Shareholders' Equity (Summary Of Stock-Based Compensation Expense, Net Of Tax) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2013	Mar. 30, 2012
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 8,818	$ 7,789
Cost Of Sales [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	600	520
Research And Development Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	1,147	1,229
Selling And Marketing Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	1,764	1,791
General And Administrative [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	5,307	4,249
Total Operating Expenses [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 8,218	$ 7,269