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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 $ 283,699us-gaap_GoodwillImpairmentLoss $ 56,283us-gaap_GoodwillImpairmentLoss $ 283,699us-gaap_GoodwillImpairmentLoss [1] $ 56,283us-gaap_GoodwillImpairmentLoss  
Goodwill       42,160us-gaap_GoodwillAcquiredDuringPeriod [2]  
Asia/Pacific          
Goodwill [Line Items]          
Goodwill impairment charge   56,300us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		   56,283us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_AsiaPacificSegmentMember		  
Goodwill impairment test period   10 years      
Sub-Saharan Africa/Europe          
Goodwill [Line Items]          
Goodwill impairment charge     169,462us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		    
Goodwill       $ 42,160us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_StatementBusinessSegmentsAxis
= tdw_SubSaharanAfricaAndEuropeMember		 $ 42,200us-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.