Equity-Based Compensation (Compensation Expense And Related Tax Benefit For Equity-Based Payments) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation	$ 4,245	$ 3,480	$ 8,045	$ 6,950
Income tax benefit	1,766	1,201	2,786	2,398
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation	298	299	533	537
Selling and Marketing Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation	399	264	760	774
Research and Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation	434	347	822	694
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation	$ 3,114	$ 2,570	$ 5,930	$ 4,945