Shareholders' Equity (Summary Of Stock-Based Compensation Expense, Net Of Tax) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 8,905	$ 7,684	$ 26,158	$ 23,628
Cost Of Sales [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	609	502	1,816	1,480
Research And Development Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	1,265	1,163	3,644	3,869
Selling And Marketing Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	1,816	1,616	5,341	5,244
General And Administrative [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	5,215	4,403	15,357	13,035
Total Operating Expenses [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 8,296	$ 7,182	$ 24,342	$ 22,148