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Stock-Based Compensation (Stock Option Vested or Expected to Vest and are Exercisable) (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 28, 2019
USD ($)
$ / shares
shares
Expected to vest  
Number (shares) | shares 1,484,810
Weighted-Average Exercise Price (in dollars per share) | $ / shares $ 38.95
Weighted-Average Remaining Exercisable Period (years) 8 years
Aggregate Intrinsic Value ($000s) | $ $ 1,597
Exercisable  
Number (shares) | shares 1,620,152
Weighted-Average Exercise Price (in dollars per share) | $ / shares $ 39.46
Weighted-Average Remaining Exercisable Period (years) 5 years 1 month 6 days
Aggregate Intrinsic Value ($000s) | $ $ 3,901