Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Net income (loss)	$ 6,482	$ 263	$ 7,288	$ (313)
Changes in market value of investments, net of tax:
Changes in unrealized gain (loss) on investments	166	532	(418)	263
Reclassification adjustment for net realized gains (losses)	33	(115)	(26)	(153)
Net change in market value of investments	199	417	(444)	110
Comprehensive income (loss)	$ 6,681	$ 680	$ 6,844	$ (203)