Stockholders' Equity (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Stock-based compensation expense
Stock-based compensation expense before income taxes	$ 24,731	$ 22,586	$ 14,453
Income tax benefit	8,135	7,616	5,174
Stock-based compensation expense after income taxes	16,596	14,970	9,279
Stock options [Member]
Stock-based compensation expense
Stock-based compensation expense before income taxes	8,654	8,330	5,721
Income tax benefit	2,990	2,966	2,048
Stock-based compensation expense after income taxes	5,664	5,364	3,673
Restricted stock grants [Member]
Stock-based compensation expense
Stock-based compensation expense before income taxes	16,077	14,256	8,732
Income tax benefit	5,145	4,650	3,126
Stock-based compensation expense after income taxes	$ 10,932	$ 9,606	$ 5,606