Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 29, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 6,021	$ 5,112
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale investments	(8)	(30)
Total comprehensive income	$ 6,013	$ 5,082