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Severance, Restructuring and Acquisition Integration Activities - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 27, 2020
Jun. 28, 2020
Mar. 29, 2020
Sep. 29, 2019
Sep. 27, 2020
Sep. 29, 2019
Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]              
Severance, restructuring, and acquisition integration costs $ 1,357     $ 3,047 $ 9,448 $ 5,566  
Restructuring and integration cost payable period         60 days    
Cost of Sales              
Restructuring Cost and Reserve [Line Items]              
Severance, restructuring, and acquisition integration costs 85     792 $ 222 1,092  
Selling, General and Administrative Expenses              
Restructuring Cost and Reserve [Line Items]              
Severance, restructuring, and acquisition integration costs 1,272     2,255 9,226 4,474  
Cost Reduction Plan              
Restructuring Cost and Reserve [Line Items]              
Severance, restructuring, and acquisition integration costs 200       3,200    
Restructuring and Integration, Incremental costs         9,600    
New charges 2,060 $ 4,660 $ 2,529        
Cost Reduction Plan | Forecast              
Restructuring Cost and Reserve [Line Items]              
Restructuring and Related Cost, Expected To Be Realized             $ 40,000
Cost Reduction Plan | Selling, General and Administrative Expenses              
Restructuring Cost and Reserve [Line Items]              
Restructuring and Related Cost, Expected Cost 60,000       60,000    
PPC Broadband and Opterna Integration Program              
Restructuring Cost and Reserve [Line Items]              
Severance, restructuring, and acquisition integration costs $ 900     $ 3,100 4,000 $ 5,600  
Restructuring and Integration, Incremental costs         $ 600