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Share Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 30, 2021
Mar. 31, 2020
Share-based Compensation    
Share-based compensation expense $ 9,908 $ 7,247
Labor expense    
Share-based Compensation    
Share-based compensation expense 2,584 2,388
General and administrative expense    
Share-based Compensation    
Share-based compensation expense $ 7,324 $ 4,859