / us-gaap_BusinessAcquisitionAxis = tdw_TromsOffshoreSupplyAsMember |
Vessels |  |  |  |  |  | 245,605 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = tdw_TromsOffshoreSupplyAsMember | [3]
Goodwill |  |  |  |  | 42,200 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = tdw_TromsOffshoreSupplyAsMember | 42,160 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = tdw_TromsOffshoreSupplyAsMember | [4]
Payable and other liabilities |  |  |  |  |  | (13,020)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = tdw_TromsOffshoreSupplyAsMember |
Notes payable |  |  |  |  |  | (156,824)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = tdw_TromsOffshoreSupplyAsMember |
Total purchase price |  |  |  |  |  | $ 150,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = tdw_TromsOffshoreSupplyAsMember |
[1] | The total carrying amount of goodwill at December 31, 2013 is net of accumulated impairment charges $30.9 million and $56.3 million related to the Middle East/North Africa and Asia/Pacific segments, respectively.
[2] | The total carrying amount of goodwill at December 31, 2014 is net of accumulated impairment charges of $370.9 million.
[3] | Includes $10.7 million in costs attributed to vessels under construction.
[4] | Subsequently written off in December 2014.

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of other assets expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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