Shareholders' Equity (Summary Of Stock-Based Compensation Expense, Net Of Tax) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 8,155	$ 7,129	$ 15,944	$ 13,927
Cost Of Sales [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	458	502	978	970
Research And Development Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	1,477	1,126	2,706	2,222
Selling And Marketing Expense [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	1,837	1,659	3,628	3,293
General And Administrative [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	4,383	3,842	8,632	7,442
Total Operating Expenses [Member]
Stockholders Equity [Line Items]
Total stock-based compensation expense	$ 7,697	$ 6,627	$ 14,966	$ 12,957