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Summary of Net Properties and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Property Plant And Equipment [Line Items]
Vessels and related equipment	$ 854,403
Other properties and equipment	22,424
Properties and equipment, gross	876,827
Less accumulated depreciation and amortization	8,138
Net properties and equipment	$ 868,689
Predecessor
Property Plant And Equipment [Line Items]
Vessels and related equipment		$ 3,407,760
Other properties and equipment		69,670
Properties and equipment, gross		3,477,430
Less accumulated depreciation and amortization		612,668
Net properties and equipment		$ 2,864,762

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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