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Asset Impairments - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivatives, Fair Value [Line Items]
Increase in asset impairment charges		$ 30,800			$ 44,800
Asset impairment charges	[1]	31,672		$ 910	$ 46,630	$ 1,860
Stacked Vessels and Other Assets
Derivatives, Fair Value [Line Items]
Asset impairment charges		28,700	$ 11,700
Active Vessels
Derivatives, Fair Value [Line Items]
Asset impairment charges		$ 3,000
Vessels Under Construction
Derivatives, Fair Value [Line Items]
Asset impairment charges			2,400
Cancellation of Vessel Construction Contracts
Derivatives, Fair Value [Line Items]
Asset impairment charges			$ 800
[1] Refer to Note (15) for additional information regarding asset impairment charges.

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- Definition

Increase (Decrease) in Asset Impairment Charges

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 360



-SubTopic 10



-Section 45



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228



Reference 2: 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=56944662&loc=d3e3602-108585

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