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Stock-Based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 02, 2013
Apr. 03, 2012
Stock-based compensation    
Total stock-based compensation $ 3,405 $ 3,364
Income tax benefit 1,302 1,287
Total stock-based compensation, net of taxes 2,103 2,077
Capitalized stock-based compensation 47 88
Labor expenses
   
Stock-based compensation    
Total stock-based compensation 1,044 893
Other operating costs and expenses
   
Stock-based compensation    
Total stock-based compensation 46 47
General and administrative expenses
   
Stock-based compensation    
Total stock-based compensation $ 2,315 $ 2,424