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Deferred Revenue and Other Contract Liabilities - Unrecognized Contract Revenue (Details)
$ in Thousands
Sep. 28, 2019
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-12-31  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Unrecognized Contract Revenue $ 204,696
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-12-31  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Unrecognized Contract Revenue 302,540
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-12-31  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Unrecognized Contract Revenue 143,841
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-12-31  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Unrecognized Contract Revenue 37,259
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Unrecognized Contract Revenue $ 688,336