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Acquisition - Additional Information (Detail) (USD $)
 0 Months Ended
Jun. 04, 2013
Mar. 31, 2014
Mar. 31, 2013
Jun. 30, 2013
Business Acquisition [Line Items]        
Business acquisition, Goodwill   $ 283,699,000us-gaap_Goodwill [1],[2] $ 297,822,000us-gaap_Goodwill [1]  
Troms Offshore Supply AS        
Business Acquisition [Line Items]        
Business acquisition, description of acquired entity Troms Offshore owned four deepwater PSVs, and had two additional deepwater PSVs under construction, one delivered shortly after the acquisition and the other delivered in January 2014.      
Business acquisition, cash paid 150,000,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= tdw_TromsOffshoreSupplyAsMember		      
Business acquisition, debt assumed 261,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= tdw_TromsOffshoreSupplyAsMember		      
Business acquisition, Goodwill $ 42,160,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= tdw_TromsOffshoreSupplyAsMember		 [3]     $ 42,200,000us-gaap_Goodwill
/ 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] Subsequently written off in December 2014.