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Segment Reporting - Narrative (Details)
$ in Thousands
12 Months Ended
Jul. 17, 2020
Jan. 22, 2020
vision_center
Jan. 02, 2021
USD ($)
segment
vision_center
store
Dec. 28, 2019
USD ($)
store
Dec. 29, 2018
USD ($)
Segment Reporting Information [Line Items]          
Number of reportable segments | segment     2    
Number of host operating segments | segment     2    
Number of retail vision centers | store     1,205 1,151  
Net revenue     $ 1,711,760 $ 1,724,331 $ 1,536,854
Corporate level COVID-19 related supplies expense and professional fees     $ 8,600    
Legacy          
Segment Reporting Information [Line Items]          
Number of retail vision centers | vision_center     230    
Management of operations | Legacy          
Segment Reporting Information [Line Items]          
Net revenue     $ 33,400 $ 35,500 $ 34,700
Walmart          
Segment Reporting Information [Line Items]          
Management and services agreement, extension 3 years 6 months      
Management and services agreement, automatic renewal 3 years        
Period of time prior to end of term for written notice of non-renewal (in months) 7 months        
Number of Vision Centers added to the management and services agreement | vision_center   5      
Walmart          
Segment Reporting Information [Line Items]          
Net revenue     $ 268,600