Share-Based Compensation (Compensation Expense Recognized In The Condensed Consolidated Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amounts charged against earnings, before income tax benefit	$ 8,597	$ 6,568	$ 17,546	$ 13,929
Amount of related income tax benefit recognized in earnings	3,288	2,502	6,711	5,307
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	8,252	6,187	16,583	13,131
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	613	566	1,345	1,048
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	$ (268)	$ (185)	$ (382)	$ (250)