Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Income taxes paid	$ 13,589,000	$ 19,528,000	$ 20,791,000
Prepaid expenses and taxes	301,000	5,758,000
Recognizes interest and penalties related to uncertain tax positions	72,000	57,000	(173,000)
Accrued interest and penalties related to uncertain tax positions	$ 212,000	$ 140,000	$ 83,000