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Stock-Based Compensation - Stock options activity (Details) - Stock options
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 28, 2019
USD ($)
$ / shares
shares
Number of options  
Outstanding at the beginning of the year (in shares) | shares 137
Outstanding at the end of the year (in shares) | shares 137
Vested and expected to vest at the end of the year (in shares) | shares 43
Exercisable at the end of the year (in shares) | shares 93
Weighted-Average Exercise Price  
Outstanding at the beginning of the year (in dollars per share) | $ / shares $ 39.47
Outstanding at the end of the year (in dollars per share) | $ / shares 39.47
Vested and expected to vest at the end of the year (in dollars per share) | $ / shares 40.39
Exercisable at the end of the year (in dollars per share) | $ / shares $ 39.04
Weighted-Average Remaining Contractual Term (In years)  
Outstanding at the end of the year 6 years 1 month 17 days
Vested and expected to vest at the end of the year 6 years 1 month 13 days
Exercisable at the end of the year 6 years 1 month 17 days
Aggregate Intrinsic Value  
Outstanding at the end of the year (in dollars) | $ $ 10,515
Vested and expected to vest at the end of the year (in dollars) | $ 3,265
Options exercisable at the end of the year (in dollars) | $ $ 7,224