Share-Based Compensation (Compensation Expense Recognized In The Consolidated Statements Of Operations) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010
Amounts charged against earnings, before income tax benefit	$ 6,568	$ 5,846	$ 13,929	$ 11,353
Amount of related income tax benefit recognized in earnings	2,502	2,178	5,307	4,229
Stock Option and Non-vested Share Compensation Expense [Member]
Amounts charged against earnings, before income tax benefit	6,187	5,656	13,131	10,806
Associate Stock Purchase Plan Expense [Member]
Amounts charged against earnings, before income tax benefit	566	404	1,048	805
Amounts Capitalized in Software Development Costs, Net of Amortization [Member]
Amounts charged against earnings, before income tax benefit	$ (185)	$ (214)	$ (250)	$ (258)