Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 28, 2015	Jun. 29, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 6,791	$ 6,021
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale investments	55	(8)
Total comprehensive income	$ 6,846	$ 6,013