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Stock-Based Compensation (Deferred Compensation) (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Current maturities of other long-term obligations $ 719 $ 876
Other long-term liabilities 11,581 15,104
Total deferred compensation 12,300 15,980
Total fair-market value of deferred compensation $ 8,885 $ 12,203