Restructuring - Schedule of Restructuring Charges and Cash Payments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Restructuring Cost And Reserve [Line Items]
Accrued restructuring balance	$ 180	$ 844
Cash payments	(162)	(1,078)
Charges to operations		1,179
Accrued restructuring balance	18	945
Severance Pay And Benefits
Restructuring Cost And Reserve [Line Items]
Accrued restructuring balance	180	844
Cash payments	(162)	(589)
Charges to operations		690
Accrued restructuring balance	$ 18	945
Facility Exit And Relocation Costs
Restructuring Cost And Reserve [Line Items]
Cash payments		(489)
Charges to operations		$ 489