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Business Combination - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Oct. 01, 2018
Sep. 29, 2018
Business Acquisition [Line Items]        
Increase of goodwill $ 30,900      
Telecom Holding Parent LLC        
Business Acquisition [Line Items]        
Ownership acquired     100.00%  
Acquisition-related costs 8,300      
2.125% Convertible Senior Notes Due September 1, 2024        
Business Acquisition [Line Items]        
Principal amount $ 402,500 $ 402,500   $ 1
Debt instrument interest percentage 2.125%