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Stock-Based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Oct. 01, 2013
Sep. 30, 2014
Oct. 01, 2013
Stock-based compensation        
Total stock-based compensation $ 4,055 $ 3,460 $ 11,793 $ 10,273
Income tax benefit 1,551 1,324 4,511 3,930
Total stock-based compensation, net of taxes 2,504 2,136 7,282 6,343
Capitalized stock-based compensation 55 41 154 129
Labor expenses
       
Stock-based compensation        
Total stock-based compensation 1,309 1,158 3,845 3,251
Other operating costs and expenses
       
Stock-based compensation        
Total stock-based compensation 52 35 141 133
General and administrative expenses
       
Stock-based compensation        
Total stock-based compensation $ 2,694 $ 2,267 $ 7,807 $ 6,889