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Stock-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 03, 2012	Jun. 28, 2011	Jul. 03, 2012	Jun. 28, 2011
Stock-based compensation
Total stock-based compensation	$ 2,910	$ 2,965	$ 6,274	$ 5,946
Income tax benefit	1,113	1,134	2,400	2,274
Total stock-based compensation, net of taxes	1,797	1,831	3,874	3,672
Capitalized stock-based compensation	62	57	150	130
Labor expenses
Stock-based compensation
Total stock-based compensation	940	1,111	1,833	2,079
Other operating costs and expenses
Stock-based compensation
Total stock-based compensation	48	44	95	91
General and administrative expenses
Stock-based compensation
Total stock-based compensation	$ 1,922	$ 1,810	$ 4,346	$ 3,776

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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