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Stock-Based Compensation - Stock Based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Sep. 30, 2017
Sep. 24, 2016
Stock-based compensation expense        
Stock-based compensation, before income taxes $ 11,526 $ 10,600 $ 32,902 $ 32,647
Provision for income taxes (4,099) (3,785) (11,683) (11,653)
Stock-based compensation, net of income taxes 7,427 6,815 21,219 20,994
Cost of revenue        
Stock-based compensation expense        
Stock-based compensation, before income taxes 1,700 1,608 4,989 4,957
Selling, general and administrative        
Stock-based compensation expense        
Stock-based compensation, before income taxes $ 9,826 $ 8,992 $ 27,913 $ 27,690