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Stock-Based Compensation (Compensation Cost) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Stock-based compensation expense $ 7,750 $ 8,141 $ 9,097