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Share-Based Compensation Modifications of Share-Based Awards (Details)
$ in Thousands
12 Months Ended
Dec. 29, 2019
USD ($)
employees
Dec. 30, 2018
USD ($)
employees
Dec. 31, 2017
USD ($)
employees
Share-based Compensation Arrangement by Share-based Payment Award      
Number of employees subject to modification | employees 10 8 31
Reorganization and realignment      
Share-based Compensation Arrangement by Share-based Payment Award      
Increase in employee share-based compensation due to award modification | $ $ 1,011 $ 1,238 $ 4,930