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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Oct. 02, 2018
Jan. 02, 2018
Jan. 01, 2019
Jun. 07, 2018
Jan. 03, 2017
Loss Contingencies [Line Items]          
Payments made   $ 4,000      
Restructuring Reserve   $ 8,179 $ 3,017   $ 1,880
Loss contingency accrual       $ 11,000  
Accrual, period increase $ 3,400        
Minimum          
Loss Contingencies [Line Items]          
Data breach liabilities, maximum exposure (up to)         10,600
Estimate of possible loss net of insurance coverage         $ 1,000