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Goodwill - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended | 3 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2015 | Mar. 31, 2014 | Jun. 30, 2014
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill impairment charge | $ 283,699 us-gaap_GoodwillImpairmentLoss | $ 56,283 us-gaap_GoodwillImpairmentLoss | $ 283,699 us-gaap_GoodwillImpairmentLoss | [1] | $ 56,283 us-gaap_GoodwillImpairmentLoss |  |
Goodwill |  |  |  |  | 42,160 us-gaap_GoodwillAcquiredDuringPeriod | [2] |
Asia/Pacific |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill impairment charge |  | 56,300 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  |  | 56,283 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = tdw_AsiaPacificSegmentMember |  |
Goodwill impairment test period |  | 10 years |  |  |  |  |
Sub-Saharan Africa/Europe |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill impairment charge |  |  | 169,462 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  |  |  |
Goodwill |  |  |  |  | $ 42,160 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember |  | $ 42,200 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = tdw_SubSaharanAfricaAndEuropeMember
[1] | The total carrying amount of goodwill at December 31, 2014 is net of accumulated impairment charges of $370.9 million.
[2] | 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.

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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of loss from the write-down of an asset representing the 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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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