XML 1066 R139.htm IDEA: XBRL DOCUMENT

Schedule of Gain on Disposition of Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015 Vessel	Mar. 31, 2014 Vessel	Mar. 31, 2013 Vessel
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]
Gain on vessels disposed	$ 4,275us-gaap_GainLossOnDispositionOfAssets	$ (1,537)us-gaap_GainLossOnDispositionOfAssets	$ 3,590us-gaap_GainLossOnDispositionOfAssets	$ 2,943us-gaap_GainLossOnDispositionOfAssets	$ 2,363us-gaap_GainLossOnDispositionOfAssets	$ 7,170us-gaap_GainLossOnDispositionOfAssets	$ 49us-gaap_GainLossOnDispositionOfAssets	$ 2,140us-gaap_GainLossOnDispositionOfAssets	$ 9,271us-gaap_GainLossOnDispositionOfAssets	$ 11,722us-gaap_GainLossOnDispositionOfAssets	$ 6,609us-gaap_GainLossOnDispositionOfAssets
Number of vessels disposed									13tdw_NumberOfVesselsSoldOrScrapped	48tdw_NumberOfVesselsSoldOrScrapped	32tdw_NumberOfVesselsSoldOrScrapped
Vessels
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]
Gain on vessels disposed									$ 2,988	$ 12,247	$ 12,191