Product Warranty (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Product Warranty
Product warranty accrual, beginning	$ 5,563	$ 6,096	$ 5,411	$ 4,187
Warranty charges incurred, net	1,755	1,603	5,298	5,513
Provision for warranty charges	815	1,297	4,510	7,116
Product warranty accrual, ending	$ 4,623	$ 5,790	$ 4,623	$ 5,790