Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 5,678	$ 6,147	$ 12,469	$ 12,168
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale investments	(34)	21	21	13
Total comprehensive income	$ 5,644	$ 6,168	$ 12,490	$ 12,181