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Commitments and Contingencies (Details)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 27, 2020
USD ($)
Nov. 08, 2017
USD ($)
Nov. 30, 2019
USD ($)
plaintiff
May 31, 2017
USD ($)
Jun. 27, 2020
USD ($)
Jun. 29, 2019
USD ($)
Jul. 01, 2017
USD ($)
Jun. 27, 2020
USD ($)
Jun. 29, 2019
USD ($)
Loss Contingencies [Line Items]                  
Charge for litigation settlement         $ 0 $ 0   $ 4,395 $ 0
1-800 Contacts Matter                  
Loss Contingencies [Line Items]                  
Amount of litigation settlement       $ 7,000          
Charge for litigation settlement             $ 7,000    
Percent of settlement award deposited in escrow account (percent)   50.00%              
Amount of settlement deposited in escrow account   $ 3,500              
Wage and hours                  
Loss Contingencies [Line Items]                  
Gross settlement fund to be paid $ 3,500                
Fair Labor Standards Act                  
Loss Contingencies [Line Items]                  
Number of former employees | plaintiff     6            
Fair Labor Standards Act | Maximum                  
Loss Contingencies [Line Items]                  
Amount of litigation settlement     $ 895