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Goodwill and Intangible Assets - Amortization Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Dec. 28, 2019
Property, Plant and Equipment [Line Items]          
Amortization of intangible assets $ 6,532 $ 6,079 $ 20,249 $ 20,248  
Finite-Lived Intangible Assets, Net, Amortization Expense, Rolling Maturity [Abstract]          
Remainder of 2020 6,105   6,105    
2021 14,945   14,945    
2022 5,708   5,708    
2023 3,954   3,954    
2024 2,200   2,200    
Thereafter 5,025   5,025    
Intangible Assets, Net 37,937   37,937   $ 57,610
Cost of revenues          
Property, Plant and Equipment [Line Items]          
Amortization of intangible assets 4,985 4,707 15,661 14,137  
Selling, general and administrative          
Property, Plant and Equipment [Line Items]          
Amortization of intangible assets $ 1,547 $ 1,372 $ 4,588 $ 6,111