Summary of Restructuring Activity (Detail) (USD $) In Thousands	6 Months Ended
	Oct. 01, 2011	Oct. 02, 2010
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 3,671	$ 9,761
Cost Incurred	3,008	1,400
Payments	(3,040)	(5,529)
Ending balance	3,639	5,632
Employee Severance
Restructuring Cost and Reserve [Line Items]
Beginning balance	2,782	9,761
Cost Incurred	2,528	1,400
Payments	(2,327)	(5,529)
Ending balance	2,983	5,632
Facility Closing
Restructuring Cost and Reserve [Line Items]
Beginning balance	889
Cost Incurred	480
Payments	(713)
Ending balance	$ 656