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Employee Benefit Plans (Schedule of Allocated Employee Stock-Based Compensation Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 03, 2020
Dec. 28, 2018
Dec. 29, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation $ 56,602 $ 40,626 $ 23,938
Research and development      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation 19,374 13,115 7,569
Selling, general and administrative      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation $ 37,228 $ 27,511 $ 16,369