Interest Expense, Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest Income (Expense), Net [Abstract]
Interest (Income)	$ (1)	$ (3)	$ (2)	$ (4)
Interest Expense	4,410	3,342	8,969	6,893
Interest Expense - Income Taxes	163	91	326	188
Other Expenses	223	118	457	236
Interest Expense, net	$ 4,795	$ 3,548	$ 9,750	$ 7,313