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Restructuring Charges - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 23, 2019
office
Dec. 29, 2018
Oct. 04, 2020
USD ($)
Dec. 29, 2019
USD ($)
Sep. 29, 2019
USD ($)
Oct. 04, 2020
USD ($)
Sep. 29, 2019
USD ($)
Restructuring Cost and Reserve [Line Items]              
Restructuring Charges     $ (1,881)   $ 672 $ (3,156) $ 672
Number of employees   200          
2018 and 2019 Restructuring Plan [Member]              
Restructuring Cost and Reserve [Line Items]              
Restructuring Reserve     3,900     3,900  
2019 Restructuring Plan [Member]              
Restructuring Cost and Reserve [Line Items]              
Restructuring Charges       $ 9,000   2,234  
Restructuring Reserve     3,752 8,773   3,752  
Number of employees 105            
Severance costs       8,800      
Estimated restructuring costs remaining     9,000     9,000  
Expected savings from restructuring     6,000     6,000  
2019 Restructuring Plan [Member] | Workforce Reduction              
Restructuring Cost and Reserve [Line Items]              
Restructuring Charges           2,234  
Restructuring Reserve     $ 3,752 8,634   $ 3,752  
Number Of office leases | office 2            
2019 Restructuring Plan [Member] | Facility Closing [Member]              
Restructuring Cost and Reserve [Line Items]              
Restructuring Charges       $ 200