Schedule of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
Other Assets, Accrued Expenses, Other Current Liabilities, And Other Liabilities And Deferred Credits [Abstract]
Payroll and related payables	$ 32,035	$ 27,248
Commissions payable	7,079	8,263
Accrued vessel expenses	83,399	96,468
Accrued interest expense	12,911	14,816
Other accrued expenses	8,711	10,507
Accrued expenses	$ 144,135	$ 157,302

Carrying value as of the balance sheet date of obligations incurred through that date and payable for sales commissions. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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