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Intangible and Other Assets (Amortization Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
INTANGIBLE AND OTHER ASSETS      
Amortization expense for intangible assets $ 13,500 $ 15,000 $ 4,900
Estimated aggregate future amortization expense by fiscal year      
2018 11,905    
2019 11,575    
2020 11,028    
2021 7,190    
2022 $ 6,273