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Stock-Based Compensation - Stock Based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Stock-based compensation expense        
Stock-based compensation, before income taxes $ 10,199 $ 8,222 $ 19,873 $ 14,881
Provision for income taxes (3,619) (2,964) (7,004) (5,328)
Stock-based compensation, net of income tax 6,580 5,258 12,869 9,553
Cost of revenue        
Stock-based compensation expense        
Stock-based compensation, before income taxes 1,788 1,318 3,289 2,671
Selling, general and administrative        
Stock-based compensation expense        
Stock-based compensation, before income taxes $ 8,411 $ 6,904 $ 16,584 $ 12,210