Product Warranty (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 29, 2013	Mar. 30, 2013	Apr. 03, 2012
Product Warranty
Product warranty accrual, beginning	$ 4,187	$ 5,193	$ 5,411	$ 4,545
Warranty charges incurred, net	(2,044)
Provision for warranty charges	2,402
Product warranty accrual, ending		$ 5,193	$ 5,411	$ 4,545