Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 28, 2014		Jun. 29, 2013
Changes in Level 3 instruments measured at fair value on a recurring basis
Balance as of beginning of period	$ 20,160		$ 27,610
Gains (losses) included in interest and other expense, net	0		(75)
Gains (losses) included in other comprehensive income (loss)	544		846
Sales and settlements, net	0	[1]	(300)	[1]
Balance as of end of period	$ 20,704		$ 28,081

[1] During the first quarter of fiscal 2014, the Company redeemed $300 thousand of student loan auction rate securities, respectively, for cash at par value. There was no redemption during the first quarter of fiscal 2015.