Activity Related to Product Warranty Liability (Detail) (USD $) In Thousands, unless otherwise specified	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Mar. 23, 2013	Apr. 28, 2012	Mar. 23, 2013	Apr. 28, 2012	Apr. 27, 2013
Product Warranty [Line Items]
Beginning balance	$ 1,075	$ 1,125	$ 1,072	$ 1,140	$ 2,800
Accruals/adjustments	(1,075)	43	(993)	164
Settlements	0	(85)	(79)	(221)
Ending balance	$ 0	$ 1,083	$ 0	$ 1,083	$ 2,800