Goodwill Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance	$ 33,003	$ 31,534
Foreign currency translation impact	(1,958)	1,469
Ending balance	$ 31,045	$ 33,003