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Schedule of Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Mar. 31, 2014
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Other Assets, Accrued Expenses, Other Current Liabilities, And Other Liabilities And Deferred Credits [Abstract] |  |
Taxes payable | $ 56,600 | $ 56,080
Deferred gain on vessel sales-current | 16,701 | 13,996
Other | 652 | 491
Other current liabilities | $ 73,953 | $ 70,567

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