Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Income Tax Disclosure [Abstract]
Income taxes paid	$ 20,791,000	$ 9,663,000	$ 12,935,000
Prepaid expenses and taxes	1,346,000	2,833,000
Recognizes interest and penalties related to uncertain tax positions	(173,000)	80,000	(396,000)
Accrued interest and penalties related to uncertain tax positions	$ 83,000	$ 257,000	$ 176,000
Period of unrecognized tax benefits	12 months