Changes in Carrying Amount of Goodwill by Location (Detail) $ in Thousands	6 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill, beginning balance	$ 46,136
Foreign currency translation	1,383
Goodwill, ending balance	47,519
Americas
Goodwill, beginning balance	27,309
Foreign currency translation	0
Goodwill, ending balance	27,309
Europe
Goodwill, beginning balance	18,827
Foreign currency translation	1,383
Goodwill, ending balance	$ 20,210