Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 6,147	$ 5,207	$ 12,168	$ 10,319
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale investments	21	(13)	13	(43)
Total comprehensive income	$ 6,168	$ 5,194	$ 12,181	$ 10,276