Shareholders' Equity (Summary Of Stock-Based Compensation Expense, Net Of Tax) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 03, 2014	Sep. 27, 2013	Oct. 03, 2014	Sep. 27, 2013
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 11,038	$ 8,905	$ 32,125	$ 26,158
Cost Of Sales [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	776	609	2,286	1,816
Research And Development Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	1,600	1,265	4,815	3,644
Selling And Marketing Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	2,062	1,816	6,022	5,341
General and Administrative Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	6,600	5,215	19,002	15,357
Total Operating Expenses [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 10,262	$ 8,296	$ 29,839	$ 24,342