Share-Based Compensation (Compensation Expense Recognized In The Condensed Consolidated Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amounts charged against earnings, before income tax benefit	$ 10,222	$ 7,515	$ 27,768	$ 21,444
Amount of related income tax benefit recognized in earnings	3,910	2,875	10,621	8,182
Stock Option And Non-Vested Share Compensation Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amounts charged against earnings, before income tax benefit	9,721	7,232	26,304	20,363
Associate Stock Purchase Plan Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amounts charged against earnings, before income tax benefit	719	458	2,064	1,506
Amounts Capitalized In Software Development Costs, Net Of Amortization [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amounts charged against earnings, before income tax benefit	$ (218)	$ (175)	$ (600)	$ (425)