Asset Impairments - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Increase in asset impairment charges		$ 8,900		$ 53,700
Asset impairment charges	[1]	15,141	$ 6,236	61,771	$ 8,096
Stacked Vessels and Other Assets
Derivatives, Fair Value [Line Items]
Asset impairment charges		$ 15,200		55,500
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.