Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 28, 2015		Mar. 29, 2014
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		1,090
Gains (losses) included in other comprehensive income (loss)	1,152		1,760
Sales and settlements, net	(11,000)	[1]	(10,300)	[1]
Balance as of end of period	$ 10,312		$ 20,160

[1] During fiscal 2015 and 2014, the Company redeemed $11.0 million and $10.3 million of student loan auction rate securities, respectively, for cash at par value.