Revenue Components, Geographic Revenues and Significant Customers (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Apr. 01, 2012	Jan. 01, 2012	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Dec. 26, 2010	Sep. 26, 2010	Jun. 27, 2010	Apr. 01, 2012	Apr. 03, 2011	Mar. 28, 2010
Net revenues by geographic area
Net revenues	$ 135,073	$ 142,779	$ 136,275	$ 144,481	$ 146,069	$ 146,256	$ 135,376	$ 130,674	$ 558,608	$ 558,375	$ 518,471
United States [Member]
Net revenues by geographic area
Net revenues									239,198	244,717	235,213
Asia-Pacific and Japan [Member]
Net revenues by geographic area
Net revenues									178,715	155,165	129,636
Europe, Middle East and Africa [Member]
Net revenues by geographic area
Net revenues									113,873	125,413	121,676
Rest of world [Member]
Net revenues by geographic area
Net revenues									$ 26,822	$ 33,080	$ 31,946