Fair Value Measurements - Activity Related to Credit Loss on ARS (Details) (Available-for-sale Securities, Auction Rate Securities, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Available-for-sale Securities | Auction Rate Securities
Activity related to credit loss on ARS
Balance at beginning of period	$ 0	$ (10,979)	$ (13,980)
Other-than-temporary impairment recognized as credit loss	0	0	0
Sales of ARS	0	10,979	3,001
Balance at end of period	$ 0	$ 0	$ (10,979)