Revenue Components, Geographic Revenues and Significant Customers - Summary of Net Revenues by Product Category (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jan. 01, 2012	Oct. 02, 2011	Jul. 03, 2011	Mar. 31, 2013	Apr. 01, 2012	Apr. 03, 2011
Revenue from External Customer [Line Items]
Net revenues	$ 116,914	$ 119,386	$ 117,867	$ 130,371	$ 135,073	$ 142,779	$ 136,275	$ 144,481	$ 484,538	$ 558,608	$ 558,375
Host Products [Member]
Revenue from External Customer [Line Items]
Net revenues									369,919	429,820	422,143
Network Products [Member]
Revenue from External Customer [Line Items]
Net revenues									75,381	72,541	85,244
Silicon Products [Member]
Revenue from External Customer [Line Items]
Net revenues									$ 39,238	$ 56,247	$ 50,988