Stock-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 03, 2012	Mar. 29, 2011
Stock-based compensation
Stock-based compensation expense	$ 3,364	$ 2,981
Income tax benefit	1,287	1,140
Total stock-based compensation expense, net of tax	2,077	1,841
Capitalized stock-based compensation	88	72
Labor expenses
Stock-based compensation
Stock-based compensation expense	893	968
Other operating costs and expenses
Stock-based compensation
Stock-based compensation expense	47	47
General and administrative expenses
Stock-based compensation
Stock-based compensation expense	$ 2,424	$ 1,966