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Schedule of Other Current Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Mar. 31, 2016
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] $ 50 $ 30,285
Deposits - general 12,670 8,076
Prepaid expenses 9,333 6,394
Total other current assets $ 22,053 $ 44,755
[1] Refer to Note (8) for additional discussion regarding the vessels under construction with option agreements.