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Stock-Based Compensation - 2009 Employee Stock Purchase Plan (Details) - 2009 Employee Stock Purchase Plan - $ / shares
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Stock-Based Compensation      
Minimum exercise price as percentage of fair market value of shares on the date of grant 85.00%    
Term of award 24 months    
Shares issued 177,000 208,000 223,000
Weighted average fair value for purchase rights granted (in dollars per share) $ 36.12