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Summary of Significant Accounting Policies - Revenue by Vertical Market as Percentage of Total Revenue (Details) - Customer Concentration Risk [Member] - Sales Revenue, Services, Net [Member]
3 Months Ended 9 Months Ended
Sep. 29, 2023
Sep. 30, 2022
Sep. 29, 2023
Sep. 30, 2022
Concentration Risk [Line Items]        
Total revenue 100.00% 100.00% 100.00% 100.00%
Financial Services [Member]        
Concentration Risk [Line Items]        
Total revenue 15.10% 15.10% 16.40% 15.60%
Technology Service Providers [Member]        
Concentration Risk [Line Items]        
Total revenue 14.30% 22.40% 15.20% 23.50%
Manufacturing [Member]        
Concentration Risk [Line Items]        
Total revenue 13.50% 16.90% 14.60% 15.20%
Energy [Member]        
Concentration Risk [Line Items]        
Total revenue 6.60% 5.70% 6.50% 5.80%
General Markets [Member]        
Concentration Risk [Line Items]        
Total revenue 26.70% 20.80% 25.50% 21.90%
Healthcare [Member]        
Concentration Risk [Line Items]        
Total revenue 23.80% 19.10% 21.80% 18.00%