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Share-based Compensation, PSU (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 08, 2020
Dec. 29, 2020
Dec. 31, 2019
Dec. 25, 2018
Dec. 26, 2017
Dec. 27, 2016
Dec. 31, 2015
Share-based Compensation              
Expense compensation   $ 29,431 $ 35,500 $ 33,983      
RSUs              
Share-based Compensation              
Intrinsic value of awards vested (in dollars)   $ 30,500 $ 27,800 $ 32,100      
Vested (in shares)   (519,235)          
Granted (in shares)   501,575          
Unrecognized compensation cost of unvested stock awards (in dollars)   $ 19,200          
RSUs | Minimum              
Share-based Compensation              
Vesting period   1 year          
RSUs | Maximum              
Share-based Compensation              
Vesting period   5 years          
PSUs              
Share-based Compensation              
Vesting period     1 year 1 year 1 year 1 year 1 year
Intrinsic value of awards vested (in dollars)   $ 5,400 $ 8,800 $ 8,900      
Vested (in shares) (5,199) (95,946)          
Granted (in shares)   79,000          
Incremental Performance Shares (in shares)   18,946          
Target percentage relating to shares granted (as a percent)   100.00%