Shareholders' Equity (Summary Of Stock-Based Compensation Expense, Net Of Tax) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 04, 2014	Jun. 28, 2013	Jul. 04, 2014	Jun. 28, 2013
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 10,975	$ 8,435	$ 21,087	$ 17,253
Cost Of Sales [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	763	607	1,510	1,207
Research And Development Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	1,738	1,232	3,215	2,379
Selling And Marketing Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	2,098	1,761	3,960	3,525
General And Administrative [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	6,376	4,835	12,402	10,142
Total Operating Expenses [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 10,212	$ 7,828	$ 19,577	$ 16,046