Schedule of Other Current Assets (Detail) - USD ($) $ in Thousands		Dec. 31, 2015	Mar. 31, 2015
Other Current Assets, Other Assets Accrued Expenses Other Current Liabilities and other Non current liabilities and Deferred Credits [Abstract]
Deposits on vessel construction options	[1]	$ 44,748
Deposits - general		7,017	$ 7,381
Prepaid expenses		9,054	10,400
Total other current assets		$ 60,819	$ 17,781

[1] Refer to Note (7) for additional discussion regarding the vessels under construction with option agreements.