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Revenues - Activities and Ending Reserve Balances for Significant Categories of Discounts and Allowances (Details)
$ in Thousands
 3 Months Ended
Apr. 02, 2021
USD ($)
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]  
Balance at December 31, 2020 $ 30,536
Provision related to sales made in:  
Current period 85,756
Prior periods 1,237
Payments and customer credits issued (71,193)
Balance at March 31, 2021 46,336
Chargebacks, Discounts for Prompt Payment and Other  
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]  
Balance at December 31, 2020 9,853
Provision related to sales made in:  
Current period 52,470
Prior periods (27)
Payments and customer credits issued (49,636)
Balance at March 31, 2021 12,660
Other Customer Credits/Fees and Co-pay Assistance  
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]  
Balance at December 31, 2020 3,279
Provision related to sales made in:  
Current period 8,054
Prior periods (2)
Payments and customer credits issued (5,622)
Balance at March 31, 2021 5,709
Rebates  
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]  
Balance at December 31, 2020 17,404
Provision related to sales made in:  
Current period 25,232
Prior periods 1,266
Payments and customer credits issued (15,935)
Balance at March 31, 2021 $ 27,967