Schedule of Accrued Expenses (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]
Payroll and related payables		$ 22,405	$ 32,041
Commissions payable	[1]	7,197	8,282
Accrued vessel expenses		53,414	79,549
Accrued interest expense		4,791	14,514
Other accrued expenses		8,797	11,869
Accrued expenses		$ 96,604	$ 146,255

[1] Excludes $27.3 million and $46.3 million of commissions due to Sonatide at December 31, 2015 and March 31, 2015, respectively. These amounts are included in amounts due to affiliate.